Solvation dynamics of DCM in micelles

被引：68

作者：

Pal, SK ^{[1
]}

Sukul, D ^{[1
]}

Mandal, D ^{[1
]}

Sen, S ^{[1
]}

Bhattacharyya, K ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Phys Chem, Calcutta 700032, W Bengal, India

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 327卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(00)00847-2

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 4-(dicyanomethylene)-2-methyl-6(p-dimethylaminostyryl) 4H-pyran (DCM) have been studied in neutral (Triton X-100, TX), cationic (cetyl trimethyl ammonium bromide, CTAB) and anionic (sodium dodecyl sulfate, SDS) micelles using picosecond time-resolved Stokes shift. Above the critical micellar concentration for all three micelles, DCM exhibits wavelength-dependent fluorescence decays. At short wavelengths, a fast decay is observed while, at long wavelengths, a distinct growth precedes the decay. The time-dependent Stokes shift indicates that the water molecules in the Stern layer of the micelles relax on a timescale which is markedly slower than the sub-picosecond relaxation dynamics in pure water. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：91 / 96

页数：6

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