High pressure investigations of the photo-stimulated orientational ordering transition in a liquid crystal with photoactive dimeric molecules

被引：4

作者：

Gupta, VK ^{[1
]}

Rao, DSS ^{[1
]}

Lobo, CV ^{[1
]}

Prasad, SK ^{[1
]}

Hiremath, US ^{[1
]}

Yelamaggad, CV ^{[1
]}

机构：

[1] Ctr Liquid Crystal Res, Bangalore 560013, Karnataka, India

来源：

THERMOCHIMICA ACTA | 2006年 / 440卷 / 02期

关键词：

photo-isomerization; photoinduced transition; high pressure studies;

D O I：

10.1016/j.tca.2005.11.012

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

High pressure investigations have been carried out on the photo-stimulated phase transition exhibited by a guest-host system, where the host is a non-photoactive liquid crystal. As guest molecules we chose successive homologues of a dimeric photoactive azobenzene liquid crystalline molecule to understand the influence of the length and parity of the alkylene spacer on such a transition. Our studies show that application of pressure as well as the parity of the spacer has a drastic influence both on the static and dynamic characters of the photo-stimulated phase transition. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：205 / 211

页数：7

共 30 条

[1]

The liquid crystal properties of symmetric and non-symmetric dimers based on the azobenzene mesogenic group [J].

Blatch, AE ;

Luckhurst, GR .

LIQUID CRYSTALS, 2000, 27 (06) :775-787

[2]

Photoinduced dichroism and optical anisotropy in a liquid-crystalline azobenzene side chain polymer caused by anisotropic angular distribution of trans and cis isomers [J].

Blinov, LM ;

Kozlovsky, MV ;

Ozaki, M ;

Skarp, K ;

Yoshino, K .

JOURNAL OF APPLIED PHYSICS, 1998, 84 (07) :3860-3866

[3]

Bobrovsky AY, 2000, ADV MATER, V12, P1180, DOI 10.1002/1521-4095(200008)12:16<1180::AID-ADMA1180>3.0.CO

[4]

2-E

[5]

Fast liquid-crystal elastomer swims into the dark [J].

Camacho-Lopez, M ;

Finkelmann, H ;

Palffy-Muhoray, P ;

Shelley, M .

NATURE MATERIALS, 2004, 3 (05) :307-310

[6]

PHOTOMECHANICALLY INDUCED PHASE-TRANSITIONS IN FERROELECTRIC LIQUID-CRYSTALS [J].

COLES, HJ ;

WALTON, HG ;

GUILLON, D ;

POETTI, G .

LIQUID CRYSTALS, 1993, 15 (04) :551-558

[7]

EFFECTS OF UV IRRADIATION ON NEMATIC CHLOROSTILBENES [J].

HAAS, WE ;

NELSON, KF ;

ADAMS, JE ;

DIR, GA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1974, 121 (12) :1667-1669

[8]

Photomodulation of liquid crystal orientations for photonic applications [J].

Ikeda, T .

JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (09) :2037-2057

[9]

OPTICAL SWITCHING AND IMAGE STORAGE BY MEANS OF AZOBENZENE LIQUID-CRYSTAL FILMS [J].

IKEDA, T ;

TSUTSUMI, O .

SCIENCE, 1995, 268 (5219) :1873-1875

[10]

THERMODYNAMICALLY BASED MELTING-CURVE EQUATION [J].

KECHIN, VV .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1995, 7 (03) :531-535

← 1 2 3 →