title: Mode-specific intermolecular vibrational energy transfer. II. Deuterated water and potassium selenocyanate mixture.
abstract: Vibrational energy transfer from the first excited state (2635 cm(-1)) of the O-D stretch of deuterated water (D(2)O) to the 0-1 transition (2075 cm(-1)) of the CN stretch of potassium selenocyanate (KSeCN) in their 2.5:1 liquid mixture was observed with a multiple-mode two dimensional infrared spectroscopic technique. Despite the big energy mismatch (560 cm(-1)) between the two modes, the transfer is still very efficient with a time constant of 20 ps. The efficient energy transfer is probably because of the large excitation coupling between the two modes. The coupling is experimentally determined to be 176 cm(-1). An approximate analytical equation derived from the Landau-Teller formula is applied to calculate the energy transfer rate with all parameters experimentally determined. The calculation results are qualitatively consistent with the experimental data.
authors.affiliation: Department of Chemistry, Rice University, Houston, Texas 77005, USA.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Bian
authors.forename: Xiewen
authors.initials: X
authors.lastname: Wen
authors.forename: Jiebo
authors.initials: J
authors.lastname: Li
authors.forename: Junrong
authors.initials: J
authors.lastname: Zheng