Campus Units

Chemistry

Document Type

Article

Publication Version

Published Version

Publication Date

10-1992

Journal or Book Title

Journal of the American Chemical Society

Volume

114

Issue

22

First Page

8343

Last Page

8345

DOI

10.1021/ja00048a001

Abstract

The 7-azaindole chromophore in water is studied by means of picosecond absorption and fluorescence spectroscopy in order to determine its nonradiative decay pathways. It is concluded that a small population of 7-azaindole molecules (-20%) undergo excited-state tautomerization in about 70 ps. Intersystem crossing and photoionization are also identified as nonradiative decay channels. Photoionization occurs largely from an electronic state lying slightly in energy above the fluorescent state. This new understanding of the photophysics of the 7-azaindole chromophore in water will be essential in interpreting its behavior when it is used as an optical probe of protein structure and dynamics.

Comments

Reprinted (adapted) with permission from Journal of the American Chemical Society 114, (1992): 8343, doi: 10.1021/ja00048a001, Copyright 1992 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

Included in

Chemistry Commons

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