Photo-Orientation of Azobenzene-Containing Liquid-Crystalline Materials by Means of Domain Structure Rearrangement

被引：28

作者：

Bogdanov, Alexey V. ^{[1
]}

Vorobiev, Andrey Kh. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2013年 / 117卷 / 44期

关键词：

MOLECULAR INTERPRETATION; REORIENTATION; DYNAMICS; THERMODYNAMICS; ORIENTATION; IRRADIATION; RELAXATION; TRANSITION; MECHANISM; SOLVENTS;

D O I：

10.1021/jp4080509

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：

A novel mechanism of photo-orientation of azobenzene-containing liquid-crystalline materials is proposed. This mechanism is based on the notion of photochemically induced domain rearrangement driven by destabilization of liquid-crystalline phase in light absorbing domains due to photochemical formation of non-mesogenic cis-azobenzene moieties. The experimental evidence of photoinduced movement of a domain boundary is presented, and the velocity of this movement is measured. A mathematical model for photo-orientation of a polydomain azobenzene-containing material is formulated. The values of model parameters for a liquid-crystalline azopolymer have been measured in separate experiments. Theoretical predictions demonstrate quantitative agreement with the experimental observations.

引用

页码：13936 / 13945

页数：10

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