| 分子极性对类胡萝卜素共振拉曼光谱的影响 |
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| 引用本文： | 吴咏玲,刘天元,孙成林,曲冠男,里佐威.分子极性对类胡萝卜素共振拉曼光谱的影响[J].物理学报,2013,62(3):37801-037801. |
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| 作者姓名： | 吴咏玲 刘天元 孙成林 曲冠男 里佐威 |
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| 作者单位： | 1. 吉林大学超硬材料国家重点实验室, 长春 130012;
2. 吉林大学物理学院, 长春 130012 |
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| 基金项目： | 国家自然科学基金 (批准号: 10974067);新世纪优秀人才支持计划 (批准号: NCET-11-0201)和吉林省创新团队 (批准号: 20121806)资助的课题. |
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| 摘 要： | 测量了非极性分子β胡萝卜素和极性分子角黄素, 在非极性溶剂CS2和极性溶 剂1,2二氯乙烷中243–293 K的温度范围内的共振拉曼光谱. 结果表明, 溶质和溶剂的极性对拉曼光谱影响很大. 非极性分子β胡萝卜素在非极性溶剂CS2中的拉曼散射截面最大, 线宽最窄, 而极性分子角黄素在极性溶剂1,2二氯乙烷中的拉曼散射截面最小, 线宽最大. 用溶剂效应及线性多烯分子的“相干弱阻尼电子-晶格振动”, “有效共轭长度”模型给予了解释.
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| 关 键 词： | 溶剂效应 拉曼散射截面 线性多烯分子 |
| 收稿时间： | 2012-07-11 |
Effect of molecule polarity on the resonance raman spectrum of caroteniod |
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| Wu Yong-Ling,Liu Tian-Yuan,Sun Cheng-Lin,Qu Guan-Nan,Li Zuo-Wei.Effect of molecule polarity on the resonance raman spectrum of caroteniod[J].Acta Physica Sinica,2013,62(3):37801-037801. |
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| Authors: | Wu Yong-Ling Liu Tian-Yuan Sun Cheng-Lin Qu Guan-Nan Li Zuo-Wei |
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| Institution: | 1. State Key Laboratory of Superhard Materials, Changchun 130012, China;
2. College of Physics, Jilin University, Changchun 130012, China |
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| Abstract: | The resonance Raman spectra of nonpolar molecule all-trans-β-carotene and polar molecule canthaxanthin in nonpolar CS2 and polar 1,2-dicholoroethane in a temperature range from 243K to 293K are measured. The results show that polarities of the solute and solvent have a great effect on Raman spectrum. Raman scattering cross-section of nonpolar all-trans-β-carotene in nonpolar solvent CS2 is biggest and its bandwidth is narrowest. Raman scattering cross-section of polar canthaxanthin in polar solvent 1,2-dicholoroethane is smallest and its bandwidth is widest. The experimental phenomena are explained by solvent effects, coherent weakly damped electron-lattice vibration and effective conjugated length. |
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| Keywords: | solvent effects Raman scattering cross-section linear polyenes molecules |
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