Photoinduced circular anisotropy in a photochromic W-shaped-molecule-doped polymeric liquid crystal film

被引：34

作者：

Choi, SW ^{[1
]}

Ha, NY

Shiromo, K

Rao, NVS

Paul, MK

Toyooka, T

Nishimura, S

Wu, JW

Park, B

Takanishi, Y

Ishikawa, K

Takezoe, H

机构：

[1] Tokyo Inst Technol, Dept Organ & Polymer Mat, Meguro Ku, Tokyo 1528552, Japan

[2] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea

[3] Assam Univ, Dept Chem, Silchar 788011, India

[4] Nippon Oil Corp, Cent Tech Res Lab, Naka Ku, Yokohama, Kanagawa 2310815, Japan

[5] Kwangwoon Univ, Dept Electrophys, Seoul 139701, South Korea

来源：

PHYSICAL REVIEW E | 2006年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.73.021702

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Photoinduced circular anisotropy has been demonstrated in thin films of a main-chain polymeric liquid crystal (PLC) system doped with photochromic W-shaped molecules containing two azobenzene groups by irradiating with circularly polarized light (CPL). Reversible photoinduced circular dichroism (CD) was observed with sign relevant to the handedness of the CPL. The experimentally observed CD spectra were analyzed using the DeVoe polarizability model associated with the coupled oscillator method. We also propose a mechanism for the photoinduced circular anisotropy in our system; nucleating the W-shaped molecules with preferential twisted conformation by CPL irradiation, and triggering the local formation of a chiral structure in the W-shaped-molecule-doped main-chain PLC medium.

引用

页数：6

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