substituent

The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer.

作者认为影响聚合物等规度因素主要是代基极性效应。

It was found that the sulphonamide group and the substituents on nitrogen atom within the molecule would effect the properties of these dyes.

坚牢度和光谱特性,发现磺酰胺基和它氮原子代基会影响该类染料性能。

The chromogenic responding ability increases as the substituent changes from phenyl to naphthyl or anthryl.

实验结果表明，氮基团引入改善了8-羟基喹啉生色能力，乙腈溶液中随着代基由苯基变为萘基和蒽基时，化合物吸收光谱发生红移。

These clusters show different fluxional behaviour and ligands according to various substituent around the metals of osmium.

根据羰基配体代基不同,该类簇合物中小分子移动种类及方式也有所不同。

The photodimerization reaction of an anthracene moiety in the smectic phase proceeded quantitatively and regioselectively.

【文摘】[GRAPHICS] Thermotropic liquid crystallinity can be induced for an anthracene having a dendritic substituent.

The aurone compounds are generally on one plane ,and they have a bigger conjugate system .The inducement of hydroxyl substituents has little influence on their own geometries .

橙酮类化合物分子共面性较强,为较大共轭体系,代羟基接入,对橙酮类化合物共面性影响不大。