Terminal Chains as a Tool To Modulate the Properties of Bent-Core Liquid Crystals

被引：24

作者：

Gimeno, Nelida ^{[1
]}

Barbera, Joaquin ^{[1
]}

Luis Serrano, Jose ^{[1
]}

Blanca Ros, M. ^{[1
]}

Rosario de la Fuente, M. ^{[2
]}

Alonso, Ibon ^{[3
]}

Folcia, Cesar L. ^{[3
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Fac Ciencias, E-50009 Zaragoza, Spain

[2] Univ Basque Country, Fac Ciencias & Tecnol, Dept Fis Aplicada 2, E-48080 Bilbao, Spain

[3] Univ Basque Country, Fac Ciencias & Tecnol, Dept Fis Mat Condensada, E-48080 Bilbao, Spain

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 19期

关键词：

NONLINEAR-OPTICAL PROPERTIES; POLAR ORDER; SHAPED MOLECULES; SUPERSTRUCTURAL CHIRALITY; MESOMORPHIC BEHAVIOR; MESOGENS; PHASES; DESIGN; AZO; 2,7-DIHYDROXYNAPHTHALENE;

D O I：

10.1021/cm901678q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Two series of bent-shaped liquid crystals derived from 4,4'-diphenylmethane and 3,4'-biphenylene moieties have been prepared and studied. The research, focused on the effect of the terminal chains on the mesogenic properties of bent-core compounds, demonstrates that they can be used as a tool to control their liquid crystal behavior. Together with achiral and chiral alkoxy tails, thioalkoxy chains and unusual terminal structures on bent-core mesogens such as oxyethylene moieties or unsaturated tails of different lengths have been investigated. Mesomorphism as well as dielectric responses of the new materials are reported and discussed in light of structural considerations. Interesting results concerning lowering of transition temperatures, mesophase vitrification, or columnar-lamellar sequences have been achieved by the incorporation of these terminal chains.

引用

页码：4620 / 4630

页数：11

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