Time-resolved fluorescence of a hemicyanine dye: Dynamics of rotamerism and resolvation

被引：44

作者：

Röcker, C

Heilemann, A

Fromherz, P

机构：

[1] UNIV ULM, DEPT BIOPHYS, D-89069 ULM, GERMANY

[2] MAX PLANCK INST BIOCHEM, DEPT MEMBRANE & NEUROPHYS, D-82152 MARTINSRIED MUNCH, GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 30期

关键词：

D O I：

10.1021/jp960095k

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：

We observed the time-resolved fluorescence spectra of a hemicyanine dye with no CC double bond and one CC single bond and of a homologous dye with blocked rotamerism of the CC single bond. Using the more rigid dye, we determined the dynamics of resolvation. Taking that reference, we analyzed the dynamics of rotamerism around the CC single bond. We found that the Franck-Condon geometry equilibrates with a polar-twisted rotamer which is deactivated by fast nonradiative decay. The rotamerism occurs during the relaxation of the solvation shell.

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页码：12172 / 12177

页数：6

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