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2019 Volume 82 Issue 8
2019, 82(8): 675-683
Abstract:
In this paper, the synthesis method of special micro-morphological PPy and its composites such as PPy/metal element, PPy/metal oxide, PPy/dyes and PPy/non-metal elements are summarized, and the differences in the morphology of PPy and its composites are analyzed. It was concluded that difference in micromorphology can affect the material properties. Current report on the application of PPy composites in the field of adsorption are briefly introduced, and the effects of different micro-morphologies on the adsorption properties are discussed. The excellent adsorption performance of PPy composites for dyes and heavy metals are also analyzed. The great application prospect and commercial value of PPy and its composites with special micromorphology in the field of adsorption is pointed out.
In this paper, the synthesis method of special micro-morphological PPy and its composites such as PPy/metal element, PPy/metal oxide, PPy/dyes and PPy/non-metal elements are summarized, and the differences in the morphology of PPy and its composites are analyzed. It was concluded that difference in micromorphology can affect the material properties. Current report on the application of PPy composites in the field of adsorption are briefly introduced, and the effects of different micro-morphologies on the adsorption properties are discussed. The excellent adsorption performance of PPy composites for dyes and heavy metals are also analyzed. The great application prospect and commercial value of PPy and its composites with special micromorphology in the field of adsorption is pointed out.
2019, 82(8): 675-683
Abstract:
In this paper, the synthesis method of special micro-morphological PPy and its composites such as PPy/metal element, PPy/metal oxide, PPy/dyes and PPy/non-metal elements are summarized, and the differences in the morphology of PPy and its composites are analyzed. It was concluded that difference in micromorphology can affect the material properties. Current report on the application of PPy composites in the field of adsorption are briefly introduced, and the effects of different micro-morphologies on the adsorption properties are discussed. The excellent adsorption performance of PPy composites for dyes and heavy metals are also analyzed. The great application prospect and commercial value of PPy and its composites with special micromorphology in the field of adsorption is pointed out.
In this paper, the synthesis method of special micro-morphological PPy and its composites such as PPy/metal element, PPy/metal oxide, PPy/dyes and PPy/non-metal elements are summarized, and the differences in the morphology of PPy and its composites are analyzed. It was concluded that difference in micromorphology can affect the material properties. Current report on the application of PPy composites in the field of adsorption are briefly introduced, and the effects of different micro-morphologies on the adsorption properties are discussed. The excellent adsorption performance of PPy composites for dyes and heavy metals are also analyzed. The great application prospect and commercial value of PPy and its composites with special micromorphology in the field of adsorption is pointed out.
2019, 82(8): 684-695
Abstract:
Owing to their high catalytic activity as well as stereoselectivity, Pd catalysts have been widely applied to the Heck cross-coupling reactions usually according to a catalytic mechanism comprising four sequential steps of oxidative addition of Pd(0), addition, β-H elimination, and reductive elimination. For ceramic, organic polymer, and organic-inorganic composite supported Pd catalysts, a rise in the Pd concentration increases its catalytic surface area; an enhancement of the Pd-support adsorption, a decrease in the size and an increase in the surface structure of the support raise the Pd degree of dispersion, an increase in the unsaturated coordination sites (UCSs) of the Pd accelerates its coordination with the reaction substrate to form an intermediate; an improvement in the degree of swelling of the support by the solvent expands the effective contact area between the Pd and the reaction substrate; and increases in the basicity and dosage of the base facilitate the Pd regeneration in the catalytic cycle, all of which enhance the catalytic activity of the Pd. Nevertheless, as the reaction temperature is raised steadily, the Pd catalytic activity usually increases first, going through a maximum at an optimum temperature, and then turns to decrease due to too significant thermal aggregation of the Pd. It has been one of the trends in the Heck reactions to develop supported Pd catalysts of clear catalytic mechanism, high catalytic activity, strong stereoselectivity, and satisfactory reusability.
Owing to their high catalytic activity as well as stereoselectivity, Pd catalysts have been widely applied to the Heck cross-coupling reactions usually according to a catalytic mechanism comprising four sequential steps of oxidative addition of Pd(0), addition, β-H elimination, and reductive elimination. For ceramic, organic polymer, and organic-inorganic composite supported Pd catalysts, a rise in the Pd concentration increases its catalytic surface area; an enhancement of the Pd-support adsorption, a decrease in the size and an increase in the surface structure of the support raise the Pd degree of dispersion, an increase in the unsaturated coordination sites (UCSs) of the Pd accelerates its coordination with the reaction substrate to form an intermediate; an improvement in the degree of swelling of the support by the solvent expands the effective contact area between the Pd and the reaction substrate; and increases in the basicity and dosage of the base facilitate the Pd regeneration in the catalytic cycle, all of which enhance the catalytic activity of the Pd. Nevertheless, as the reaction temperature is raised steadily, the Pd catalytic activity usually increases first, going through a maximum at an optimum temperature, and then turns to decrease due to too significant thermal aggregation of the Pd. It has been one of the trends in the Heck reactions to develop supported Pd catalysts of clear catalytic mechanism, high catalytic activity, strong stereoselectivity, and satisfactory reusability.
2019, 82(8): 684-695
Abstract:
Owing to their high catalytic activity as well as stereoselectivity, Pd catalysts have been widely applied to the Heck cross-coupling reactions usually according to a catalytic mechanism comprising four sequential steps of oxidative addition of Pd(0), addition, β-H elimination, and reductive elimination. For ceramic, organic polymer, and organic-inorganic composite supported Pd catalysts, a rise in the Pd concentration increases its catalytic surface area; an enhancement of the Pd-support adsorption, a decrease in the size and an increase in the surface structure of the support raise the Pd degree of dispersion, an increase in the unsaturated coordination sites (UCSs) of the Pd accelerates its coordination with the reaction substrate to form an intermediate; an improvement in the degree of swelling of the support by the solvent expands the effective contact area between the Pd and the reaction substrate; and increases in the basicity and dosage of the base facilitate the Pd regeneration in the catalytic cycle, all of which enhance the catalytic activity of the Pd. Nevertheless, as the reaction temperature is raised steadily, the Pd catalytic activity usually increases first, going through a maximum at an optimum temperature, and then turns to decrease due to too significant thermal aggregation of the Pd. It has been one of the trends in the Heck reactions to develop supported Pd catalysts of clear catalytic mechanism, high catalytic activity, strong stereoselectivity, and satisfactory reusability.
Owing to their high catalytic activity as well as stereoselectivity, Pd catalysts have been widely applied to the Heck cross-coupling reactions usually according to a catalytic mechanism comprising four sequential steps of oxidative addition of Pd(0), addition, β-H elimination, and reductive elimination. For ceramic, organic polymer, and organic-inorganic composite supported Pd catalysts, a rise in the Pd concentration increases its catalytic surface area; an enhancement of the Pd-support adsorption, a decrease in the size and an increase in the surface structure of the support raise the Pd degree of dispersion, an increase in the unsaturated coordination sites (UCSs) of the Pd accelerates its coordination with the reaction substrate to form an intermediate; an improvement in the degree of swelling of the support by the solvent expands the effective contact area between the Pd and the reaction substrate; and increases in the basicity and dosage of the base facilitate the Pd regeneration in the catalytic cycle, all of which enhance the catalytic activity of the Pd. Nevertheless, as the reaction temperature is raised steadily, the Pd catalytic activity usually increases first, going through a maximum at an optimum temperature, and then turns to decrease due to too significant thermal aggregation of the Pd. It has been one of the trends in the Heck reactions to develop supported Pd catalysts of clear catalytic mechanism, high catalytic activity, strong stereoselectivity, and satisfactory reusability.
2019, 82(8): 696-705
Abstract:
Palladium is widely used in industrial and medicial areas, but the residual Pd2+ has a great harm to human health and environment. In recent years, more and more attention have been paid to sensitive detection of residual Pd2+. Among them, coordination-based fluorescent probes are one of the most convenient and rapid detection methods for detecting Pd2+. In this paper, according to the coordination modes, coordination-based fluorescent probes including the coordination through N group elements (such as N、P), O group elements (such as O, S, Se), N group elements and O group elements, unsaturated bond and even polymers are reviewed. Through analyzing coordination modes, fluorescent probe structure, and detection efficiency, the review could provide a clue to further design more sensitive and efficient fluorescent probes for Pd2+ detection.
Palladium is widely used in industrial and medicial areas, but the residual Pd2+ has a great harm to human health and environment. In recent years, more and more attention have been paid to sensitive detection of residual Pd2+. Among them, coordination-based fluorescent probes are one of the most convenient and rapid detection methods for detecting Pd2+. In this paper, according to the coordination modes, coordination-based fluorescent probes including the coordination through N group elements (such as N、P), O group elements (such as O, S, Se), N group elements and O group elements, unsaturated bond and even polymers are reviewed. Through analyzing coordination modes, fluorescent probe structure, and detection efficiency, the review could provide a clue to further design more sensitive and efficient fluorescent probes for Pd2+ detection.
2019, 82(8): 696-705
Abstract:
Palladium is widely used in industrial and medicial areas, but the residual Pd2+ has a great harm to human health and environment. In recent years, more and more attention have been paid to sensitive detection of residual Pd2+. Among them, coordination-based fluorescent probes are one of the most convenient and rapid detection methods for detecting Pd2+. In this paper, according to the coordination modes, coordination-based fluorescent probes including the coordination through N group elements (such as N、P), O group elements (such as O, S, Se), N group elements and O group elements, unsaturated bond and even polymers are reviewed. Through analyzing coordination modes, fluorescent probe structure, and detection efficiency, the review could provide a clue to further design more sensitive and efficient fluorescent probes for Pd2+ detection.
Palladium is widely used in industrial and medicial areas, but the residual Pd2+ has a great harm to human health and environment. In recent years, more and more attention have been paid to sensitive detection of residual Pd2+. Among them, coordination-based fluorescent probes are one of the most convenient and rapid detection methods for detecting Pd2+. In this paper, according to the coordination modes, coordination-based fluorescent probes including the coordination through N group elements (such as N、P), O group elements (such as O, S, Se), N group elements and O group elements, unsaturated bond and even polymers are reviewed. Through analyzing coordination modes, fluorescent probe structure, and detection efficiency, the review could provide a clue to further design more sensitive and efficient fluorescent probes for Pd2+ detection.
2019, 82(8): 706-716
Abstract:
All-solid-state lithium-ion batteries have been widely used in portable electronic devices due to their advantages of good safety performance, high energy density, wide working-temperature range, etc. The solid electrolytes are the key material of all-solid-state lithium-ion batteries. Among various electrolytes, the sulfide-based materials have the characteristics of high ionic conductivity, wide electrochemical window, low grain boundary resistance and easy film formation, and is considered to be the most promising electrolyte in all-solid-state batteries. In this paper, we focused on the recent progress in the solid electrolytes with respect to the preparation, characterization and modification of Li2S-P2S5 electrolytes, and stability/compatibility of the interface between the solid electrolyte and the electrode. Moreover, the performance of these solid electrolyte related all-solid-state lithium-ion batteries are also reviewed.
All-solid-state lithium-ion batteries have been widely used in portable electronic devices due to their advantages of good safety performance, high energy density, wide working-temperature range, etc. The solid electrolytes are the key material of all-solid-state lithium-ion batteries. Among various electrolytes, the sulfide-based materials have the characteristics of high ionic conductivity, wide electrochemical window, low grain boundary resistance and easy film formation, and is considered to be the most promising electrolyte in all-solid-state batteries. In this paper, we focused on the recent progress in the solid electrolytes with respect to the preparation, characterization and modification of Li2S-P2S5 electrolytes, and stability/compatibility of the interface between the solid electrolyte and the electrode. Moreover, the performance of these solid electrolyte related all-solid-state lithium-ion batteries are also reviewed.
2019, 82(8): 706-716
Abstract:
All-solid-state lithium-ion batteries have been widely used in portable electronic devices due to their advantages of good safety performance, high energy density, wide working-temperature range, etc. The solid electrolytes are the key material of all-solid-state lithium-ion batteries. Among various electrolytes, the sulfide-based materials have the characteristics of high ionic conductivity, wide electrochemical window, low grain boundary resistance and easy film formation, and is considered to be the most promising electrolyte in all-solid-state batteries. In this paper, we focused on the recent progress in the solid electrolytes with respect to the preparation, characterization and modification of Li2S-P2S5 electrolytes, and stability/compatibility of the interface between the solid electrolyte and the electrode. Moreover, the performance of these solid electrolyte related all-solid-state lithium-ion batteries are also reviewed.
All-solid-state lithium-ion batteries have been widely used in portable electronic devices due to their advantages of good safety performance, high energy density, wide working-temperature range, etc. The solid electrolytes are the key material of all-solid-state lithium-ion batteries. Among various electrolytes, the sulfide-based materials have the characteristics of high ionic conductivity, wide electrochemical window, low grain boundary resistance and easy film formation, and is considered to be the most promising electrolyte in all-solid-state batteries. In this paper, we focused on the recent progress in the solid electrolytes with respect to the preparation, characterization and modification of Li2S-P2S5 electrolytes, and stability/compatibility of the interface between the solid electrolyte and the electrode. Moreover, the performance of these solid electrolyte related all-solid-state lithium-ion batteries are also reviewed.
2019, 82(8): 717-724, 730
Abstract:
Thermal storage phase change materials (PCM, constant temperature latent heat energy storage materials) are receiving more and more attention because of their high performances. The energy storage is achieved in the corresponding system during the phase change process of the PCM, this can alleviate the mismatch of heat in time, intensity and location. The advantages of PCM include the good stability and the high heat storage capacity. These materials are environmentally friendly, which is in line with the country's energy conservation and environmental protection policies, and the efficiency of the corresponding systems is greatly enhanced by using the PCM. The types, characteristics and latest developments of various PCM are introduced, and the future development are also discussed.
Thermal storage phase change materials (PCM, constant temperature latent heat energy storage materials) are receiving more and more attention because of their high performances. The energy storage is achieved in the corresponding system during the phase change process of the PCM, this can alleviate the mismatch of heat in time, intensity and location. The advantages of PCM include the good stability and the high heat storage capacity. These materials are environmentally friendly, which is in line with the country's energy conservation and environmental protection policies, and the efficiency of the corresponding systems is greatly enhanced by using the PCM. The types, characteristics and latest developments of various PCM are introduced, and the future development are also discussed.
2019, 82(8): 717-724,730
Abstract:
Thermal storage phase change materials (PCM, constant temperature latent heat energy storage materials) are receiving more and more attention because of their high performances. The energy storage is achieved in the corresponding system during the phase change process of the PCM, this can alleviate the mismatch of heat in time, intensity and location. The advantages of PCM include the good stability and the high heat storage capacity. These materials are environmentally friendly, which is in line with the country's energy conservation and environmental protection policies, and the efficiency of the corresponding systems is greatly enhanced by using the PCM. The types, characteristics and latest developments of various PCM are introduced, and the future development are also discussed.
Thermal storage phase change materials (PCM, constant temperature latent heat energy storage materials) are receiving more and more attention because of their high performances. The energy storage is achieved in the corresponding system during the phase change process of the PCM, this can alleviate the mismatch of heat in time, intensity and location. The advantages of PCM include the good stability and the high heat storage capacity. These materials are environmentally friendly, which is in line with the country's energy conservation and environmental protection policies, and the efficiency of the corresponding systems is greatly enhanced by using the PCM. The types, characteristics and latest developments of various PCM are introduced, and the future development are also discussed.
2019, 82(8): 725-730
Abstract:
Biomass surfactants have become the best alternative to petroleum-based surfactants due to their wide source of raw materials, renewable, non-polluting and other advantages. Biomass surfactants are mainly prepared by natural lipids, carbohydrates, proteins and biomass phenols. Because of their special amphiphilic structure, they have good properties such as dispersity, emulsification, thickening, flocculation and unique physiological property. So they have great application advantages in food, medical, daily chemicals and other industries. Based on the development direction of surfactants, this paper reviews the research progress of preparation of surfactants based on biomass, and prospects the development direction of biomass surfactants.
Biomass surfactants have become the best alternative to petroleum-based surfactants due to their wide source of raw materials, renewable, non-polluting and other advantages. Biomass surfactants are mainly prepared by natural lipids, carbohydrates, proteins and biomass phenols. Because of their special amphiphilic structure, they have good properties such as dispersity, emulsification, thickening, flocculation and unique physiological property. So they have great application advantages in food, medical, daily chemicals and other industries. Based on the development direction of surfactants, this paper reviews the research progress of preparation of surfactants based on biomass, and prospects the development direction of biomass surfactants.
2019, 82(8): 725-730
Abstract:
Biomass surfactants have become the best alternative to petroleum-based surfactants due to their wide source of raw materials, renewable, non-polluting and other advantages. Biomass surfactants are mainly prepared by natural lipids, carbohydrates, proteins and biomass phenols. Because of their special amphiphilic structure, they have good properties such as dispersity, emulsification, thickening, flocculation and unique physiological property. So they have great application advantages in food, medical, daily chemicals and other industries. Based on the development direction of surfactants, this paper reviews the research progress of preparation of surfactants based on biomass, and prospects the development direction of biomass surfactants.
Biomass surfactants have become the best alternative to petroleum-based surfactants due to their wide source of raw materials, renewable, non-polluting and other advantages. Biomass surfactants are mainly prepared by natural lipids, carbohydrates, proteins and biomass phenols. Because of their special amphiphilic structure, they have good properties such as dispersity, emulsification, thickening, flocculation and unique physiological property. So they have great application advantages in food, medical, daily chemicals and other industries. Based on the development direction of surfactants, this paper reviews the research progress of preparation of surfactants based on biomass, and prospects the development direction of biomass surfactants.
2019, 82(8): 731-736
Abstract:
6H-dibenzo[b,d]pyran-6-one compounds have received increasing attention from chemists due to their wide range of biological activities and fluorescent properties. The synthetic methods of 6H-dibenzo[b,d] pyran-6-one and its derivatives, including intramolecular cyclization forming pyran ring, C-H bond activation intramolecular cyclization, coupling reaction to form phenyl skeletons, through intramolecular lacotination of substituted biphenyl compounds, were reviewed. The advantages and disadvantages of all these synthetic methods were compared and discussed in detail. In the future, how to efficiently, economically and greenly synthesize 6H-dibenzo[b,d]pyran-6-one and its analogues containing specific substituents at specific positions is still a major issue in the field of natural product synthesis.
6H-dibenzo[b,d]pyran-6-one compounds have received increasing attention from chemists due to their wide range of biological activities and fluorescent properties. The synthetic methods of 6H-dibenzo[b,d] pyran-6-one and its derivatives, including intramolecular cyclization forming pyran ring, C-H bond activation intramolecular cyclization, coupling reaction to form phenyl skeletons, through intramolecular lacotination of substituted biphenyl compounds, were reviewed. The advantages and disadvantages of all these synthetic methods were compared and discussed in detail. In the future, how to efficiently, economically and greenly synthesize 6H-dibenzo[b,d]pyran-6-one and its analogues containing specific substituents at specific positions is still a major issue in the field of natural product synthesis.
2019, 82(8): 731-736
Abstract:
6H-dibenzo[b, d]pyran-6-one compounds have received increasing attention from chemists due to their wide range of biological activities and fluorescent properties. The synthetic methods of 6H-dibenzo[b, d] pyran-6-one and its derivatives, including intramolecular cyclization forming pyran ring, C-H bond activation intramolecular cyclization, coupling reaction to form phenyl skeletons, through intramolecular lacotination of substituted biphenyl compounds, were reviewed. The advantages and disadvantages of all these synthetic methods were compared and discussed in detail. In the future, how to efficiently, economically and greenly synthesize 6H-dibenzo[b, d]pyran-6-one and its analogues containing specific substituents at specific positions is still a major issue in the field of natural product synthesis.
6H-dibenzo[b, d]pyran-6-one compounds have received increasing attention from chemists due to their wide range of biological activities and fluorescent properties. The synthetic methods of 6H-dibenzo[b, d] pyran-6-one and its derivatives, including intramolecular cyclization forming pyran ring, C-H bond activation intramolecular cyclization, coupling reaction to form phenyl skeletons, through intramolecular lacotination of substituted biphenyl compounds, were reviewed. The advantages and disadvantages of all these synthetic methods were compared and discussed in detail. In the future, how to efficiently, economically and greenly synthesize 6H-dibenzo[b, d]pyran-6-one and its analogues containing specific substituents at specific positions is still a major issue in the field of natural product synthesis.
2019, 82(8): 737-742,748
Abstract:
The dyes as the particularly important material component of the dye sensitized solar cells (DSSC), carry out two functions:absorbing light energy and initiating the electrical current. And the dyes with long-lived charge-separated state can effectively improve electron injection efficiency, suppress charge recombination, and thereby improve device performance. All-solid-state dye-sensitized solar cells (ssDDSC) were fabricated using the charge separation (CS) dyes as photosensitizer and spiro-OMeTAD as hole-transport material. The effect of TiO2 film thickness on the performance of ssDDSC was analyzed. When the TiO2 film thickness was 1.2 μm, the device performance was optimal. The influence of dye structure on device performance was also discussed. The ssDSSC based on MTPABT-Pyc has the best performance, with photocurrent of 7.38 mA/cm2 and efficiency of 3.06%. The dye MTPABT-Pyc had similar light-harvesting ability compared to the charge-transfer dye (CT type) MTPAcc, but its efficiency is 16% higher than to that of MTPAcc (2.64%). These results indicate that the charge-separated state of the CS-type dye has a superiority for the suppression of charge recombination and the transport of holes.
The dyes as the particularly important material component of the dye sensitized solar cells (DSSC), carry out two functions:absorbing light energy and initiating the electrical current. And the dyes with long-lived charge-separated state can effectively improve electron injection efficiency, suppress charge recombination, and thereby improve device performance. All-solid-state dye-sensitized solar cells (ssDDSC) were fabricated using the charge separation (CS) dyes as photosensitizer and spiro-OMeTAD as hole-transport material. The effect of TiO2 film thickness on the performance of ssDDSC was analyzed. When the TiO2 film thickness was 1.2 μm, the device performance was optimal. The influence of dye structure on device performance was also discussed. The ssDSSC based on MTPABT-Pyc has the best performance, with photocurrent of 7.38 mA/cm2 and efficiency of 3.06%. The dye MTPABT-Pyc had similar light-harvesting ability compared to the charge-transfer dye (CT type) MTPAcc, but its efficiency is 16% higher than to that of MTPAcc (2.64%). These results indicate that the charge-separated state of the CS-type dye has a superiority for the suppression of charge recombination and the transport of holes.
2019, 82(8): 737-742, 748
Abstract:
The dyes as the particularly important material component of the dye sensitized solar cells (DSSC), carry out two functions:absorbing light energy and initiating the electrical current. And the dyes with long-lived charge-separated state can effectively improve electron injection efficiency, suppress charge recombination, and thereby improve device performance. All-solid-state dye-sensitized solar cells (ssDDSC) were fabricated using the charge separation (CS) dyes as photosensitizer and spiro-OMeTAD as hole-transport material. The effect of TiO2 film thickness on the performance of ssDDSC was analyzed. When the TiO2 film thickness was 1.2 μm, the device performance was optimal. The influence of dye structure on device performance was also discussed. The ssDSSC based on MTPABT-Pyc has the best performance, with photocurrent of 7.38 mA/cm2 and efficiency of 3.06%. The dye MTPABT-Pyc had similar light-harvesting ability compared to the charge-transfer dye (CT type) MTPAcc, but its efficiency is 16% higher than to that of MTPAcc (2.64%). These results indicate that the charge-separated state of the CS-type dye has a superiority for the suppression of charge recombination and the transport of holes.
The dyes as the particularly important material component of the dye sensitized solar cells (DSSC), carry out two functions:absorbing light energy and initiating the electrical current. And the dyes with long-lived charge-separated state can effectively improve electron injection efficiency, suppress charge recombination, and thereby improve device performance. All-solid-state dye-sensitized solar cells (ssDDSC) were fabricated using the charge separation (CS) dyes as photosensitizer and spiro-OMeTAD as hole-transport material. The effect of TiO2 film thickness on the performance of ssDDSC was analyzed. When the TiO2 film thickness was 1.2 μm, the device performance was optimal. The influence of dye structure on device performance was also discussed. The ssDSSC based on MTPABT-Pyc has the best performance, with photocurrent of 7.38 mA/cm2 and efficiency of 3.06%. The dye MTPABT-Pyc had similar light-harvesting ability compared to the charge-transfer dye (CT type) MTPAcc, but its efficiency is 16% higher than to that of MTPAcc (2.64%). These results indicate that the charge-separated state of the CS-type dye has a superiority for the suppression of charge recombination and the transport of holes.
2019, 82(8): 743-748
Abstract:
A simple and efficient fluorescent probe L was synthesized by using 2-hydroxy-1-naphthaldehyde and isophthalic dihydrazide as raw materials. Its structure were characterized by 1H NMR,13C NMR and HRMS. Probe L displays an highly selective recognition and a lower detection limit (5.924×10-6mol/L) for Al3+ over other tested metal ions, which has a significant fluorescence enhancement in the mixed ETOH and water (1:1) system. This probe L has a binding ratio of 1:2. In addition, the L-2Al3+ showed highly selective sequential recognition of pyrophosphate ions (PPi) with good sensitivity. The detection limit of L-2Al3+ to PPi could reach 4.756×10-5mol/L. The fluorescent probe has potential application value.
A simple and efficient fluorescent probe L was synthesized by using 2-hydroxy-1-naphthaldehyde and isophthalic dihydrazide as raw materials. Its structure were characterized by 1H NMR,13C NMR and HRMS. Probe L displays an highly selective recognition and a lower detection limit (5.924×10-6mol/L) for Al3+ over other tested metal ions, which has a significant fluorescence enhancement in the mixed ETOH and water (1:1) system. This probe L has a binding ratio of 1:2. In addition, the L-2Al3+ showed highly selective sequential recognition of pyrophosphate ions (PPi) with good sensitivity. The detection limit of L-2Al3+ to PPi could reach 4.756×10-5mol/L. The fluorescent probe has potential application value.
2019, 82(8): 743-748
Abstract:
A simple and efficient fluorescent probe L was synthesized by using 2-hydroxy-1-naphthaldehyde and isophthalic dihydrazide as raw materials. Its structure were characterized by 1H NMR, 13C NMR and HRMS. Probe L displays an highly selective recognition and a lower detection limit (5.924×10-6mol/L) for Al3+ over other tested metal ions, which has a significant fluorescence enhancement in the mixed ETOH and water (1:1) system. This probe L has a binding ratio of 1:2. In addition, the L-2Al3+ showed highly selective sequential recognition of pyrophosphate ions (PPi) with good sensitivity. The detection limit of L-2Al3+ to PPi could reach 4.756×10-5mol/L. The fluorescent probe has potential application value.
A simple and efficient fluorescent probe L was synthesized by using 2-hydroxy-1-naphthaldehyde and isophthalic dihydrazide as raw materials. Its structure were characterized by 1H NMR, 13C NMR and HRMS. Probe L displays an highly selective recognition and a lower detection limit (5.924×10-6mol/L) for Al3+ over other tested metal ions, which has a significant fluorescence enhancement in the mixed ETOH and water (1:1) system. This probe L has a binding ratio of 1:2. In addition, the L-2Al3+ showed highly selective sequential recognition of pyrophosphate ions (PPi) with good sensitivity. The detection limit of L-2Al3+ to PPi could reach 4.756×10-5mol/L. The fluorescent probe has potential application value.
2019, 82(8): 749-753
Abstract:
The Cu2O/Ag composites were prepared environmentally and conveniently by using copper acetate as the copper source, silver nitrate as the silver source and natural honey as the reducing agents without any high pressure reactor and template. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the structure and morphology of as-prepared Cu2O/Ag composites. It is proved by the inhibition zone method that the Cu2O/Ag composite has better antibacterial activity against E. coli than Cu2O. By analyzing the effect of Cu2O/Ag on the growth process of E. coli, it was found that the Cu2O/Ag composites could completely inhibit the growth of E. coli when the concentration of Cu2O/Ag composites was 10μg/mL. The changes of the morphology of E. coli during the process of adding Cu2O/Ag composites were observed by SEM. The antibacterial effect of Cu2O/Ag composites on E. coli is to destroy the cell membrane structure and break the bacteria into small segments. These small segments gradually shrink and are completely decomposed into macromolecular substances. All of these results indicated that the Cu2O/Ag composites have potential practical application value in the field of antibacterial agents.
The Cu2O/Ag composites were prepared environmentally and conveniently by using copper acetate as the copper source, silver nitrate as the silver source and natural honey as the reducing agents without any high pressure reactor and template. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the structure and morphology of as-prepared Cu2O/Ag composites. It is proved by the inhibition zone method that the Cu2O/Ag composite has better antibacterial activity against E. coli than Cu2O. By analyzing the effect of Cu2O/Ag on the growth process of E. coli, it was found that the Cu2O/Ag composites could completely inhibit the growth of E. coli when the concentration of Cu2O/Ag composites was 10μg/mL. The changes of the morphology of E. coli during the process of adding Cu2O/Ag composites were observed by SEM. The antibacterial effect of Cu2O/Ag composites on E. coli is to destroy the cell membrane structure and break the bacteria into small segments. These small segments gradually shrink and are completely decomposed into macromolecular substances. All of these results indicated that the Cu2O/Ag composites have potential practical application value in the field of antibacterial agents.
2019, 82(8): 749-753
Abstract:
The Cu2O/Ag composites were prepared environmentally and conveniently by using copper acetate as the copper source, silver nitrate as the silver source and natural honey as the reducing agents without any high pressure reactor and template. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the structure and morphology of as-prepared Cu2O/Ag composites. It is proved by the inhibition zone method that the Cu2O/Ag composite has better antibacterial activity against E. coli than Cu2O. By analyzing the effect of Cu2O/Ag on the growth process of E. coli, it was found that the Cu2O/Ag composites could completely inhibit the growth of E. coli when the concentration of Cu2O/Ag composites was 10μg/mL. The changes of the morphology of E. coli during the process of adding Cu2O/Ag composites were observed by SEM. The antibacterial effect of Cu2O/Ag composites on E. coli is to destroy the cell membrane structure and break the bacteria into small segments. These small segments gradually shrink and are completely decomposed into macromolecular substances. All of these results indicated that the Cu2O/Ag composites have potential practical application value in the field of antibacterial agents.
The Cu2O/Ag composites were prepared environmentally and conveniently by using copper acetate as the copper source, silver nitrate as the silver source and natural honey as the reducing agents without any high pressure reactor and template. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the structure and morphology of as-prepared Cu2O/Ag composites. It is proved by the inhibition zone method that the Cu2O/Ag composite has better antibacterial activity against E. coli than Cu2O. By analyzing the effect of Cu2O/Ag on the growth process of E. coli, it was found that the Cu2O/Ag composites could completely inhibit the growth of E. coli when the concentration of Cu2O/Ag composites was 10μg/mL. The changes of the morphology of E. coli during the process of adding Cu2O/Ag composites were observed by SEM. The antibacterial effect of Cu2O/Ag composites on E. coli is to destroy the cell membrane structure and break the bacteria into small segments. These small segments gradually shrink and are completely decomposed into macromolecular substances. All of these results indicated that the Cu2O/Ag composites have potential practical application value in the field of antibacterial agents.
2019, 82(8): 754-757
Abstract:
Polymer microspheres with different morphologies are widely used in biology and materials science. At present, an increasing number of researchers choose to use microfluidic technology as a platform to prepare polymer microspheres. Here, a method based on microfluidic technology to prepare magnetic polymer microspheres with topological structure by adjusting the HLB value of the surfactant was reported. The results showed that the HLB value of different surfactants can regulate the evolution behavior of droplets and the morphology of target microspheres. This method has certain universality. It can be used as an effective supplement to the preparation of polymer microspheres.
Polymer microspheres with different morphologies are widely used in biology and materials science. At present, an increasing number of researchers choose to use microfluidic technology as a platform to prepare polymer microspheres. Here, a method based on microfluidic technology to prepare magnetic polymer microspheres with topological structure by adjusting the HLB value of the surfactant was reported. The results showed that the HLB value of different surfactants can regulate the evolution behavior of droplets and the morphology of target microspheres. This method has certain universality. It can be used as an effective supplement to the preparation of polymer microspheres.
2019, 82(8): 754-757
Abstract:
Polymer microspheres with different morphologies are widely used in biology and materials science. At present, an increasing number of researchers choose to use microfluidic technology as a platform to prepare polymer microspheres. Here, a method based on microfluidic technology to prepare magnetic polymer microspheres with topological structure by adjusting the HLB value of the surfactant was reported. The results showed that the HLB value of different surfactants can regulate the evolution behavior of droplets and the morphology of target microspheres. This method has certain universality. It can be used as an effective supplement to the preparation of polymer microspheres.
Polymer microspheres with different morphologies are widely used in biology and materials science. At present, an increasing number of researchers choose to use microfluidic technology as a platform to prepare polymer microspheres. Here, a method based on microfluidic technology to prepare magnetic polymer microspheres with topological structure by adjusting the HLB value of the surfactant was reported. The results showed that the HLB value of different surfactants can regulate the evolution behavior of droplets and the morphology of target microspheres. This method has certain universality. It can be used as an effective supplement to the preparation of polymer microspheres.
2019, 82(8): 758-761
Abstract:
A new compound, 4-[2-(3,4-dimethoxyphenyl)ethenyl]-N-methylpyridinium perchlorate, was synthesized by the reaction of pyridinium salt with 3,4-dimethoxybenzaldehyde in methanol. The structure of the compound was determined by IR, elemental analysis, 1H NMR and ESI-MS. The crystal structure of the compound was further determined by X-ray single crystal diffraction. The crystal belongs to orthorhombic system with space group Pbca, a=13.5897(11)nm, b=13.9126(11)nm, c=17.3485(14)nm, α=90°, β=90°, γ=90°, Mr=355.76,V=3280.0(5)nm3, Z=8, F(000)=1488,Dc=1.181 g/cm3, μ=0.265mm-1. Meanwhile, the optical property of the titled compound was also studied.
A new compound, 4-[2-(3,4-dimethoxyphenyl)ethenyl]-N-methylpyridinium perchlorate, was synthesized by the reaction of pyridinium salt with 3,4-dimethoxybenzaldehyde in methanol. The structure of the compound was determined by IR, elemental analysis, 1H NMR and ESI-MS. The crystal structure of the compound was further determined by X-ray single crystal diffraction. The crystal belongs to orthorhombic system with space group Pbca, a=13.5897(11)nm, b=13.9126(11)nm, c=17.3485(14)nm, α=90°, β=90°, γ=90°, Mr=355.76,V=3280.0(5)nm3, Z=8, F(000)=1488,Dc=1.181 g/cm3, μ=0.265mm-1. Meanwhile, the optical property of the titled compound was also studied.
2019, 82(8): 758-761
Abstract:
A new compound, 4-[2-(3, 4-dimethoxyphenyl)ethenyl]-N-methylpyridinium perchlorate, was synthesized by the reaction of pyridinium salt with 3, 4-dimethoxybenzaldehyde in methanol. The structure of the compound was determined by IR, elemental analysis, 1H NMR and ESI-MS. The crystal structure of the compound was further determined by X-ray single crystal diffraction. The crystal belongs to orthorhombic system with space group Pbca, a=13.5897(11)nm, b=13.9126(11)nm, c=17.3485(14)nm, α=90°, β=90°, γ=90°, Mr=355.76, V=3280.0(5)nm3, Z=8, F(000)=1488, Dc=1.181 g/cm3, μ=0.265mm-1. Meanwhile, the optical property of the titled compound was also studied.
A new compound, 4-[2-(3, 4-dimethoxyphenyl)ethenyl]-N-methylpyridinium perchlorate, was synthesized by the reaction of pyridinium salt with 3, 4-dimethoxybenzaldehyde in methanol. The structure of the compound was determined by IR, elemental analysis, 1H NMR and ESI-MS. The crystal structure of the compound was further determined by X-ray single crystal diffraction. The crystal belongs to orthorhombic system with space group Pbca, a=13.5897(11)nm, b=13.9126(11)nm, c=17.3485(14)nm, α=90°, β=90°, γ=90°, Mr=355.76, V=3280.0(5)nm3, Z=8, F(000)=1488, Dc=1.181 g/cm3, μ=0.265mm-1. Meanwhile, the optical property of the titled compound was also studied.
2019, 82(8): 762-767
Abstract:
After the promulgation of the Law of the People's Republic of China on the Popularization of Science and Technology in 2002, the number of popular chemistry books published from 2003 to 2011 showed an overall upward trend. Places of publication and publishing houses are generally scattered, though with a high degree of local concentration. In terms of the subjects of the books that are published, the most popular books are on basic chemistry knowledge, followed by the culture of science, then practical knowledge, and last, frontiers in chemistry. General laws, regulations and policies concerning popular science have little influence on the creation of popular chemistry books. Only when related to social development indicators restricted by the country, major social events involving citizens' lives and safety took place, and specific implementation policies for specific groups of people are issued popular science laws and policies can promote the publication of popularized chemistry books. Among the authors of popular books on chemistry, the proportion of chemical researchers is relatively low, and most of the popular books written by them do not involve the frontier knowledge of chemistry.
After the promulgation of the Law of the People's Republic of China on the Popularization of Science and Technology in 2002, the number of popular chemistry books published from 2003 to 2011 showed an overall upward trend. Places of publication and publishing houses are generally scattered, though with a high degree of local concentration. In terms of the subjects of the books that are published, the most popular books are on basic chemistry knowledge, followed by the culture of science, then practical knowledge, and last, frontiers in chemistry. General laws, regulations and policies concerning popular science have little influence on the creation of popular chemistry books. Only when related to social development indicators restricted by the country, major social events involving citizens' lives and safety took place, and specific implementation policies for specific groups of people are issued popular science laws and policies can promote the publication of popularized chemistry books. Among the authors of popular books on chemistry, the proportion of chemical researchers is relatively low, and most of the popular books written by them do not involve the frontier knowledge of chemistry.
2019, 82(8): 762-767
Abstract:
After the promulgation of the Law of the People's Republic of China on the Popularization of Science and Technology in 2002, the number of popular chemistry books published from 2003 to 2011 showed an overall upward trend. Places of publication and publishing houses are generally scattered, though with a high degree of local concentration. In terms of the subjects of the books that are published, the most popular books are on basic chemistry knowledge, followed by the culture of science, then practical knowledge, and last, frontiers in chemistry. General laws, regulations and policies concerning popular science have little influence on the creation of popular chemistry books. Only when related to social development indicators restricted by the country, major social events involving citizens' lives and safety took place, and specific implementation policies for specific groups of people are issued popular science laws and policies can promote the publication of popularized chemistry books. Among the authors of popular books on chemistry, the proportion of chemical researchers is relatively low, and most of the popular books written by them do not involve the frontier knowledge of chemistry.
After the promulgation of the Law of the People's Republic of China on the Popularization of Science and Technology in 2002, the number of popular chemistry books published from 2003 to 2011 showed an overall upward trend. Places of publication and publishing houses are generally scattered, though with a high degree of local concentration. In terms of the subjects of the books that are published, the most popular books are on basic chemistry knowledge, followed by the culture of science, then practical knowledge, and last, frontiers in chemistry. General laws, regulations and policies concerning popular science have little influence on the creation of popular chemistry books. Only when related to social development indicators restricted by the country, major social events involving citizens' lives and safety took place, and specific implementation policies for specific groups of people are issued popular science laws and policies can promote the publication of popularized chemistry books. Among the authors of popular books on chemistry, the proportion of chemical researchers is relatively low, and most of the popular books written by them do not involve the frontier knowledge of chemistry.
