MODELING OF CORRELATED INTERNAL MOTIONS AND DEUTERON SPIN RELAXATION IN LIQUID-CRYSTALS

被引：32

作者：

DONG, RY

RICHARDS, GM

机构：

[1] Department of Physics and Astronomy, Brandon University, Brandon

来源：

CHEMICAL PHYSICS LETTERS | 1990年 / 171卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0009-2614(90)85384-O

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：

Using the master-equation method, we examine the effects of correlated internal rotations in an alkyl chain on the spectral densities of motion. It is assumed that the overall reorientation of molecules is decoupled from the internal motions in their alkyl end chains. The pentyl chain that is attached to a cylindrical biphenyl core in 4-n-pentyl-4′ -cyanobiphenyl is studied. The reorientation of a symmetric top in an anisotropic potential is accounted for, using the small-step rotational diffusion model. The effects of a nematic mean field on the chain dynamics are discussed. Both J1 (ω) and J2 (2ω) are found to be frequency dependent, with J2 (2ω) being weaker. © 1990.

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页码：389 / 393

页数：5

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