Organic derivatives of closo-boranes:: a new class of liquid crystal materials

被引：84

作者：

Kaszynski, P ^{[1
]}

Douglass, AG ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Chem, Organ Mat Res Grp, Nashville, TN 37235 USA

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1999年 / 581卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

liquid crystals; boron deltahedra; mesogens; nematic phases;

D O I：

10.1016/S0022-328X(99)00088-1

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

closo-Boranes and heteroboranes have been investigated as structural elements for liquid crystals. This paper reviews our progress to date in developing structure-property relationships for these boron cluster mesogens and assesses the effects of both steric and electronic influences on the liquid crystal behavior. The observation that nematic phases are favored over smectic phases is attributed principally to the steric effect of the clusters. Electronic and stereoelectronic effects can lead to materials exhibiting unusual properties. For example, compounds may exhibit high refractive indices yet low birefringence, they may be W-transparent or, in some cases, exhibit strong charge transfer interactions with pi-aromatic systems. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：28 / 38

页数：11

共 64 条

[11] 100 YEARS LIQUID-CRYSTAL CHEMISTRY [J].