TRIPHENANTHRO-ANELLATED [18]ANNULENES WITH ALKOXY SIDE-CHAINS - A NOVEL CLASS OF DISCOTIC LIQUID-CRYSTALS

被引：29

作者：

KRETZSCHMANN, H ^{[1
]}

MULLER, K ^{[1
]}

KOLSHORN, H ^{[1
]}

SCHOLLMEYER, D ^{[1
]}

MEIER, H ^{[1
]}

机构：

[1] UNIV MAINZ,INST ORGAN CHEM,D-55099 MAINZ,GERMANY

来源：

CHEMISCHE BERICHTE | 1994年 / 127卷 / 09期

关键词：

18]ANNULENES; LIQUID CRYSTALS; DISCOTIC;

D O I：

10.1002/cber.19941270925

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two different types 6 and 16 of [18]annulenes condensed with phenanthrene systems were prepared by cyclocondensation reactions (Schemes 2 and 3). The central 18-membered rings do not show a macrocyclic diamagnetic ring current. Conformational analyses and X-ray analyses in the solid state reveal non-planar structures in which aromatic ''islands'' are connected by (E)-configurated olefinic bridges. The introduction of long alkoxy side chains yields a new class of discotic liquid crystals; either ND or hexagonal columnar phases are generated, which were characterized by DSC, microscopy with polarized light, and small-angle scanning X-ray.

引用

页码：1735 / 1745

页数：11

共 29 条

[1] PHOTOPHYSICAL AND THEORETICAL-STUDIES OF PHOTOISOMERISM AND ROTAMERISM OF TRANS-STYRYLPHENANTHRENES [J].