Synthesis of new wide nematic diaryl-diacetylenes containing thiophene-based heteromonocyclic and heterobicyclic structures, and their birefringence properties

被引：30

作者：

Arakawa, Yuki ^{[1
]}

Kang, Sungmin ^{[1
]}

Nakajima, Shunpei ^{[1
]}

Sakajiri, Koichi ^{[1
]}

Kawauchi, Susumu ^{[1
]}

Watanabe, Junji ^{[1
]}

Konishi, Gen-ichi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Tokyo 152, Japan

来源：

LIQUID CRYSTALS | 2014年 / 41卷 / 05期

关键词：

birefringence; thiophene; nematic phase; diacetylene; LIQUID-CRYSTALLINE COMPOUNDS; HIGH CARRIER MOBILITY; TRANSITION-TEMPERATURES; MESOMORPHIC PROPERTIES; REFRACTIVE-INDEX; TRANSPORT; BEHAVIOR; SEMICONDUCTORS; POLYTHIOPHENES; QUATERPHENYL;

D O I：

10.1080/02678292.2013.873492

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

New monocyclic and bicyclic thiophene-based diaryl-diacetylene liquid crystal (LC) materials were synthesised and demonstrated to exhibit wide enantiotropic nematic phases. One thiophenyl-benzene derivative, in particular, displayed a stable nematic phase across a temperature range of over 100 degrees C. The birefringence properties of the compounds were measured using a multiple-beam interference (MBI) method, with the highest value found to be for the same thiophenyl-benzene molecule (Delta n = 0.57, 550 nm) at 10 degrees C above the crystal-to-nematic transition temperature. Furthermore, the effects of the cyclic structure on the mesomorphic behaviours, transition temperatures, and birefringence properties were investigated in detail from both experimental and theoretical viewpoints.

引用

页码：642 / 651

页数：10

共 23 条

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