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| Effect of CC Coherent Vibration on Relative Raman Scattering Cross Sections of All-trans β-Carotene | |
| 基金项目： | Supported by the National Natural Science Foundation of China(No.10774057), the Foundation of Jilin Provincial Science & Technology Department, China(No.20090534) and the Opened Fund of State Key Laboratory of Integrated Optoelectronics, China (No.IOSKL- KF200908). |
| 摘 要： | <正>We have determined the Raman scattering cross sections(RSCSs) ofβ-carotene for C=C and C—C stretching modes,with the 1444 cm~(-1) Raman band of cyclohexane as internal standard,in different solvents at low concentrations by measuring Raman intensity.The results show that RSCSs ofβ-carotene were 10~6—10~7 times larger than the general RSCSs,we analyzed that this enhancement was caused not only by the resonance Raman effect but also by nonlinear coherent CC vibration in aqueousβ-carotene.Moreover,overtone and combinations of it were also observed and their intensities were 10%—20%of those of their fundamentals whenβ-carotene was dissolved in non-polar solvents,respectively. |
| 关 键 词： | 共振拉曼效应 胡萝卜素 散射截面 振动 相干 全反式 非极性溶剂 板块 |
| 收稿时间： | 2010-01-22 |
Effect of CC Coherent Vibration on Relative Raman Scattering Cross Sections of All-trans β-Carotene |
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| LI Zhan-long LI Dong-fei SUN Cheng-lin LI Zuo-wei ZHOU Qiang CAO Jun-sheng GAO Feng-li. Effect of CC Coherent Vibration on Relative Raman Scattering Cross Sections of All-trans β-Carotene[J]. Chemical Research in Chinese University, 2010, 26(4): 608-611 | |
| Authors: | LI Zhan-long LI Dong-fei SUN Cheng-lin LI Zuo-wei ZHOU Qiang CAO Jun-sheng GAO Feng-li |
| Affiliation: | 1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P. R. China; 2. College of Physics, Jilin Universty, Changchun 130021, P. R. China; 3. Lab of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China; 4. State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012,?P. R. China |
| Abstract: | We have determined the Raman scattering cross sections(RSCSs) of β-carotene for C=C and C―C stretching modes, with the 1444 cm–1 Raman band of cyclohexane as internal standard, in different solvents at low concentrations by measuring Raman intensity. The results show that RSCSs of β-carotene were 106―107 times larger than the general RSCSs, we analyzed that this enhancement was caused not only by the resonance Raman effect but also by nonlinear coherent CC vibration in aqueous β-carotene. Moreover, overtone and combinations of it were also observed and their intensities were 10%―20% of those of their fundamentals when β-carotene was dissolved in non-polar solvents, respectively. |
| Keywords: | Raman scattering cross section Electron-phonon coupling Coherent vibration |
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