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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2013,Vol.29>> Issue(04)>> 695-700     doi: 10.3866/PKU.WHXB201302213         中文摘要
THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY
Femtosecond Two-Dimensional Infrared Spectroscopy of N-Ethypropionamide
SHI Ji-Pei, ZHAO Juan, YANG Fan, WANG Jian-Ping
Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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Femtosecond two-dimensional infrared (2D IR) spectroscopy, steady-state infrared spectroscopy, and computational methods are used to examine the ultrafast structural dynamics of a β-peptide model compound, N-ethylpropionamide (NEPA). NEPA has amide-I vibrational characteristics similar to that in an α-peptide, which shows sensitivity to molecular structure and chemical environment. The 2D IR spectral dynamics reveal a spectral diffusion time of ~1 ps, which is believed to be consistent with the time scale of the structural dynamics of the amide-water hydrogen bond.



Keywords: N-ethypropionamide   Femtosecond two-dimensional infrared spectroscopy   Anharmonic vibration   Molecular dynamics simulation  
Received: 2012-12-21 Accepted: 2013-02-06 Publication Date (Web): 2013-02-21
Corresponding Authors: Email: jwang@iccas.ac.cn; yangfan@iccas.ac.cn

Fund: The project was supported by the National Natural Science Foundation of China (21173231, 91121020, 20727001) and Hundred Talent Project of the Chinese Academy of Sciences.

Cite this article: SHI Ji-Pei, ZHAO Juan, YANG Fan, WANG Jian-Ping. Femtosecond Two-Dimensional Infrared Spectroscopy of N-Ethypropionamide[J]. Acta Phys. -Chim. Sin., 2013,29 (04): 695-700.    doi: 10.3866/PKU.WHXB201302213

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