DISCOTIC CHARGE-TRANSFER TWINS - STRUCTURE AND MESOPHASE BEHAVIOR OF COVALENTLY LINKED TRIPHENYLENES AND TRINITROFLUORENONES

被引：54

作者：

MOLLER, M

TSUKRUK, V

WENDORFF, JH

BENGS, H

RINGSDORF, H

机构：

[1] DEUTSCH KUNSTSTOFF INST DARMSTADT,SCHLOSSGARTENSTR 6,W-6100 DARMSTADT,GERMANY

[2] UNIV MAINZ,INST ORGAN CHEM,W-6500 MAINZ,GERMANY

[3] ACAD SCI UKSSR,INST BIOORGAN CHEM,KIEV 2531601,UKRAINE,USSR

来源：

LIQUID CRYSTALS | 1992年 / 12卷 / 01期

关键词：

D O I：

10.1080/02678299208029035

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Discotic charge transfer twins, a novel class of discotic liquid-crystalline compounds were studied. These compounds consist of triphenylene units (as donors) which are chemically linked via flexible spacers of various lengths to trinitrofluorenone units (acting as acceptor). They display a liquid-crystalline phase over a wide temperature range extending up to 240-260-degrees-C. Based on X-ray analysis a structural model is proposed for the liquid-crystalline phase: the molecules are arranged in columns in such a way that mixed stacks occur, the intercolumnar packing possesses an orthorhombic symmetry. The neighbouring columns are connected along specific directions via flexible spacers which give rise to highly anisotropic structural properties of this columnar liquid-crystalline phase.

引用

页码：17 / 36

页数：20