Campus Units

Chemistry

Document Type

Article

Publication Version

Published Version

Publication Date

5-1993

Journal or Book Title

Journal of Physical Chemistry

Volume

97

Issue

19

First Page

5046

Last Page

5049

DOI

10.1021/j100121a032

Abstract

The excited-state photophysics of the biological probe, 7-azaindole, are examined in water and methanol. Electrons in a presolvated state absorbing in the infrared appear within the excitation pulse width of 130 fs. 330 i 100 fs is required for the presolvated electron to achieve the spectrum characteristic of the completely solvated electron. An excited-state transient absorbance decays in -350 fs for 7-azaindole and its methylated analog, N1-methyl-7-azaindole (1M7AI), in the region 400-450 nm in water and methanol. The instantaneous appearance of the electron in the infrared is attributed to the decay of the lLb excited-state that overlaps the 'La excited state of 7-azaindole. The rapid decay of the excited-state transient absorbance is attributed to preferential, dynamic solvation of the 'La state. 7-Azaindole thus provides an interesting example of a molecule whose excited state is continuously and dynamically solvated but which also produces a species, e,,-, whose solvation appears to occur in a stepwise process.

Comments

Reprinted (adapted) with permission from Journal of Physical Chemistry 97 (1993): 5046, doi: 10.1021/j100121a032. Copyright 1993 American Chemical Society.

Copyright Owner

American Chemical Society

Language

en

File Format

application/pdf

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