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2017 Volume 32 Issue 12
2017, 32(12): 1-11
doi: 10.3866/PKU.DXHX201706036
Abstract:
Constructed mainly via Friedel-Crafts alkylation reaction, hypercrosslinked polymers (HCPs) possess significant advantages, such as easy to synthesize, porous, non-toxic, structurally stable and lightly weighted. This paper briefly describes the general reaction conditions and mechanism of the conversion. Meanwhile, the synthesis strategy of some HCP materials and their diverse applications in gas adsorption/separation, water-treatment, catalysis, and sensing etc. are also be displayed here. Additionally, we point out the further combination between Friedel-Crafts alkylation reaction and HCPs in the future.
Constructed mainly via Friedel-Crafts alkylation reaction, hypercrosslinked polymers (HCPs) possess significant advantages, such as easy to synthesize, porous, non-toxic, structurally stable and lightly weighted. This paper briefly describes the general reaction conditions and mechanism of the conversion. Meanwhile, the synthesis strategy of some HCP materials and their diverse applications in gas adsorption/separation, water-treatment, catalysis, and sensing etc. are also be displayed here. Additionally, we point out the further combination between Friedel-Crafts alkylation reaction and HCPs in the future.
2017, 32(12): 12-16
doi: 10.3866/PKU.DXHX201708022
Abstract:
In the coexistence period of "internet + education" and traditional education, micro lectures are integrated into traditional classroom and will transition to MOOCs and flipped classroom gradually. The basic courses are combined with major courses to construct a new analytical chemistry course group system. The teaching contents of the courses are restructured and optimized. The subject thought is imparted. The learning interest in major of college students and the teaching quality are improved.
In the coexistence period of "internet + education" and traditional education, micro lectures are integrated into traditional classroom and will transition to MOOCs and flipped classroom gradually. The basic courses are combined with major courses to construct a new analytical chemistry course group system. The teaching contents of the courses are restructured and optimized. The subject thought is imparted. The learning interest in major of college students and the teaching quality are improved.
2017, 32(12): 17-20
doi: 10.3866/PKU.DXHX201704016
Abstract:
By designing and carrying out a series of methods of course examination meticulously, including asking and answering questions, doing homework, unit practice and group discussion (WeChat included), we could adjust teaching schedule and improve teaching methods timely; students realize method of learning university chemistry and can master essence of knowledge by participating the course examination.
By designing and carrying out a series of methods of course examination meticulously, including asking and answering questions, doing homework, unit practice and group discussion (WeChat included), we could adjust teaching schedule and improve teaching methods timely; students realize method of learning university chemistry and can master essence of knowledge by participating the course examination.
2017, 32(12): 21-24
doi: 10.3866/PKU.DXHX201708009
Abstract:
In the engineering inorganic chemistry course, the contents of structure of matter are very important. Because of the characteristics of structure of matter, such as high abstraction and logic, teaching this section becomes difficult in this course. This article makes an investigation on the differences in teaching contents between high school chemistry and engineering inorganic chemistry. Furthermore, some effective teaching methods including model-assisting teaching, employment of multimedia, history of discipline teaching and inquiry teaching have been explored in this article, which will be beneficial to the promotion of teaching effect of the related contents.
In the engineering inorganic chemistry course, the contents of structure of matter are very important. Because of the characteristics of structure of matter, such as high abstraction and logic, teaching this section becomes difficult in this course. This article makes an investigation on the differences in teaching contents between high school chemistry and engineering inorganic chemistry. Furthermore, some effective teaching methods including model-assisting teaching, employment of multimedia, history of discipline teaching and inquiry teaching have been explored in this article, which will be beneficial to the promotion of teaching effect of the related contents.
2017, 32(12): 25-30
doi: 10.3866/PKU.DXHX201708018
Abstract:
This paper introduces the practice of physical chemistry laboratory teaching mode reform based on the Learning Pyramid in Northeast Forestry University. By using"students preview on the online experiment video","students lectured the experiment to other students","student group discussion before operation" and "students group summary discussion after operation", a more effective laboratory teaching mode of "student-centered" is established. The teaching practice proves that it is an effective route to cultivate the comprehensive quality and the independent innovation ability of students.
This paper introduces the practice of physical chemistry laboratory teaching mode reform based on the Learning Pyramid in Northeast Forestry University. By using"students preview on the online experiment video","students lectured the experiment to other students","student group discussion before operation" and "students group summary discussion after operation", a more effective laboratory teaching mode of "student-centered" is established. The teaching practice proves that it is an effective route to cultivate the comprehensive quality and the independent innovation ability of students.
2017, 32(12): 31-34
doi: 10.3866/PKU.DXHX201706018
Abstract:
The rapid development of information technology provides good opportunities and challenges for higher education. In this paper, the authors present some ideas based on the educational reform and blueprint of the agricultural university public fundamental course, Basic Chemistry Laboratory (I). Under the condition of the interaction between Internet and information technology, the authors discuss the problems of the university public curriculum, the necessity and urgency of teaching reform. Also, there are many feasible plans and suggestions on education conception transformation, course construction, instructional resource construction and curriculum assessment steps for the education reform.
The rapid development of information technology provides good opportunities and challenges for higher education. In this paper, the authors present some ideas based on the educational reform and blueprint of the agricultural university public fundamental course, Basic Chemistry Laboratory (I). Under the condition of the interaction between Internet and information technology, the authors discuss the problems of the university public curriculum, the necessity and urgency of teaching reform. Also, there are many feasible plans and suggestions on education conception transformation, course construction, instructional resource construction and curriculum assessment steps for the education reform.
2017, 32(12): 35-40
doi: 10.3866/PKU.DXHX201707025
Abstract:
The concept and achievements of asymmetric catalysis can be introduced into the teaching process of organic chemistry to facilitate the teaching of stereochemistry. Via this approach, the students can better understand the asymmetric catalytic reaction and the stereochemistry. The practice of scientific presentations and research activities can not only help to consolidate the theoretical knowledge, but also allow students to develop their academic accomplishment and the ability of scientific research.
The concept and achievements of asymmetric catalysis can be introduced into the teaching process of organic chemistry to facilitate the teaching of stereochemistry. Via this approach, the students can better understand the asymmetric catalytic reaction and the stereochemistry. The practice of scientific presentations and research activities can not only help to consolidate the theoretical knowledge, but also allow students to develop their academic accomplishment and the ability of scientific research.
2017, 32(12): 41-47
doi: 10.3866/PKU.DXHX201708002
Abstract:
An increasing amount of novel protein lysine post-translational modifications (PTMs) have been gradually discovered. These PTMs with a large structural diversity widely exist in human proteome, which play an important epigenetically regulatory function to the chromatin structure and gene expression. This manuscript will briefly summarize the discovery and structure properties of the lysine PTMs from a chemical point of view, which will further benefit to teaching and research.
An increasing amount of novel protein lysine post-translational modifications (PTMs) have been gradually discovered. These PTMs with a large structural diversity widely exist in human proteome, which play an important epigenetically regulatory function to the chromatin structure and gene expression. This manuscript will briefly summarize the discovery and structure properties of the lysine PTMs from a chemical point of view, which will further benefit to teaching and research.
2017, 32(12): 48-52
doi: 10.3866/PKU.DXHX201707002
Abstract:
Based on the conventional safety education and management methods, a series of innovation and practice were carried out in recent years. The safe environment in laboratory, the construction of Massive Open Online Course (MOOC) for safety education, and the application of green chemistry in chemistry laboratory teaching were introduced in this paper.
Based on the conventional safety education and management methods, a series of innovation and practice were carried out in recent years. The safe environment in laboratory, the construction of Massive Open Online Course (MOOC) for safety education, and the application of green chemistry in chemistry laboratory teaching were introduced in this paper.
2017, 32(12): 53-59
doi: 10.3866/PKU.DXHX201704010
Abstract:
First, 8-hydroxyquinoline(HQ) was synthesized by the Skraup method, which involves basic skills of organic chemistry experiment such as reflux heating, steam distillation, crystallization and recrystallization. Secondly, the synthesized 8-hydroxyquinoline was used to prepare AlQ3 in which Al content was measured by back titration. Finally, infrared spectra, hydrogen nuclear magnetic resonance spectra, UV-Vis absorption spectra and fluorescence emission spectra of 8-hydroxyquinoline as well as AlQ3 were measured. This experiment covers synthesis, characterization and performance testing, facilitating students to understand and complete a basic research process.
First, 8-hydroxyquinoline(HQ) was synthesized by the Skraup method, which involves basic skills of organic chemistry experiment such as reflux heating, steam distillation, crystallization and recrystallization. Secondly, the synthesized 8-hydroxyquinoline was used to prepare AlQ3 in which Al content was measured by back titration. Finally, infrared spectra, hydrogen nuclear magnetic resonance spectra, UV-Vis absorption spectra and fluorescence emission spectra of 8-hydroxyquinoline as well as AlQ3 were measured. This experiment covers synthesis, characterization and performance testing, facilitating students to understand and complete a basic research process.
2017, 32(12): 60-68
doi: 10.3866/PKU.DXHX201706012
Abstract:
A research-oriented comprehensive experiment, "fabrication, characterization and photocatalytic performance of N,F-codoped TiO2 nanotubes", was performed in Summer Research Training Program of Nankai University. Hydrogen titanate nanotubes prepared by hydrothermal method were impregnated by titanium sol containing NH4F to fabricate N,F-codoped TiO2 nanotubes (N,F/TiO2 NTs). The prepared catalysts were characterized by TEM, XRD, TG-DTA, XPS and UV-Vis DRS. By using methyl orange solution as simulated wastewater, the photocatalytic activities of the prepared materials under UV light and simulated sunlight were monitored. Through this comprehensive experiment related to research frontier, the students can obtain basic research training and their scientific literacy can be improved.
A research-oriented comprehensive experiment, "fabrication, characterization and photocatalytic performance of N,F-codoped TiO2 nanotubes", was performed in Summer Research Training Program of Nankai University. Hydrogen titanate nanotubes prepared by hydrothermal method were impregnated by titanium sol containing NH4F to fabricate N,F-codoped TiO2 nanotubes (N,F/TiO2 NTs). The prepared catalysts were characterized by TEM, XRD, TG-DTA, XPS and UV-Vis DRS. By using methyl orange solution as simulated wastewater, the photocatalytic activities of the prepared materials under UV light and simulated sunlight were monitored. Through this comprehensive experiment related to research frontier, the students can obtain basic research training and their scientific literacy can be improved.
2017, 32(12): 69-73
doi: 10.3866/PKU.DXHX201706027
Abstract:
A sensitive method based on the sodium dodecyl sulfate-stabilized silver nanoparticles (SDS-AgNPs) for detection of levofloxacin was reported. Levofloxacin could rapidly induce the aggregation of SDS-AgNPs, thereby resulting in a yellow-to-red color change. The color change could be monitored by naked eye and UV-Vis spectrophotometry. The presented method is convenient, simple, cost-effective and suitable for comprehensive laboratory teaching to develop students' innovation and scientific research ability.
A sensitive method based on the sodium dodecyl sulfate-stabilized silver nanoparticles (SDS-AgNPs) for detection of levofloxacin was reported. Levofloxacin could rapidly induce the aggregation of SDS-AgNPs, thereby resulting in a yellow-to-red color change. The color change could be monitored by naked eye and UV-Vis spectrophotometry. The presented method is convenient, simple, cost-effective and suitable for comprehensive laboratory teaching to develop students' innovation and scientific research ability.
2017, 32(12): 74-78
doi: 10.3866/PKU.DXHX201707013
Abstract:
The experiment of hexamine cobalt(Ⅲ) chloride preparation is a comprehensive inorganic chemistry experiment, several kinds of harmful volatile reagents are used, such as concentrated hydrochloric acid, ammonia, hydrogen peroxide solution. So we explore the reaction condition to improve synthesis method. The concentration of hydrochloric acid has been decreased, the efficient value of which ranges from 3.0 mol·L-1 to 6.0 mol·L-1. The improvements of preparing[Co(NH3)6]Cl3 are rarely reported.
The experiment of hexamine cobalt(Ⅲ) chloride preparation is a comprehensive inorganic chemistry experiment, several kinds of harmful volatile reagents are used, such as concentrated hydrochloric acid, ammonia, hydrogen peroxide solution. So we explore the reaction condition to improve synthesis method. The concentration of hydrochloric acid has been decreased, the efficient value of which ranges from 3.0 mol·L-1 to 6.0 mol·L-1. The improvements of preparing[Co(NH3)6]Cl3 are rarely reported.
2017, 32(12): 79-83
doi: 10.3866/PKU.DXHX201707017
Abstract:
In this work we discuss the content and the order of stereochemistry in organic chemistry textbooks for undergraduate students, and especially emphasize the importance of stereochemistry in organic chemistry curriculum. We elaborate an opinion about the classification of stereoisomers. Based on the discussion about the scope of isomers, as well as the relationship between the structure of organic molecules and their charactes, we give an advice on how to teach and learn well the topics of stereochemistry.
In this work we discuss the content and the order of stereochemistry in organic chemistry textbooks for undergraduate students, and especially emphasize the importance of stereochemistry in organic chemistry curriculum. We elaborate an opinion about the classification of stereoisomers. Based on the discussion about the scope of isomers, as well as the relationship between the structure of organic molecules and their charactes, we give an advice on how to teach and learn well the topics of stereochemistry.
2017, 32(12): 84-101
doi: 10.3866/PKU.DXHX201707032
Abstract:
