共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
近几十年来,有机化学在深度和广度上已达到了一个新的水平. 我们认为在近代有机化学的发展中始终贯穿着二个基本特点,第一是数学和物理学越来越渗入,例如应用计算技术的新实验装置已彻底改变了有机化学结构分析的面目,而且亦使研究工作更为深入和定量;轨道对称守恒原理和前沿轨道理论等量子化学已成为有机化学家新的理论工具。第二个基本特征是生命过程的研究与有机化学密切连系,生物有机化学、生物无机化学、仿生化学、分子生物学等新的边缘学科,蓬勃发展。有机化学工作者正尝试用生命过程中进行的反应来改进原有的有机化学。近代物理有机化学的进展也正从一个重要 相似文献
3.
4.
5.
化妆品技术专业的教学目标重在培养化妆品技术与美容方向人才,该专业的学习需要有机化学知识理论为支撑,学习有机化合物的性质、制备方法和有机反应等能深化学生对化妆品技术的了解,也为之后的其他专业课程的学习做准备。有机化学教学采用传统模式结合慕课、微课等现代化手段,以获得最佳的教学质量。 相似文献
6.
7.
结合有机化学教材内容总结了有机化学领域的诺贝尔化学奖情况,分析了诺贝尔化学奖与有机化学及生物科学的关系,并介绍了在生物专业有机化学教学中引入诺贝尔化学奖的方法。将诺贝尔化学奖引入生物专业有机化学的教学实践有利于学生认识课程重要性,激发学习动力,提高综合素质和创新能力。 相似文献
8.
9.
高等林业院校有机化学实验教学改革初探 总被引:4,自引:0,他引:4
通过改革基础有机化学实验课教学内容,本科生有机化学实验技能的强化训练,开设综合性实验──有机化学大实验的实施与实践,对高等林业院校有机化学实验教学改革进行了初步探索。 相似文献
10.
通过对有机化学命名法演变历程的分析与研究,系统地介绍了在我国现代有机化学系统命名法建立过程中起到奠基性作用的4大发展阶段——江南制造局的有机化学译名、虞和钦的有机化学命名、科学名词审查会的有机化学名词、国立编译馆的《化学命名原则》。 相似文献
11.
钐试剂在有机合成中的应用 总被引:4,自引:0,他引:4
钐试剂在有机合成中的应用是近年来有机合成方法学研究中的热点之一。综述了十余年来本课题组在钐试剂应用于有机合成方面所开展的有关工作:(1)二碘化钐作为偶联剂和还原剂在有机合成中的应用;(2)金属钐直接应用于有机合成;(3)三碘化钐作为路易斯酸应用于有机合成;(4)有机钐试剂在有机合成中的应用。 相似文献
12.
There has been extensive research on the development of organic optoelectronic devices, such as organic light‐emitting diodes, organic field‐effect transistors, and organic solid‐state lasers from various viewpoints, ranging from basic studies to practical applications. As organic materials are used as solids in these devices, the importance of organic chromophores that exhibit intense emissions of visible light in the solid state is greatly increasing in the field of organic electronics. However, highly efficient emission from organic solids is very difficult to attain because most organic emitting materials strongly tend to cause concentration quenching of the luminescence in the condensed phase. Therefore, in order to generate and improve organic optoelectronic devices, it is necessary to design novel chromophores that exhibit superior solid‐state emission performance. This Focus Review covers the recent development of highly emissive organic small molecules whose photoluminescence quantum yields in the solid state have been reported. Following the introduction, the photophysical processes of excited molecules are briefly reviewed. Subsequently, organic solid fluorophores are described with an emphasis on the characteristics of their molecular structures. 相似文献
13.
14.
15.
Dr. Julie Broggi Prof. Dr. Thierry Terme Prof. Dr. Patrice Vanelle 《Angewandte Chemie (International ed. in English)》2014,53(2):384-413
One‐electron reduction is commonly used in organic chemistry for the formation of radicals by the stepwise transfer of one or two electrons from a donor to an organic substrate. Besides metallic reagents, single‐electron reducers based on neutral organic molecules have emerged as an attractive novel source of reducing electrons. The past 20 years have seen the blossoming of a particular class of organic reducing agents, the electron‐rich olefins, and their application in organic synthesis. This Review gives an overview of the different types of organic donors and their specific characteristics in organic transformations. 相似文献
16.
17.
Xiaolong Liu Dr. Kang Wang Ang Ren Tongjin Zhang Shizhe Ren Prof. Jiannian Yao Prof. Haiyun Dong Prof. Yong Sheng Zhao 《Angewandte Chemie (International ed. in English)》2023,62(40):e202309386
Stimulated Raman scattering offers an alternative strategy to explore continuous-wave (c.w.) organic lasers, which, however, still suffers from the limitation of inadequate Raman gain in organic material systems. Here we propose a metal-linking approach to enhance the Raman gain of organic molecules. Self-assembled microcrystals of the metal linked organic dimers exhibit large Raman gain, therefore allowing for c.w. Raman lasing. Furthermore, broadband tunable Raman lasing is achieved in the organic dimer microcrystals by adjusting excitation wavelengths. This work advances the understanding of Raman gain in organic molecules, paving a way for the design of c.w. organic lasers. 相似文献
18.
This paper intends to provide an overview for using corannulene derivatives in organic electronics such as organic field-effect transistors (OFETs), organic solar cells (OSCs), and organic light-emitting diodes (OLEDs). We highlight the rational design strategies, tuning molecular orbital energy levels and arrangement in single crystals of corannulenes. The topological structure and properties of corannulene make it a unique candidate for organic electronics. 相似文献
19.
聚氯乙烯(PVC)的有机辅助稳定剂包括含N有机稳定剂、含P有机稳定剂、含O有机稳定剂、含S有机稳定剂等四种类型。其中含O有机稳定剂和含S有机稳定剂对改善PVC初期着色和长期稳定性效果显著,是PVC的有机辅助稳定剂发展的重要方向。文章介绍了PVC的有机辅助稳定剂的作用机理及应用进展。 相似文献
20.
Sanyo Hamai 《Journal of inclusion phenomena and macrocyclic chemistry》2009,63(1-2):77-86
The interactions of an organic anion, 1-pyrenesulfonate (PS), with γ-cyclodextrin (γ-CD) and organic cations such as quaternary ammonium compounds (or organic anions such as 1-decanesulfonate) have been examined by means of absorption and fluorescence spectroscopy. At a low concentration of PS, γ-CD forms a 1:1 inclusion complex with PS. PS forms organic cation–organic anion complexes with quaternary ammonium compounds. The organic cation–organic anion complexes of PS form ternary inclusion complexes with γ-CD. Equilibrium constants for the formation of these complexes have been evaluated from the fluorescence intensity change. As an alkyl chain in the quaternary ammonium compound is lengthened, the equilibrium constant for the formation of the ternary inclusion complex is increased. Although PS does not form complexes with organic anions such as 1-decanesulfonate, the organic anions are bound to the γ-CD cavity accommodating a PS molecule to form ternary inclusion complexes. However, the equilibrium constants for the organic anions (1-decanesulfonate etc.) are significantly less than those for the quaternary ammonium compounds. The small equilibrium constants for the organic anions can be ascribed to the electrostatic repulsion between PS and the organic anions. 相似文献