A STUDY ON CONFORMATIONAL STRUCTURE OF MODEL COMPOUND OF NOVEL SIDE CHAIN LIQUID CRYSTALLINE POLYMER BY USING HIGH RESOLUTION SOLID STATE 13C-NMR

被引：0

作者：

杨小震

陆群

冯立文

朱善农

机构：

[1] Academia Sinica

[2] Beijing 100080

[3] Institute of Chemistry

[4] Polymer Physics Laboratory

来源：

Chinese Journal of Polymer Science | 1993年 / 02期

关键词：

Conformation; 13C NMR; Liquid crystal; 1,4- bis[4-heptyloxybenzoyloxy]-benzene;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

;C-NMR chemical shifts of model compound of a novel side chain liquid crystalline polymer, poly 2.5-his （4-alkoxybenzoyloxy） styrene , have been assigned in this study. Moreover, by using high-resolution solid-state CP/MAS （cross polarization/magic angle spinning） technique, the spectrum shows that in the crystalline state the ester linkage has a conformation nearly perpendicular to the either side of ring planes, and that the alkoxy groups are not fully in zigzag form. The possible conformational changes around the mesogens from the solid state to the mesophase are discussed.

引用

页码：115 / 120

页数：6