THERMALLY INDUCED INVERSION OF THE CHOLESTERIC SENSE IN LYOTROPIC POLYPEPTIDE LIQUID-CRYSTALS

被引：45

作者：

TORIUMI, H

KUSUMI, Y

UEMATSU, I

UEMATSU, Y

机构：

[1] TOKYO INST TECHNOL, DEPT POLYMER TECHNOL, 2-12-1 OOKAYAMA, MEGURO KU, TOKYO 152, JAPAN

[2] TOKYO INST POLYTECH, FAC ENGN, ATSUGI, KANAGAWA 24302, JAPAN

来源：

POLYMER JOURNAL | 1979年 / 11卷 / 11期

关键词：

Cholesteric sense; Hydrogen bond; Inversion; Liquid crystal; Pitch; Poly(y-benzyl l-glutamate); Polypeptide; W-cresol;

D O I：

10.1295/polymj.11.863

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermally induced inversion of the cholesteric sense has been found in lyotropic polypeptide liquid crystals. The cholesteric sense of poly(γ-benzyl L-glutamate) liquid crystal in m-cresol (17 vol%) inverts from right to left at 60°C, and the reciprocal of the cholesteric pitch changes linearly with temperature. The compensated liquid crystalline solution at 60°C shows no helical twist. Similar phenomena are found for poly(γ-benzyl L-glutamate) in benzyl alcohol and for poly(γ-propyl L-glutamate) in m-cresol. The solvent effect on the helical twisting power is discussed in the light of the fact that the side-chain ester groups of poly(γ-benzyl L-glutamate) form hydrogen bonds with the hydroxyl groups of m-cresol. © 1979 The Society of Polymer Science, Japan.

引用

页码：863 / 869

页数：7

共 21 条

[1] THE STABILITY AND SCREW SENSE OF THE ALPHA-HELIX IN POLY-BETA-BENZYL-L-ASPARTATE [J].