Subpicosecond solvation relaxation of DASPI in polar liquids

被引：31

作者：

Jonkman, AM

vanderMeulen, P

Zhang, H

Glasbeek, M

机构：

[1] Laboratory for Physical Chemistry, University of Amsterdam, 1018 WS Amsterdam

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 256卷 / 1-2期

关键词：

D O I：

10.1016/0009-2614(96)00431-9

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：

The solvation dynamics of 2-(p-dimethylaminostyryl)pyridylmethyl iodide (DASPI) dissolved in the solvents methanol, ethylene glycol, ethanol and acetonitrile, has been studied using the fluorescent up-conversion technique with a time resolution of about 100 fs. A bimodal solvent response function is obtained for DASPI dissolved in the polar solvents. In the bimodal response function the ultrafast initial decay component, a Gaussian term with a characteristic frequency of omega(G) congruent to 10 ps(-1), is attributed to inertial free streaming motions of the solvent molecules. In addition, for all solutions slower decay components with time constants of several picoseconds typical of rotational and translational diffusional motions of the solvent molecules have been found.

引用

页码：21 / 26

页数：6

共 28 条

[1] DIELECTRIC-RELAXATION DYNAMICS OF WATER AND METHANOL SOLUTIONS ASSOCIATED WITH THE IONIZATION OF N,N-DIMETHYLANILINE - THEORETICAL ANALYSES [J].