Transient x-ray absorption spectroscopy of hydrated halogen atom

Details Transient x-ray absorption spectroscopy of hydrated halogen atom Transient x-ray absorption spectroscopy of hydrated halogen atom

2007-08-29

arxiv.org/abs/0708.3985v1

Physics

Chemical Physics

6 pages, 4 figures + supplement, will be submitted to PRL

Scientific paper

10.1063/1.2827456

Time-resolved x-ray absorption spectroscopy monitors the transient species generated by one-photon detachment of an electron from aqueous bromide. Hydrated bromine atoms with a lifetime of ca. 17 ns were observed, nearly half of which react with excess Br- to form Br2-. The K-edge spectra of the Br atom and Br2- anion exhibit distinctive resonant transitions that are absent for the Br- precursor. The absorption spectra indicate that the solvent shell around a Br0 atom is defined primarily by hydrophobic interactions, in agreement with a Monte Carlo simulation of the solvent structure.

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