Journal
CHEMICAL PHYSICS LETTERS
Volume 329, Issue 5-6, Pages 386-392Publisher
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DOI: 10.1016/S0009-2614(00)01046-0
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Excitation of Fe(CN)(6)(4-) complex in D2O solution with a 267 nm ultrashort laser pulse results in rapid charge-transfer-to-solvent, and subsequent electron hydration, Mid-IR transient absorption spectroscopy is used to investigate the ejection and earliest steps in electron solvation. A broad, intense absorption signal is observed with instrument-response-limited rise and 170 +/- 20 fs single exponential decay at all probe wavelengths studied, stretching from similar to3 to 7 mum. No significant solvent isotope dependence in the time-evolution was seen. The spectral and temporal characteristics of the mid-IR signal provide strong evidence that it arises from a step in solvation immediately preceding formation of the presolvated electron. (C) 2000 Elsevier Science B.V. All rights reserved.
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