LASER-INDUCED ORIENTATIONAL CHANGE OF NEMATIC LIQUID-CRYSTALLINE MOLECULES MEDIATED BY PHOTOCHROMIC REACTIONS OF SURFACE AZOBENZENES

被引：16

作者：

KAWANISHI, Y

SUZUKI, Y

SAKURAGI, M

KAMEZAKI, H

ICHIMURA, K

机构：

[1] HITACHI MAXELL LTD, ENGN RES LAB, TSUKUBA, IBARAKI 30024, JAPAN

[2] TOKYO INST TECHNOL, RESOURCES UTILIZAT RES LAB, YOKOHAMA, KANAGAWA 227, JAPAN

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1994年 / 80卷 / 1-3期

关键词：

D O I：

10.1016/1010-6030(94)01045-5

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：

The alignment of nematic liquid crystalline (LC) molecules with respect to the LC cell surface was regulated between the homeotropic (H) state and the parallel (P) state by the photochromic trans-cis isomerization of surface-attached azobenzene (Az) moieties. By bringing the angular-selective photoreaction into the system, the orientational order in the P state was significantly improved to attain a universal orientational axis over the entire irradiated area, which was rotatable and erasable photochemically. Laser pulse experiments revealed that the alignment relaxation time tau was reduced from 1000 to 30 ms by increasing the pulse intensity from 10 to 20 mJ cm-2. Strong coupling between the LC and Az molecules was indicated.

引用

页码：433 / 438

页数：6

共 15 条

[1] REVERSIBLE ALIGNMENT CHANGE OF LIQUID-CRYSTALS INDUCED BY PHOTOCHROMIC MOLECULAR FILMS .13. FACTORS AFFECTING PHOTOINDUCED ALIGNMENT REGULATION OF CYCLOHEXANECARBOXYLATE-TYPE NEMATIC LIQUID-CRYSTALS BY AZOBENZENE MOLECULAR FILMS [J].