Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 126, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2428299
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Experimental observation and time relaxation measurement of the hydrated proton Eigen form [H3O+(H2O)(3)] are presented here. Vibrational time-resolved spectroscopy is used with an original method of investigating the proton excess in water. The anharmonicity of the time-resolved spectra is characteristic of the Eigen-type proton geometry. Proton relaxation occurs in less than 200 fs. A calculation of the potential energy confirms the experimental result and the Eigen cation lifetime is in good agreement with previous molecular dynamics simulations. (c) 2007 American Institute of Physics.
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