Vibrational dynamics of N-H, C-D, and C=O modes in formamide.
作者： Jeong-Hyon Ha , Yung Sam Kim , Robin M. Hochstrasser
DOI: 10.1063/1.2162165
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摘要: By means of heterodyned two-dimensional IR photon echo experiments on liquid formamide and isotopomers the vibrational frequency dynamics N–H stretch mode, C–D CO mode were obtained. In each case correlation function is fitted to three exponentials representing ultrafast (few femtoseconds), intermediate (hundreds slow (many picoseconds) times. there a significant underdamped contribution decay that was not seen in previous attributed hydrogen-bond librational modes. This motion or functions. The motions probed by bond are generally faster than those CO, indicating environment interchanges more rapidly, consistent with weaker C–D⋯OC bond. decays similar, both being involved strong H bonding.
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