二溴羧基偶氮胂测定铜

二溴羧基偶氮胂测定铜谢治民，欧阳则明，龙有前（湖南湘潭机电专科学校，４１１１０１）二溴羧基偶氮胂是测定稀土的高灵敏的新显色试剂￣［１］，我们用二溴羧基偶氮胂用于铜的试验，结果发现在ｐＨ８磷酸氢二钠－柠檬酸的缓冲介质中有良好的显色反应，配合物在波长５８...     

Synthesis of Novel Dendrimers Containing Amino Acids and Peptides

Dendrimers are known for their well-defined, regular, highly branched architectures with a large number of functional groups1. Recently, dendrimers have been widely researched in different fields, such as molecular light havesting, catalysts, liquid cryst…     

用氧化数法确定Cahn—Ingold—Prelog规则中有机基团顺序大小

在确定有机化合物Z、E及R、S立体异构体时,总要涉及到有机基团的顺序大小问题.简单的CH_3-,C_2H_5-,OH-,X等一般可一目了然,而较为复杂的基团则需将结构式按H HCahn-Ingold-Prelog规则一一展开来比较.例如乙烯基-CH=CH_2展开为??;     

钇与2-(4′-氯-2′-膦酰基一苯偶氮)-7-(2′,6′-二溴-4′-氯-一苯偶氮)-1,8-二羟基-3,6-萘二磺酸配位反应动力学研究和机理探讨

用停流分光光度法获得反应的经验速率方程为R=k[y(H_2O~n)~(3+)]·[H_6R]·[H~+]~(-1)。参考Eigen-Tamm机理和测得的动力学参数,拟出了反应的可能机理。     

Dendritic Macroinitiator for the Ring—Opening Polymerization of γ—Benzyl L—Glutamate N—Carboxyanhydride

Much effort has been dedicated to the molecular design and synthesis of model proteins to define protein folding interactions and to develop protein-based materials. Among them, the ring-opening polymerization of -amino acid-N-carboxyanhy- drides (NCAs) has drawn much attention because the resulting artificial polypeptides have wide applications in biotechnology, biomineralization and diagnostics1, 2. It is well known that dendrimers are hyperbranched macromolecules possessing a very high co…     

含羧基/环氧树脂的丙烯酸酯共聚物乳液的制备和交联——1.含羧基丙烯酸酯共聚物乳液的分子设计和制备

以在低温下(<100℃)实现含羧基/环氧树脂的丙烯酸酯共聚物乳液的交联固化为目的,进行了分子设计;估算了共聚物的组成,用碱滴定法测定了乳胶粒表面的羧基数,并比较了不同单体配比所得乳液的成膜性能.     

一种西佛碱侧链型液晶高分子的合成及表征

一种西佛碱侧链型液晶高分子的合成及表征邹友思，林国良，姚青青，戴李宗，潘容华（厦门大学化学系厦门３６１００５）关键词联苯，西佛碱，侧链型，液晶高分子，基团转移聚合Ｆｉｎｋｅｌｌｎａｎｎ等提出的柔性基去偶合概念’］已在侧链型液晶高分子的研究中得到了证实...     

高分子化学课程中若干论题的进展

高分子化学课程中下列五个论题被加以修正和补充:(1)1,2-二取代乙烯单体的聚合;(2)乙烯基单体聚合时的键连方式;(3)自由基聚合的自动加速;(4)引发转移和引发转移终止剂;(5)氢转移聚合和基因转移聚合。     

Novel Phenomenon of Oxygen-to-oxygen Silyl Migration in Directed Aldol Reaction

The phenomenon of migration of the silyl groups from α-oxygen to β-oxygen in sodium aldol reaction was observed for the first time in this paper.