Solvation in highly nonideal solutions: A study of aqueous 1-propanol using the coumarin 153 probe

被引：77

作者：

Shirota, H ^{[1
]}

Castner, EW ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Chem, Piscataway, NJ 08854 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 05期

关键词：

D O I：

10.1063/1.480803

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：

We have investigated the anomalous behavior of aqueous 1-propanol binary solutions using a typical fluorescence probe molecule, coumarin 153. We present data on the fluorescence lifetimes, fluorescence anisotropies, and solvent reorganization dynamics, as well as the steady-state absorption and emission spectra of coumarin 153 in the binary solutions. The rotational diffusion and solvation time constants depend strongly on the content of 1-propanol, especially at low 1-propanol mole fractions. Spectroscopic results presented here are consistent with prior light scattering [G. H. Grossmann and K. H. Ebert, Ber. Bunsenges. Phys. Chem. 85, 1026 (1981)], small angle x-ray scattering [H. Hayashi, K. Nishikawa, and T. Iijima, J. Phys. Chem. 94, 8334 (1990)], and dielectric relaxation [S. Mashimo, T. Umehara, and H. Redlin, J. Chem. Phys. 95, 6257 (1991)] data. The anomalous dynamics features likely arise from the effect of the preferential solvation due to the 1-propanol clustering. (C) 2000 American Institute of Physics. [S0021-9606(00)50605-9].

引用

页码：2367 / 2376

页数：10

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