AN EXPERIMENTAL TEST OF DIELECTRIC FRICTION MODELS USING THE ROTATIONAL DIFFUSION OF AMINOANTHRAQUINONES

被引：88

作者：

HARTMAN, RS ^{[1
]}

ALAVI, DS ^{[1
]}

WALDECK, DH ^{[1
]}

机构：

[1] UNIV PITTSBURGH,DEPT CHEM,PITTSBURGH,PA 15260

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 20期

关键词：

D O I：

10.1021/j100173a059

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：

Rotational diffusion studies on a pair of mechanically similar aminoanthraquinones with different electronic properties are used to explore solute/solvent interactions, specifically dielectric friction. In benzonitrile, the nonpolar solute (tetraaminoanthraquinone) exhibited a significantly longer rotation time than the polar analogue (diaminoanthraquinone), whereas in toluene the solutes had similar relaxation times. The experimental relaxation rates are compared with those predicted by both hydrodynamic and dielectric friction theories. A model recently developed model by Alavi and Waldeck (J. Chem. Phys. 1991, 94, 6196) for calculating the dielectric friction shows a marked improvement over earlier approaches.

引用

页码：7872 / 7880

页数：9

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