Influence of pressure effect on Fermi resonance in binary solution |
| |
| Authors: | Jiang Xiu-Lan Yang Guang Li Dong-Fei Zhou Mi Sun Cheng-Lin Gao Shu-Qin Li Zuo-Wei |
| |
| Affiliation: | State Laboratory of Superhard Materials, Jilin University, Changchun 130021, China; School of Science, Qingdao Technological University, Qingdao 266033, China; College of Physics, Jilin University, Changchun 130021, China |
| |
| Abstract: | The Fermi resonance behaviours of the two groups of binary solutions --- pyridine and methanol, benzene and carbon tetrachloride, under different pressures are investigated according to their Raman spectra. The effect of pressure on Fermi resonance in binary solution differs significantly from that in pure liquid. In a binary solution, with the intermolecular distance shortening, the intermolecular interaction potential increases, the shift rates of the Raman spectral lines increase, the spectral line splitting occurs ahead of that in pure liquid, and the wavenumber separation Δ0 between the unperturbed harmonic levels shifts more quickly, too. The Fermi resonance parameters, the coupling coefficient W and the intensity ratio R of the two Raman bands, decrease rapidly with pressure increasing, and the pressure at which Fermi resonance phenomenon disappears is much lower than that in pure liquid, especially in the solution whose molecules are of the same polarity. This article is valuable in the identification and the assignment of spectral lines under high pressure, as well as the study of high pressure effect, intermolecular interaction, and solvent effects in different cases, etc. |
| |
| Keywords: | Fermi resonance binary solution Raman spectra |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
