Chain relaxation kinetics in the intramolecular charge transfer reaction of 1-(9-anthryl)-3-(4-dimethylaniline)propane in supercritical CO2:: bulk solvent properties characterize reactivity

被引：16

作者：

Khajehpour, M ^{[1
]}

Kauffman, JF ^{[1
]}

机构：

[1] Univ Missouri, Dept Chem, Columbia, MO 65211 USA

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 297卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(98)01117-8

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：

Intramolecular charge transfer rate constants of ADMA (l-(9anthryl)3-(4-N, N-dimethylaniline)propane) have been determined vs, density in supercritical fluid CO, from fluorescence lifetimes of ADMA and APP (l-(9-anthryl)-3-phenylpropane). Comparison with results in mixed liquids indicates that viscosity plays a dominant role in determining the kinetics in supercritical CO,. The chain relaxation times observed in supercritical CO, follow the behavior predicted from the bulk fluid viscosity, demonstrating that local density enhancement has no effect on this diffusion-controlled reaction rate. The results serve to characterize the length scale over which solvent density augmentation in supercritical CO, may influence diffusion-controlled reactions. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：141 / 146

页数：6

共 21 条

[1] ROTATIONAL RELAXATION IN THE COMPRESSIBLE REGION OF CO2 - EVIDENCE FOR SOLUTE-INDUCED CLUSTERING IN SUPERCRITICAL-FLUID SOLUTIONS [J].