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Low-frequency vibrational modes of glutamine |
| Wang Wei-Ning(王卫宁)a)†, Wang Guo(王果) b)‡, and Zhang Yan(张岩)a) |
| a Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Department of Physics, Capital Normal University, Beijing 100048, China; b Department of Chemistry, Capital Normal University, Beijing 100048, China |
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Abstract High-resolution terahertz absorption and Raman spectra of glutamine in the frequency region 0.2 THz-2.8 THz are obtained by using THz time domain spectroscopy and low-frequency Raman spectroscopy. Based on the experimental and the computational results, the vibration modes corresponding to the terahertz absorption and Raman scatting peaks are assigned and further verified by the theoretical calculations. Spectral investigation of the periodic structure of glutamine based on the sophisticated hybrid density functional B3LYP indicates that the vibrational modes come mainly from the inter-molecular hydrogen bond in this frequency region.
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Received: 09 May 2011
Revised: 21 June 2011
Accepted manuscript online:
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PACS:
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33.20.-t
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(Molecular spectra)
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33.20.Vq
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(Vibration-rotation analysis)
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78.30.-j
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(Infrared and Raman spectra)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2007CB310408) and the Beijing Natural Science Foundation of China (Grant No. KZ201110028035). |
Cite this article:
Wang Wei-Ning(王卫宁), Wang Guo(王果), and Zhang Yan(张岩) Low-frequency vibrational modes of glutamine 2011 Chin. Phys. B 20 123301
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