二元溶液中基频拉曼散射系数随浓度变化对费米共振的影响  

Effect of the Change in Fundamental Raman Scattering Coefficient with the Concentration on Fermi Resonance in Binary Solution

作　　者：李东飞[1,2] 蒋秀兰[2] 孙成林[2] 姜永恒[2] 周密[2] 里佐威[1,2] 高淑琴[2] 陆国会[2] 杨健戈[3] 

机构地区：[1]吉林大学超硬材料国家重点实验室,吉林长春130021 [2]吉林大学物理学院,吉林长春130021 [3]空军航空大学航空军械系,吉林长春130022

出　　处：《光谱学与光谱分析》2010年第3期688-691,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10774057);吉林省科技厅发展计划项目(20090534)资助

摘　　要：在二硫化碳（CS2）和苯（C6H6）的二元溶液中,随着相对体积浓度而变化,C6H6的基频1ν（992cm-1）的拉曼散射系数随浓度减小而增加,而CS2的基频1ν（656 cm-1）的拉曼散射系数则随浓度增加而增加。文章测量了这二元溶液相对不同体积浓度的拉曼光谱。结果表明,尽管CS2和C6H6的基频1ν的强度都随着浓度变化而发生较大变化,但C6H6的基频1ν对其参与的1ν＋6ν~8ν费米共振几乎没有影响,而CS2的基频1ν强度的变化不仅对1ν~22ν费米共振产生较大影响,还使基频2ν发生变化。文章给出了实验结果,并用Bertran费米共振理论和群论给予了解释。The Raman scattering coefficients of the fundamental ν1（992 cm^-1 ） of C6H6 and the fundamental ν1 （656 cm^-1） of CS2 changed dramatically with relative concentration of the binary solution of CS2 and C6H6. The Raman spectra of the binary solution with different relative concentrations were measured. The results show that both the ν1 fundamentals intensities changed dramatically with the relative concentration of the solution and the fundamental Vl of C6H6 has little effect on the Fermi resonance ν1 ＋ν6 -ν8. On the contrary, the change in the v, fundamental intensity of the CS2 changed which has more effect not only on the Fermi resonance ν1-2ν2 but also on the ν2 fundamental. In this report, the experimental results were analyzed based on the J. F. Bertran theory and group theory.

关 键 词：费米共振 散射系数 拉曼光谱 

分 类 号：O657.3[理学—分析化学]