A TEST OF HYDRODYNAMICS IN BINARY SOLVENT SYSTEMS - ROTATIONAL DIFFUSION STUDIES OF OXAZINE-118

被引：56

作者：

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 / 12期

关键词：

D O I：

10.1021/j100165a047

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 of the dye molecule oxazine 118 has been studied in DMSO/water and 1-propanol/water solvent mixtures as a function of temperature. The rotational relaxation time does not scale linearly with viscosity when the solvent composition is changed at a fixed temperature, as observed previously with other probe molecules. In a given solvent mixture the rotational relaxation time follows hydrodynamic predictions when the temperature is varied. The change in relaxation time with composition does not indicate a breakdown of hydrodynamic predictions but can be interpreted as arising from a change in the hydrodynamic boundary condition. Models for the changing boundary condition are evaluated.

引用

页码：4848 / 4852

页数：5

共 65 条

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