Ultrafast transient-absorption spectroscopy of the aqueous solvated electron

We have performed the first direct pump-probe transient-absorption measurements on the near-infrared (IR) band of the equilibrated aqueous solvated electron. The pump pulse was centered at 780 nm. The absorption spectrum of the excited state is observed to be red-shifted relative to the ground-state...

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Bibliographic Details
Published in:The Journal of chemical physics 1993-04, Vol.98 (7), p.5996-5998
Main Authors: ALFANO, J. C, WALHOUT, P. K, KIMURA, Y, BARBARA, P. F
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Q1
Solvated and trapped electrons
Water
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Summary:We have performed the first direct pump-probe transient-absorption measurements on the near-infrared (IR) band of the equilibrated aqueous solvated electron. The pump pulse was centered at 780 nm. The absorption spectrum of the excited state is observed to be red-shifted relative to the ground-state absorption. The radiationless transition from the excited state to the ground state occurs with an average time constant of 550±170 fs. In observing a subpicosecond lifetime and red-shifted absorption for the excited p-states, these experiments are in accord with a growing body of experimental and theoretical work, serving to provide a consistent picture of the photophysics of the solvated electron.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.464839