CHIROCHROMISM-PHOTOCHROMISM BY EPIMERIZATION - SEARCH FOR A LIQUID-CRYSTAL PHOTOTRIGGER

被引：55

作者：

ZHANG, MB ^{[1
]}

SCHUSTER, GB ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT CHEM,ROGER ADAMS LAB,URBANA,IL 61801

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 1994年 / 116卷 / 11期

关键词：

D O I：

10.1021/ja00090a033

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new class of photochromic reactions was investigated as a possible trigger for phase transitions in liquid crystals. Chirochromic compounds have two chiral units. One unit is fixed, and the other can be switched with light. A series of diastereomeric compounds based on ketals and acetals of 1,1'-bi-2-naphthol was prepared. In some cases, the absorption spectra of the diastereomers are measurably different. The ketals do not undergo efficient photoepimerization, apparently because the activation barrier for atropisomerism in their triplet state has increased. However, certain of the acetal derivatives do photoepimerize and are chirochromic. These compounds may be developed into triggers.

引用

页码：4852 / 4857

页数：6

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