| 光谱学与光谱分析 |
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| The Effects of Complex of Benzoquinone on Fermi Resonance |
| LI Shuai-peng1, 2, ZHANG Feng-qin2, JIANG Li-tong3, LIN Xiao-long2, JIANG Yong-heng1, 2*, ZHANG Liu-yang4, LIN Bo5, GU Hao5 |
1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
2. College of Physics, Jilin University, Changchun 130023, China
3. College of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
4. School of Applied Science, Harbin University of Science and Technology, Harbin 150080, China
5. College of Materials Science and Engineering, Jilin University, Changchun 130022, China |
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Abstract Fermi resonance phenomenon exists in simple compounds and it also widely exists in vibration spectra of complex. The complex can be formed by adding up simple compounds. As a result, the characteristic parameters of some parts of molecule will make changes, and the molecular spectra have a significant change along with it. Benzoquinone and proline in the solution form charge-transfer complex under certain conditions, but the spectra intensity is weak, our research uses Teflon liquid-core optical fiber technology to gain high quality resonance Raman spectra. We acquire Raman spectra of Benzoquinone and its complex in experiments, and analyze the characteristic parameters of Fermi resonance according to J. F. Bertran quantum theory. The results shows that, because of the formation of complex, Fermi resonance peak of CO bond shifts to high wavelength, the spectra intensity decreases, the frequency space increases, the coupling coefficient increases. The explanation is that, in the solution of complex, proline is donor, while benzoquinone is acceptor, the non-bonding electron of N atom which is belong to proline transfers to the π anti-bonding orbital of benzoquinone, then n—π* charge transfer complex is produced. That causes the change of molecular energy level, changes the Raman spectra. All these researches provide new idea and clue for spectral line certification and attribution of complex molecules, complexes and polymer.
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Received: 2014-06-08
Accepted: 2014-10-12
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Corresponding Authors:
JIANG Yong-heng
E-mail: yonghengj@126.com
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