DIFFUSION-LIMITED PHOSPHORESCENCE QUENCHING INTERACTIONS IN POLYMER-SOLUTIONS - SMALL MOLECULE SMALL MOLECULE INTERACTIONS INTERPRETED BY FREE-VOLUME THEORY

被引：15

作者：

YU, DHS

TORKELSON, JM

机构：

[1] NORTHWESTERN UNIV,DEPT CHEM ENGN,EVANSTON,IL 60201

[2] NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60201

来源：

MACROMOLECULES | 1988年 / 21卷 / 04期

关键词：

PHOSPHORESCENCE; -; POLYSTYRENES; Solutions; TOLUENE;

D O I：

10.1021/ma00182a032

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Diffusion-limited interactions between benzil and anthracene were studied by phosphorescence quenching in polystyrene-cyclohexane, polystyrene-toluene, poly(methyl methacrylate)-toluene, and poly-butadiene-cyclohexane solutions. Values of the bimolecular diffusion-limited quenching rate constant, k//q, were obtained by measuring benzil phosphorescence lifetime as a function of anthracene concentration and applying a Stern-Volmer analysis. Besides polymer species and solvent, k//q was measured as a function of polymer molecular weight and concentration, up to 560 g/L. k//q was found to be independent of polymer molecular weight in polystyrene-cyclohexane solutions and exhibited a slight molecular weight dependence in polystyrene-toluene solutions.

引用

页码：1033 / 1041

页数：9

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