Browse Articles

The first issue is scheduled to be published in Dec. 2018.

Call for Papers

CCS Chemistry is the flagship general journal for the cutting edge and fundamental research in the areas of chemica research facing global audiences published by Chinese Chemical Society. We call for excellent papers cover but not limited to synthetic chemistry, catalysis & surface chemistry, chemical theory and mechanism, chemical metrology, materials & energy chemistry, environmental chemistry, chemical biology, chemical engineering and industrial chemistry. Professional arrangement ensures that all papers can be reviewed and published online quickly and efficiently (one or two weeks).

Contact information:

Dr. Hao Linxiao,  haolinxiao@iccas.ac.cn;  +86-10-82449177-888

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Review
Recent progress in fluorescent and colorimetric sensors for the detection of ions and biomolecules
Le Yu , Yimu Qiao , Lanxi Miao , Yanqi He , Ying Zhou
2018, 29(11): 1545-1559  doi: 10.1016/j.cclet.2018.09.005
[Abstract](88) [FullText HTML] [PDF 1397KB](28)
Abstract:
Optical sensors are widely used in the field of analytical sensing and optical imaging because of their high sensitivity, fast response time, and technical simplicity. The advantages of sensors lay in their noninvasive approach within biological tissues and inherent reliability in fluorescence imaging tests. In recent years the development of optical sensors for the sensing of ions, neutral molecules and especially tumor micro-environment-related parameters has been an active research area. This review focuses on recent contributions concerning fluorescent or colorimetric sensors and is organized according to their target classifications.
Cucurbit[10]uril-based chemistry
Xiran Yang , Fengbo Liu , Zhiyong Zhao , Feng Liang , Haijun Zhang , Simin Liu
2018, 29(11): 1560-1566  doi: 10.1016/j.cclet.2018.01.032
[Abstract](54) [FullText HTML] [PDF 1420KB](13)
Abstract:
Cucurbit[n]urils (CB[n]s, n=5-8, 10, 13-15) have been proven to be an interesting macrocyclic family with their distinctive molecular recognition properties and fascinating applications in fields such as catalysis, supramolecular materials, drug delivery and biological systems. With the biggest cavity in the CB[n]s family, CB[10] shows its unique molecular recognition properties that are rather distinctive from other CB[n]s. In this review, we summarize the progresses in CB[10]-based chemistry since CB[10] was first reported as CB[10]·CB[5] complex in 2001. Purification, molecular recognition and supramolecular assembly of CB[10] will be described and an outlook will be given for further exploration of CB[10]-based chemistry.
State of the art: Lateral flow assay (LFA) biosensor for on-site rapid detection
Shuai Zhao , Sai Wang , Shan Zhang , Jiahui Liu , Yiyang Dong
2018, 29(11): 1567-1577  doi: 10.1016/j.cclet.2017.12.008
[Abstract](117) [FullText HTML] [PDF 862KB](5)
Abstract:
Recently, lateral flow assay (LFA) has attracted researchers' attention because of its considerable advantages of superior portability, rapid detection, cost-effectiveness and ease of use. This review provides a brief overview of latest researches of LFA, including the practical use of LFA in both qualitative and quantitative analysis in different areas. Though bio-recognition molecules in the LFA used to be antibodies, a new kind of recognition element called aptamer, showing significant advantages, is developed rapidly in recent years. The highly specific recognition of aptamers/antibodies and targets are combined with the excellent properties of a dry-reagent strip biosensor that enables efficiently detection in point-of-care applications. Herein, we compared the aptamers with antibodies, summarized the principle of LFAs, and three main elements for the LFAs (recognition molecule, signal transduction element, the targets). Additionally, we summarized different optimal experimental conditions in the recent LFA-related studies to give detailed overview of the LFA development. We hope the review can give a general guide for the development of LFAs.
Recent developments of miniature ion trap mass spectrometers
Qi Guo , Lijuan Gao , Yanbing Zhai , Wei Xu
2018, 29(11): 1578-1584  doi: 10.1016/j.cclet.2017.12.009
[Abstract](266) [FullText HTML] [PDF 1034KB](4)
Abstract:
With outstanding analytical performance and portability, miniature mass spectrometer is one of the most powerful tools for in-situ analysis. The miniaturization of mass spectrometers has lasted for more than ten years, during which a number of miniature mass spectrometers employing different techniques have been developed. Small-in-size, working at relatively high pressure region and capable of performing tandem mass spectrometry, ion trap is the most widely used mass analyzer in miniature mass spectrometer systems. The recent development of miniature ion trap mass spectrometer systems in the last ten years was reviewed in this paper. These instruments adopt different atmospheric pressure interfaces (APIs), which are membrane inlets (MIs), discontinuous atmospheric pressure interface (DAPI) and continuous atmospheric pressure interface (CAPI). This review emphasizes on the mini mass spectrometry (MS) system that can be handheld by one person, but not the field-able ones that are too large to be hand-portable.
Reviews
Computational studies of cinchona alkaloid-catalyzed asymmetric Michael additions
Han Li , Xin Hong
2018, 29(11): 1585-1590  doi: 10.1016/j.cclet.2018.01.030
[Abstract](46) [FullText HTML] [PDF 1253KB](7)
Abstract:
Cinchona alkaloid is one of the most effective organocatalysts that facilitate a wide range of transformations. To elucidate the mechanistic details and especially the origins of the observed high enantio-and diastereoselectivities, computational chemists have contributed dramatic efforts in this important area. This review covers the recent computational studies on the cinchona alkaloid-catalyzed asymmetric Michael additions, including both C-C and C-S bond formations, to present a general viewpoint of these fruitful advances. Based on the types of bond formation and the cinchona alkaloid catalysts, key information regarding the activation model and the origins of enantioselectivities is discussed.
Topochemical polymerization of diphenyldiacetylene-based materials and the relevant application in photocatalysis
Yiye Lu , Liangliang Zhu
2018, 29(11): 1591-1600  doi: 10.1016/j.cclet.2018.03.005
[Abstract](83) [FullText HTML] [PDF 2004KB](3)
Abstract:
The diphenyldiacetylene (DPDA) and the corresponding polymers has become one of hot research topics in the field of functional materials, due to its highly π-conjugated system and outstanding electrochemical properties. Compared with routine polydiacetylenes, polydiphenyldiacetylene (PDPDA) has wider π-extension within the whole polymer structure and a larger intermolecular stacking tendency. Since the preorganization of monomers is essential for the topochemical polymerization, we here introduce several self-assembled methods and external-templated methods for the proper alignment of DPDA. From the perspective of morphology, the monomer structures and external templates are two of the important factors towards polymerization. Based on its structure, PDPDA can become a promising intelligent material for various optoelectical applications, and specifically we summarize the application of PDPDA as an effective phtocatalyst in organic pollutants degradation
Synthesis, functionalization, and nanomedical applications of functional magnetic nanoparticles
Zhou Chen , Cao Wu , Zhenfeng Zhang , Wangping Wu , Xuefeng Wang , Zhiqiang Yu
2018, 29(11): 1601-1608  doi: 10.1016/j.cclet.2018.08.007
[Abstract](75) [FullText HTML] [PDF 870KB](10)
Abstract:
Synthesis of magnetic nanoparticles (MNPs) is one of the most active research areas in advanced materials. MNPs that have magnetic properties and other functionalities have been demonstrated to show great promise in nanomedical applications. This review summarizes the current MNPs preparation, functionalization and stabilization methods. It also analyzes the detailed features of MNPs. And furthermore it highlights some actual case analyses of these MNPs for disease therapy, drug delivery, hyperthermia, bioseparation and bioimaging applications.
Communications
Bone-targeting melphalan prodrug with tumor-microenvironment sensitivity: Synthesis, in vitro and in vivo evaluation
Can Chen , Yiyan Li , Xiaoping Yu , Qinglin Jiang , Xiaohong Xu , Qian Yang , Zhiyong Qian
2018, 29(11): 1609-1612  doi: 10.1016/j.cclet.2018.02.010
[Abstract](54) [FullText HTML] [PDF 875KB](7)
Abstract:
Bone tumor is a refractory neoplastic growth of tissue in bone. According to the unique environment and phys-chemical characteristics of bone tissues, the chemotherapeutic agents are unlikely to prolong the survival of patients and often associated with systemic side effects. The bone targeting drug delivery via systemic administration may provide both better treatment efficacy and less frequent administration. In this study, we describe the synthesis, in vitro and in vivo evaluation of novel melphalan-bisphosphonate hybrids, with a tumor microenvironment sensitive linkage, which could be enzymatic activation under tumor microenvironment conditions. We have also evaluated the in vitro targeting efficiency of these prodrugs via the affinity of hydroxyapatite (HA) and cellular proliferation. The in vivo distribution suggested the bisphosphonate conjugated prodrugs with high bone selectivity.
Synthesis and combined properties of novel fluorinated cationic surfactants derived from hexafluoropropylene dimer
Chao Lin , Renming Pan , Ping Xing , Biao Jiang
2018, 29(11): 1613-1616  doi: 10.1016/j.cclet.2018.04.017
[Abstract](51) [FullText HTML] [PDF 770KB](10)
Abstract:
Three novel fluorinated cationic surfactants were prepared byadopting perfluoro-2-methyl-2-pentene as raw substrate. The as-obtained fluorinated cationic surfactants exhibited excellent surface properties, all of them can reduce the surface tension of water to below 20.00 mN/m at the critical micelle concentrations (CMC). The incorporation of SDS, AOS, APG or LAB into 2-(4-(3, 3, 4, 4, 5, 5, 5-heptafluoro-2, 2-bis(trifluoromethyl)pentyl)benzamido)-N, N-dimethylethana-mine oxide 4a could generate much lower CMC and surface tension value at the CMC than individual 4a. Especially, the surface tension values of that combined APG/4a can be reduced to 17.31 mN/m. The excellent surface activities and their remarkable compatibility to various types of hydrocarbon surfactants make them as sustainable alternatives to PFOA (perfluorooctanoic acid, C7F15CO2H) and PFOS (perfluorooctane sulphonate, C8F17SO3X, with X=K, Na, H).
Sulfonate group modified Ni catalyst for highly efficient liquid-phase selective hydrogenation of bio-derived furfural
Wanbing Gong , Chun Chen , Haojie Wang , Ruoyu Fan , Haimin Zhang , Guozhong Wang , Huijun Zhao
2018, 29(11): 1617-1620  doi: 10.1016/j.cclet.2018.03.030
[Abstract](70) [FullText HTML] [PDF 683KB](4)
Abstract:
The liquid-phase furfural (FAL) hydrogenation to furfuryl alcohol (FOL) and tetrahydrofurfuryl alcohol (THFOL) was investigated using sulfonate group (-SO3H) grafted activated carbon (AC) supported Ni catalyst, which was prepared and activated simultaneously by liquid phase reduction method. This functionalized nickel catalyst demonstrated an enhanced catalytic performance for selective hydrogenation of FAL, in which almost 100% FOL (< 80℃) and THFOL (>100℃) selectivity with complete conversion was obtained, respectively. More importantly, the conversion of transfer hydrogenation of FAL to FOL also can reach almost 100% under optimal conditions (140℃, 4.0 h). The effect of -SO3H was evaluated and systematically analyzed by the combination of reaction performance and physico-chemical characterizations. Cycling test proved the prepared catalyst could be recycled and reused for several times without noticeably reducing catalytic activity of hydrogenation.
Constructing supramolecular polymers from phototrigger containing monomer
Xiuli Zheng , Qi Miao , Wenzhi Wang , Da-Hui Qu
2018, 29(11): 1621-1624  doi: 10.1016/j.cclet.2018.04.002
[Abstract](87) [FullText HTML] [PDF 790KB](2)
Abstract:
A new type of photo-induced supramolecular polymer was fabricated by host-guest interaction from a phototrigger containing building block. A dibenzo-24-crown-8 (DB24C8) macrocycle and dibenzylammonium (DBA) site containing linear monomer was designed and synthesized. The coumarin, as a photocleavable protector, was introduced to the terminal of the monomer. When exposed to the UV light, the coumarin unit would be cleavaged and the monomer without terminal coumarin can self-assemble into supramolecular polymers via the host-guest interaction between DB24C8 moieties and DBA units. Increasing the concentration of the monomer, the supramolecular polymers will convert to supramolecular organogel by cross-linking with each other.
Organocatalytic asymmetric cascade cyclization reaction of o-hydroxy cinnamaldehydes with diphenylphosphine oxide
Haiyun Sun , Yuan Li , Wei Liu , Yang Zheng , Zhengjie He
2018, 29(11): 1625-1628  doi: 10.1016/j.cclet.2018.01.026
[Abstract](52) [FullText HTML] [PDF 908KB](2)
Abstract:
A highly stereoselective asymmetric cascade cyclization reaction between o-hydroxycinnamaldehydes and diphenylphosphine oxide has been achieved with 84%-99% ee and 7:1-20:1 dr under the catalysis of L-diarylprolinol silyl ether. This reaction provides a facile access to highly enantioenriched 4-diphenylphosphinyl chroman-2-ols. It also represents a novel organocatalytic asymmetric phosphaMichael addition of α, β-unsaturated aldehydes with pentavalent P-nucleophiles.
Exploitation of a photoelectrochemical sensing platform for bisphenol A quantitative determination using Cu/graphitic carbon nitride nanocomposites
Sheng Feng , Pengcheng Yan , Li Xu , Jiexiang Xia , Huaming Li
2018, 29(11): 1629-1632  doi: 10.1016/j.cclet.2018.08.010
[Abstract](52) [FullText HTML] [PDF 794KB](4)
Abstract:
A simple and effective photoelectrochemical sensor was fabricated by Cu/graphitic carbon nitride (Cu/gCN) composites for detecting bisphenol A. The Cu/g-CN composites were obtained via a solvothermal process in the presence of the copper-based ionic liquid. In view of localized surface plasmon resonance of Cu nanoparticles, Cu nanoparticles can promote light absorbance and rapid electron transport of g-CN. As a result, the Cu/g-CN composites obtained greatly enhancement of photocurrent, when compared to the pure g-CN. In addition, the introduction of bisphenol A can hinder electron-hole recombination, resulting in sensitive photoelectrochemical monitoring of bisphenol A. The detection limit of the bisphenol A photoelectrochemical sensor was below 0.012 μmol/L. The bisphenol A photoelectrochemical sensor exhibited an excellent stability and acceptable anti-interference. The photoelectrochemical sensor provided the promising platform to monitor bisphenol A at low concentration in water environment.
Preparation and electrocatalytic properties of gold nanoparticles loaded carbon nanotubes
Yulong Chen , Guowei Zhao , Ling Lin
2018, 29(11): 1633-1636  doi: 10.1016/j.cclet.2018.01.055
[Abstract](43) [FullText HTML] [PDF 1017KB](4)
Abstract:
Nano gold (Au) particles loaded carbon nanotubes (Nano-Au/CNTs) were prepared by a new method. Polar groups and defects were introduced on the surface of the prepared Nano-Au/CNTs by a mixed acids treatment process, and their electrocatalytic properties were investigated in this study. Comparing with the traditional preparation method, the particle nano size of Au can be controlled and it is easier to wash the sodium citrate by this method. Comparing t performance.
Selective recognition of HIV RNA by dinuclear metallic ligands
Xuedong Li , Bo Chen , Ling Lan , Ruili Wang , Duqiang Luo , Li Liu , Liang Cheng
2018, 29(11): 1637-1640  doi: 10.1016/j.cclet.2018.06.003
[Abstract](44) [FullText HTML] [PDF 882KB](0)
Abstract:
We describe the development of dinuclear metallic ligands to target specific HIV RNA structures. Two series of dipyridinyl-N bridged dinuclear metal complexes were synthesized in moderate to good yields and their binding activities toward TAR and RRE RNA were studied both experimentally and theoretically. The docking calculation elucidated some structure features in dimetallic complexes that can affect TAR RNA-binding properties.
Direct low-temperature synthesis of ultralong persistent luminescence nanobelts based on a biphasic solution-chemical reaction
Haoyang Liu , Xiaoxia Hu , Jie Wang , Meng Liu , Wei Wei , Quan Yuan
2018, 29(11): 1641-1644  doi: 10.1016/j.cclet.2018.02.005
[Abstract](55) [FullText HTML] [PDF 881KB](4)
Abstract:
Here, we report the direct hydrothermal synthesis of 1D-based Zn2GeO4:Mn2+ persistent luminescent nanobelts (ZGO:Mn PLNBs). The ZGO:Mn PLNBs exhibit rapid growth rate, and nanobelts can be obtained after 30 min of hydrothermal treatment. The persistent luminescence performance can be fine-turned upon prolonging the hydrothermal time. Furthermore, the doping ratio of Mn2+ exhibits influence on the persistent luminescence properties of ZGO:Mn PLNBs, and 2% doping of Mn2+ shows superior persistent luminescence with decay time of longer than 20 min. The developed 1D-based ZGO:Mn PLNBs can be simply prepared with the hydrothermal method and show tunable morphology and persistent luminescence. We believe that this solid-state-reaction-free chemical approach avoids the current key drawback in regard to PLNMs development, and thus will promote the broad use of these unique nanostructured PLNMs in developing optical device for imaging.
Unique fluorescence properties of a self-assembling bis-pyrene molecule
Zhaozhong Li , Yang Li , Dong Wang , Qing Cui , Zhengqiang Li , Lei Wang , Huai Yang
2018, 29(11): 1645-1647  doi: 10.1016/j.cclet.2018.01.056
[Abstract](55) [FullText HTML] [PDF 771KB](2)
Abstract:
A self-assembling bis-pyrene (BP) molecule with π-π interactions was designed and synthesized. In condensed state, the BP self-assembled into highly-ordered mesophase at room temperature, which was characterized by using differential scanning calorimetry (DSC), polarized optical microscope (POM), and 1D wide angle X-ray diffraction (WAXD) techniques. In solution, the BP self-assembled into nanofibers in the mixed dichloromethane and hexane (1:1 volume ratio) solvent. Interestingly, the BP was not fluorescent when dissolved in dichloromethane solution. However, the self-assembled nanostructures of BP in the mixed solvent showed high intensity of green fluorescence. The advantages of self-assembly and fluorescence feature exhibited that BP could be promising fluorescence nanoprobes or nanosensors for various applications.
Light-triggered release of insecticidally active spirotetramat-enol
Zhiping Xu , Zhenhong Gao , Xusheng Shao
2018, 29(11): 1648-1650  doi: 10.1016/j.cclet.2018.01.025
[Abstract](56) [FullText HTML] [PDF 858KB](4)
Abstract:
Spirotetramat metabolizes to its active enol form in the plant. We described here a photocaged pesticide delivery system that can release insecticidal spirotetramat enol form upon light irradiation. Covalently linking spirotetramat-enol with photoresponsive coumarin generated the caged insecticide. The photophysical and photochemical properties, deprotection photolysis and insecticidal activities of the caged spirotetramat enol were studied. This light-triggered system can undergo cleavage to release free spirotetramat enol form at the presence of blue light (420 nm) or sunlight. Bioassays indicated that the triggered molecule has no obvious insecticidal activity against Aphis craccivora Koch at dark and could be activated by light to release the insecticidal ingredients, which provides precise control over insecticide delivery.
Synthetic[FeFe]-H2ase models bearing phosphino thioether chelating ligands
Yingjie Zhao , Xin Yu , Huilan Hu , Xinlong Hu , Sakthi Raje , Raja Angamuthu , Chen-Ho Tung , Wenguang Wang
2018, 29(11): 1651-1655  doi: 10.1016/j.cclet.2018.03.013
[Abstract](63) [FullText HTML] [PDF 863KB](8)
Abstract:
A series of {2Fe3S} complexes bearing phosphino thioether chelating ligand were synthesized on the basis of Fe2(Me2pdt)(1, 2-Cy2PC6H4SMe)(CO)4 (Me2pdt=Me2C(CH2S-)2, 1). The disubstituted Fe(Ⅰ)Fe(Ⅰ) compound 1 exhibits a reversible one-electron redox even for[Fe(Ⅰ)Fe(Ⅱ)]+/0 couple. Based on the oxidation of 1 to[1]+, the tri-substituted[Fe(Ⅰ)Fe(Ⅱ)]+ cationic complex[Fe2(Me2pdt)(1, 2-Cy2PC6H4SMe) (PPh3)(CO)3]+ ([2]+) was synthesized. Reduction of[2]+ provided the neutral tri-substituted Fe(Ⅰ)Fe(Ⅰ) compound 2. The substitution of the CO in 1 ligand by PPh3 results in an anodic shift of the FeFeI/FeIFeI couple of 470 mV. Most importantly, this substitution also leads to the Fe-Fe bonds in 1 and 2 with large Lewis basicity difference, i.e. △pKaMeCN~10.
Communication
Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries
Zhijia Zhang , Yuxuan Hou , Shaofei Zhang , Guoliang Zhang , Ming Li , Huanming Lu , Yong Li , Xuerong Zheng , Zhijun Qiao , Zhenyang Yu , Qin Huang , Jianli Kang
2018, 29(11): 1656-1660  doi: 10.1016/j.cclet.2018.06.017
[Abstract](105) [FullText HTML] [PDF 963KB](5)
Abstract:
Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional (3D) metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity (995 mAh/g), which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability.
Rational construction of self-assembly azobenzene derivative monolayers with photoswitchable surface properties
Yu Zhang , Peng Gao , Qin Yue , Peter Trefonas , Yonghui Deng
2018, 29(11): 1661-1665  doi: 10.1016/j.cclet.2018.06.023
[Abstract](47) [FullText HTML] [PDF 777KB](4)
Abstract:
Photo-responsive azobenzene (ABZ) derivatives with different end groups (R) as photoswitchable molecules were employed to construct self-assembled monolayers (SAMs) on silicon substrate by using 3-glycidoxypropyltrimethoxysilane (GPTS) as the bridging molecules. The assembly process was optimized by changing various parameters, including the type and concentration of ABZ derivatives, reaction time, etc. The obtained SAMs were fully characterized and evaluated using UV spectroscopy, atomic force microscope (AFM), elllipsometer, static contact angle and X-ray photoelectron spectroscopy (XPS). It is found that the end group property of azobenzene derivatives is critical to the obtained SAMs' photoresponsive properties. Compared with hydrophobic compounds (4-(4'-aminophenylazo) benzoic acid, ABZ-CF3), the hydrophilic compounds (4-(4'-aminophenylazo) benzoic acid, ABZ-COOH) show excellent reversible photoswitching performance with a large contact angle change of 35° under optimized process, and the SAMs are removable by thermal treatment at 240℃ in air for only 5 min.
Visualizing the toughening origins of gel-grown calcite single-crystal composites
Yujing Liu , Kai He , Wentao Yuan , Xinyi Jin , Tao Liang , Yong Wang , Huolin L. Xin , Hongzheng Chen , Chao Gao , Hanying Li
2018, 29(11): 1666-1670  doi: 10.1016/j.cclet.2018.05.044
[Abstract](55) [FullText HTML] [PDF 924KB](8)
Abstract:
Biogenic single crystals have been widely demonstrated to incorporate macromolecules to achieve extra damage tolerance, spurring investigations on their synthetic analogs with enhanced mechanical properties as well as the enhancement mechanism(s) behind. And the investigations rely on both rational design of the single-crystal composites and, equally importantly, nanoscale and in-situ characterization strategy. Here, composite structures are constructed inside the calcite single-crystal host by incorporating guest materials of agarose fibers, multi-walled carbon nanotubes (MWCNTs), and graphene oxide (GO), through crystallization in agarose gel media. Further, transmission electron microscopy-scanning probe microscopy (TEM-SPM) method, coupling compression measurements with nanoscale imaging, shows that the obtained single-crystal composites exhibit improved toughness, compared to the solution-grown pure single crystals. Particularly, the rupture time increases by 1.25 times after the gel-networks and MWCNTs are incorporated. More importantly, the in-situ observation of the crystal deformation suggests that the guest incorporation toughens the single-crystal host by the shielding effect of nanofiber on crack-bridging at nanoscale. As such, this work may have implications for understanding the damage tolerance of biominerals as well as towards the development of new mechanically reinforced single-crystal composite materials.
Three-dimensional nitrogen-doped graphene hydrogel supported Co-CeOx nanoclusters as efficient catalysts for hydrogen generation from hydrolysis of ammonia borane
Yana Men , Jun Su , Chaozhang Huang , Lijing Liang , Ping Cai , Gongzhen Cheng , Wei Luo
2018, 29(11): 1671-1674  doi: 10.1016/j.cclet.2018.04.009
[Abstract](52) [FullText HTML] [PDF 853KB](2)
Abstract:
The development of highly active noble-metal-free catalysts for catalytic hydrolysis of ammonia borane is mandatory for its application in hydrogen storage. Herein, Co-CeOx nanoclusters have been successfully anchored on a three-dimensional nitrogen-doped graphene hydrogel (NGH) by a simple coreduction method and further used as efficient catalysts to catalytic hydrolysis of ammonia borane at room temperature. Thanks to the strong synergistic electronic effect between Co and CeOx, as well as the strong metal-support interaction between Co-CeOx and 3D NGH, the as-synthesized Co-(CeOx)0.91/NGH catalyst exhibits superior catalytic activity toward hydrolysis of ammonia borane, with the turnover frequency (TOF) value of 79.5 min-1, which is almost 13 times higher than that of Co/NGH, and higher than most of the reported noble-metal-free catalysts.
High performance organic transistors and phototransistors based on diketopyrrolopyrrole-quaterthiophene copolymer thin films fabricated via low-concentration solution processing
Pengcheng Gu , Mengxiao Hu , Shang Ding , Guangyao Zhao , Yifan Yao , Feng Liu , Xiaotao Zhang , Huanli Dong , Xiangke Wang , Wenping Hu
2018, 29(11): 1675-1680  doi: 10.1016/j.cclet.2018.03.034
[Abstract](42) [FullText HTML] [PDF 1028KB](2)
Abstract:
Conjugated polymers have received considerable attentions over the past years due to their large-area potential applications via low-cost solution processing. Improving crystallinity of conjugated polymer molecules in solution-processed thin films is crucial for their efficient charge transport and thus high performance optoelectronic devices. Herein, with diketopyrrolopyrrole-quaterthiophene (PDQT) copolymer as an example, it is found that by simply reducing the solution concentration for spincoating meanwhile with the assistance of post-annealing, significantly enhanced film crystallinity with formation of typical single crystalline domains is obtained, which benefits from the enough space for better molecular assembly especially at the semiconductor/dielectric interface. High performance polymer transistors and phototransistors were finally constructed based on the optimal lowconcentration (2 mg/mL) spin-coated PDQT films (~12 nm), which giving a high charge carrier mobility of 2.28 cm2 V-1 s-1 and a photoresponse on/off ratio of 2.1×107 at VG=0 V under white light irradiation of 6 mW/cm2. The results suggest that the bright future of PDQT crystalline films for large-area flexible integrated optoelectronic devices and the application of effective low-concentration processing approach in solution-processed organic electronics with reduced material waste.
Fabrication of flexible thin organic transistors by trace water assisted transfer method
Junjie Kan , Shuguang Wang , Zhongwu Wang , Shujing Guo , Wenchong Wang , Liqiang Li
2018, 29(11): 1681-1684  doi: 10.1016/j.cclet.2018.07.015
[Abstract](49) [FullText HTML] [PDF 1012KB](2)
Abstract:
The development of fabrication method for flexible thin organic electronic device is highly important for the flexible and wearable products. Herein, we develop a facile peel-off method to transfer organic thin film to various substrates. In this strategy, polyacrylonitrile (PAN) film can be easily peeled off with trace water and further transferred to various substrates. Using PAN as supporting and dielectric layers, high performance flexible organic transistors are fabricated. Remarkably, the method uses only micro volume water as an assist to peel off PAN film, which reduces the risk of contamination by solvent and greatly contributes to the performance maintenance.
Highly biocompatible BSA-MnO2 nanoparticles as an efficient near-infrared photothermal agent for cancer therapy
Yuzhen Wang , Yujun Song , Guixian Zhu , Dechen Zhang , Xuewu Liu
2018, 29(11): 1685-1688  doi: 10.1016/j.cclet.2017.12.004
[Abstract](60) [FullText HTML] [PDF 898KB](2)
Abstract:
More recently, the biomedical applications of MnO2 in bioanalysis, cell imaging, and drug delivery as a result of their appealing physicochemical properties, have been reported and expanded rapidly. However, research on a near infrared (NIR) photothermal response of MnO2 was ignored. In this work, we reported a facile, one-pot method to synthesis of bovine serum albumin (BSA)-reduced and stabilized MnO2 nanoparticles (BSA-MnO2 NPs) with good aqueous dispersibility and high biocompatibility. And we also showed for the first time that BSA-MnO2 NPs displayed superior NIR photothermal efficiency and photostability which demonstrated as a novel class of photothermal antitumor agent.
Oxygen vacancy promoting adsorption property of BiOI microspheres modified with SDS
Fenqiang Ma , Jingwen Yao , Yanfeng Zhang , Yu Wei
2018, 29(11): 1689-1691  doi: 10.1016/j.cclet.2017.12.016
[Abstract](52) [FullText HTML] [PDF 936KB](4)
Abstract:
BiOI microspheres were synthesized via a facile hydrolytic method with sodium dodecyl sulfate (SDS). The results showed that 8% SDS-BiOI microspheres possessed the homogeneous morphology, larger specific surface area and more oxygen vacancies compared with the pure BiOI. Moreover, the adsorption efficiency of rhodamine B (RhB) and methyl orange (MO) for 8% SDS-BiOI reached almost 96.4% and 79.4%, respectively. It was found that the oxygen vacancy induced by SDS improved adsorption performance of BiOI due to the enhanced electrostatic interaction.
Polyimide-derived carbon nanofiber membranes as anodes for high-performance flexible lithium ion batteries
Fangyuan Zhao , Xin Zhao , Bo Peng , Feng Gan , Mengyao Yao , Wenjun Tan , Jie Dong , Qinghua Zhang
2018, 29(11): 1692-1697  doi: 10.1016/j.cclet.2017.12.015
[Abstract](66) [FullText HTML] [PDF 1059KB](3)
Abstract:
The strategy of N-doping in carbon materials could provide additional Li-ion storage sites to improve their electrochemical properties. Heteroatom-containing polymers could serve as good precursors to fabricate doped carbons due to the capability to in situ dope heteroatoms into the structures. In this work, electrospun heterocyclic polyimide (PI) nanofiber membranes containing biphenyl and pyrimidine rings were carbonized to fabricate freestanding and flexible heteroatoms-containing carbon membranes. When the polymer membranes were subjected to various calcination temperatures (from 550℃ to 950℃) and durations (0.5-10 h), the structural evolutions strongly affect their electrochemical properties as anodes for lithium ion batteries. It demonstrated that the reversible specific capacity of obtained sample treated at 650℃ for 3 h could achieve 695 mAh/g at 0.1 A/g and retain 245 mAh/g at 1.5 A/g after 300 cycles. Furthermore, the electrospun membrane maintains a good electrochemical performance at bending state as a flexible electrode.
S-doped graphene quantum dots as nanophotocatalyst for visible light degradation
Biting Huang , Jingbo He , Shiyue Bian , Chenjuan Zhou , Zhiyang Li , Fengna Xi , Jiyang Liu , Xiaoping Dong
2018, 29(11): 1698-1701  doi: 10.1016/j.cclet.2018.01.004
[Abstract](70) [FullText HTML] [PDF 865KB](4)
Abstract:
Graphene quantum dots (GQDs) recently emerge as the new and appealing nanophotocatalyst because of their low-cost, environmental compatibility and the ability to facilitate the charge migration and prolong the charge lifetimes. In this work, a visible photocatalyst of S-doped graphene quantum dots (S-GQDs) was prepared by a facile hydrothermal synthesis using 1, 3, 6-trinitropyrene and Na2S as precursors. The well crystallization and monodispersity as well as the chemical environment of S-GQDs were characterized by transmission electron microscopy, atom force microscopy and X-ray photoelectron spectrum. A superior photocatalytic performance of S-GQDs was demonstrated for degradation of basic fuchsin under visible light irradiation. Furthermore, the possible photocatalytic mechanism was proposed based on the trapping experiments of active species.
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