Observation of the Solvent Shell Reorganization around Photoexcited Atomic Solutes by Picosecond X-ray Absorption Spectroscopy

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• 作者：Van-Thai Pham ; Wojciech Gawelda ; Yuri Zaushitsyn ; Maik Kaiser ; Daniel Grolimund ; Steven L. Johnson ; Rafael Abela ; Christian Bressler ; Majed Chergui
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：February 14, 2007
• 年：2007
• 卷：129
• 期：6
• 页码：1530 - 1531
• 全文大小：79K
• 年卷期：v.129,no.6(February 14, 2007)
• ISSN：1520-5126

文摘

We report on the observation of the solvation shell rearrangement after abstraction of the electron from aqueous I^- in a laser pump/X-ray probe experiment by recording the X-ray absorption L₁- and L₃-edge spectra, 50 ps after laser excitation. The L₁-edge spectra clearly identify the I⁰ neutral species after excitation and suggest a substantial amount of back-transfer of charge from the solvent species. Both edge spectra point to a significant rearrangement of the solvation shell around I⁰.