Anharmonic couplings underlying the ultrafast vibrational dynamics of hydrogen bonds in liquids

被引：74

作者：

Huse, N ^{[1
]}

Bruner, BD

Cowan, ML

Dreyer, J

Nibbering, ETJ

Miller, RJD

Elsaesser, T

机构：

[1] Max Born Inst Nichtlineare & Kurzzeitspektroskopi, D-12489 Berlin, Germany

[2] Univ Toronto, Dept Phys, Toronto, ON M5S 3H6, Canada

[3] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.95.147402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The multilevel structure and vibrational couplings of O - H stretching transitions in intermolecular hydrogen bonds of acetic acid dimers are determined by femtosecond two-dimensional photon-echo spectroscopy in the infrared. Combining experiment and theoretical calculations, we separate Fermi resonances with combination tones of fingerprint modes from anharmonic couplings to underdamped low-frequency modes of the dimer. A multilevel density matrix approach based on density functional theory calculations reproduces the experimental results and reveals coupling strengths of both mechanisms on the order of 40-150 cm(-1).

引用

页数：4

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