Accession Number:

ADA235968

Title:

Nonexponential Solvation Dynamics of Simple Liquids and Mixtures

Descriptive Note:

Technical rept.

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMISTRY

Report Date:

1991-05-06

Pagination or Media Count:

16.0

Abstract:

Novel measurements on the microscopic solvation dynamics of coumarin probes in several simple polar solvents and mixtures have been made using the time dependent fluorescence Stokes shift technique. The microscopic solvent relaxation function, Ct, is observed to be poorly modeled by a single exponential decay in many cases. The average experimental solvation times, for pure solvents and binary solvent mixtures are close to values predicted by dielectric continuum theory. The results suggest that molecular motion of solvent molecules near the solute can be responsible for microscopic solvation components of Ct that are not predicted using bulk dielectric data of the neat solvent and the dielectric continuum theory.

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE