Ultrashort orientational dynamics of liquid crystals in the smectic-A phase

被引：13

作者：

LeCalvez, A

Montant, S

Freysz, E

Ducasse, A

Zhuang, XW

Shen, YR

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 258卷 / 5-6期

关键词：

D O I：

10.1016/0009-2614(96)00702-6

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 femtosecond time-resolved optical Kerr effect experiment was carried out to study the reorientational motion of a series of cyanobiphenyl molecules around their long axis in the smectic-A phase, The Kerr effect was found to mainly result from the reorientation of the cyanobiphenyl core of the liquid crystal molecule. Three relaxation times were observed in the subpicosecond and picosecond range. They appear to be associated with libration and diffusive reorientations of chromophores of individual and paired molecules. The analysis on several temporal scales reveals the existence of strong molecular interactions within the smectic-A layers.

引用

页码：620 / 625

页数：6

共 15 条

[1]

[Anonymous], 1984, DYNAMICS MOL LIQUIDS

[2]

[Anonymous], MOL LIQUIDS DYNAMICS

[3]

Berne BJ, 1976, Dynamic Light Scattering

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