Electric field fluctuations drive vibrational dephasing in water. Journal Article uri icon

Overview

abstract

  • We present a microscopic description of the vibrational spectroscopy of the OH stretch of HOD in liquid D(2)O. Our model predicts that OH frequency correlations decay with a sharp and rapid ( approximately 35 fs) decrease, followed by a beat at approximately 125 fs from intermolecular oxygen vibrations. On a short time scale ( approximately 200 fs), ultrafast infrared spectroscopy of the OH stretch is sensitive to localized intermolecular motions. For times longer than approximately 200 fs, cooperative molecular rearrangements drive dephasing. The interplay of electric field fluctuations, both local and cooperative, dictate vibrational frequency shifts and destroy vibrational coherence in water.

publication date

  • October 1, 2005

Full Author List

  • Eaves JD; Tokmakoff A; Geissler PL

Other Profiles

Additional Document Info

start page

  • 9424

end page

  • 9436

volume

  • 109

issue

  • 42