教学课程资源库 更多>>

关键词： Catalysts  

摘要： Single-atom catalysts, providing 100% metal dispersion and maximized metal utilization, have recently emerged as a new class of catalysts for chemical and electrochemical reactions, with great potential for industrial catalysis in the future. The current key challenges in this field include how to develop scalable and economically viable approaches to synthesize highly active, selective and stable catalysts and how to further extend their applications in organic synthesis with high value-creation using these single-atom catalysts. In this review, we summarize recent advances in the field of single-atom catalysts, emphasizing on unique catalyst design strategies. A thorough discussion of the atomic and electronic structures of single-atom catalysts is presented to provide fundamental insights into their catalytic performances. The application of single-atom catalysts in organic chemistry is comprehensively discussed. Finally, the opportunities, challenges and potential applications of single-atom catalysts are addressed.

关键词： 项目教学法   高中有机化学教学   应用原则   应用措施  

摘要： 文章主要介绍了高中有机化学教学中应用项目教学法所坚持的原则,指出项目教学法在高中有机化学教学中的具体应用措施,以期为提高高中有机化学教学的质量提供有价值的参考。

关键词： Oxidation reactions   Transfer reactions   Chemical reactions   Cyclization   Electrodes  

摘要： While organic electrochemistry can look quite different to a chemist not familiar with the technique, the reactions are at their core organic reactions. As such, they are developed and optimized using the same physical organic chemistry principles employed during the development of any other organic reaction. Certainly, the electron transfer that triggers the reactions can require a consideration of new "wrinkles" to those principles, but those considerations are typically minimal relative to the more traditional approaches needed to manipulate the pathways available to the reactive intermediates formed downstream of that electron transfer. In this review, three very different synthetic challenges-the generation and trapping of radical cations, the development of site-selective reactions on microelectrode arrays, and the optimization of current in a paired electrolysis-are used to illustrate this point.

关键词： Mass transfer   Electrolytic cells   Electrodes   Electrochemical cells   Electrolysis  

摘要： Electrosynthesis has much to offer to the synthetic organic chemist. But in order to be widely accepted as a routine procedure in an organic synthesis laboratory, electrosynthesis needs to be presented in a much more user-friendly way. The literature is largely based on electrolysis in a glass beaker or H-cells that often give poor performance for synthesis with a very slow rate of conversion and, often, low selectivity and reproducibility. Flow cells can lead to much improved performance. Electrolysis is participating in the trend toward continuous flow synthesis, and this has led to a number of innovations in flow cell design that make possible selective syntheses with high conversion of reactant to product with a single passage of the reactant solution through the cell. In addition, the needs of the synthetic organic chemist can often be met by flow cells operating with recycle of the reactant solution. These cells give a high rate of product formation while the reactant concentration is high, but they perform best at low conversion. Both approaches are considered in this review and the important features of each cell design are discussed. Throughout, the application of the cell designs is illustrated with syntheses that have been reported.

关键词： 中国化学会   文情   古诗   终身成就奖   有机化学   50年代   获奖者   不对称  

摘要： 得悉中国化学会终身成就奖首次颁出，上海有机化学所戴立信院士成为首位获奖者，真为他高兴。跟年轻朋友谈起，大家都佩服他从上世纪50年代参与金霉素提取，到后来开拓不对称合成研究等，说他如今获奖是实至名归。

关键词： 有机化学   食品安全   食品添加剂  

摘要： 本文剖析了我国有机化学在食品中的失败运用案例的基础上提出了面对有机化学运用在食品中的安全问题,相关部门应采取的措施。旨在呼吁食品加工企业能将人们的生命安全放在首位,做到以人为本,将有机化学会和食品完美地结合,还人民一份食品的安全感。

关键词： 高职有机化学   自主学习   教学模式   构建策略  

摘要： 高职院校作为我国教育事业中的重要组成部分,随着新课程改革的不断发展与深入,高职院校的教学也受到极大的影响。在高职院校的有机化学教学过程中,教师更加注重培养学生的自主学习意识以及自主学习能力,从而使学生受益终身。因此,本文分析了高职有机化学自主学习教学模式的意义,以及现阶段高职院校有机化学教学现状,同时提出了高职有机化学自主学习教学模式构建策略,希望以此为有效推动高职有机化学教学质量不断提升。

关键词： 虚拟仿真   Flash   有机化学实验   实验教学  

摘要： 高校有机化学实验由于其特殊性,在安全问题上存在着很大的风险。采用计算机虚拟模拟化学实验过程,可以保障在安全的环境下,激发学生兴趣,提高教学效果。通过分析虚拟仿真技术在实验教学中的必要性和优势,概括现代虚拟仿真技术种类,并以乙酰水杨酸的制备实验为例,通过制作具有交互性的flash动画及形成完整课件的心得,初探虚拟仿真技术在有机化学实验教学中的可实施性。

关键词： 有机化学实验   教学改革   教学质量  

摘要： 通过有机化学实验培养学生的科研和创新能力、树立实验室安全、环保意识、提高实验技能是高校有机化学实验课程改革的重点。结合长江师范学院化学化工学院的实际情况,通过对有机化学实验教学内容、教学方法以及考核方式三方面的改革,有效的提高了学生对有机化学实验的重视程度、动手能力和独立思考能力,增强了学生的环保意识,提高了教学质量。