Ultrafast mid-IR detection of the direct precursor to the presolvated electron following electron ejection from ferrocyanide

被引：22

作者：

Anderson, NA ^{[1
]}

Hang, K ^{[1
]}

Asbury, JB ^{[1
]}

Lian, TQ ^{[1
]}

机构：

[1] Emory Univ, Dept Chem, Atlanta, GA 30322 USA

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 329卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(00)01046-0

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：

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.

引用

收藏

页码：386 / 392

页数：7

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