Mesogenic behaviour of isomeric bent-core 6-oxoverdazyls: 1,3-vrs 1,5-substitution pattern

被引：6

作者：

Ciastek-Iskrzycka, Sylwia ^{[1
]}

Gerding, Jason ^{[2
]}

Kaszynski, Piotr ^{[1
,2
,3
,4
]}

Pociecha, Damian ^{[5
]}

机构：

[1] Univ Lodz, Dept Chem, Lodz, Poland

[2] Vanderbilt Univ, Dept Chem, Box 1583, Nashville, TN 37235 USA

[3] Polish Acad Sci, Organ Mat Res Grp, Ctr Mol & Macromol Studies, Lodz, Poland

[4] Middle Tennessee State Univ, Dept Chem, Murfreesboro, TN 37130 USA

[5] Univ Warsaw, Dept Chem, Warsaw, Poland

来源：

LIQUID CRYSTALS | 2018年 / 45卷 / 09期

关键词：

Synthesis; bent-core; isomers; stable radicals; fluoroalkane; EPR; LIQUID-CRYSTALLINE DERIVATIVES; DISCOTIC BEHAVIOR; RADICALS; DESIGN;

D O I：

10.1080/02678292.2018.1441454

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two series of isomeric bent-core derivatives of 6-oxoverdazyl, with alkyl and partially fluorinated alkyl chains, were investigated by thermo-optical, powder X-ray diffraction and electron paramagnetic resonance methods in the pure state and binary mixtures. The results revealed that the substitution position of the arms at the verdazyl ring (1,5 vs. 1,3) strongly affects mesogenic behaviour. Steric (torsion and bending angles) and dipolar factors in both isomers are considered. [GRAPHICS] .

引用

页码：1366 / 1376

页数：11