Abstract

We have used femtosecond mid-infrared pump-probe spectroscopy on the OH-stretching mode of HDO dissolved in D2O to investigate both the orientational and vibrational dynamics of water and ice. The orientational data provide evidence for a two-component structure of liquid water. The vibrational lifetime of the OH-stretch mode shows a remarkable temperature dependence: in water it is twice as long as in ice, and is found to increase with temperature.KeywordsLiquid WaterPump PulseVibrational RelaxationVibrational DynamicAnomalous Temperature DependenceThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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