温度对短链多烯生物分子β胡萝卜素拉曼光谱的影响

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (9): 1864.

温度对短链多烯生物分子β胡萝卜素拉曼光谱的影响

王微微^1,2, 李亮², 李占龙², 孙成林^1,2, 欧阳顺利², 许大鹏², 曲冠男², 里佐威^1,2, 高淑琴², 曹军胜³, 郜峰利⁴, 周强¹

1. 吉林大学超硬材料国家重点实验室, 长春 130021;
2. 吉林大学物理学院, 长春 130023;
3. 中科院长春精密仪器与物理研究所, 长春 130033;
4. 吉林大学集成光电子国家重点联合实验室, 长春 130012

收稿日期:2009-11-30 出版日期:2010-09-10 发布日期:2010-09-10
通讯作者: 孙成林, 男, 博士, 副教授, 主要从事分子光谱研究. E-mail: chenglin@jlu.edu.cn
基金资助:
国家自然科学基金(批准号： 10774057, 10974067), 集成光电子国家重点联合实验室开放课题(批准号: IOSKL-KF200908), 吉林大学超硬材料重点实验室开放课题(批准号: 201008), 吉林大学研究生创新基金资助项目(批准号: 20101046)资助.

Effect of Temperature on the Raman Spectrum of Short-chain Polyenes Biological Molecules β-Carotene

WANG Wei-Wei^1,2, LI Liang², LI Zhan-Long², SUN Cheng-Lin^1,2*, OUYANG Shun-Li², XU Da-Peng², QU Guan-Nan², LI Zuo-Wei^1,2, GAO Shu-Qin², CAO Jun-Sheng³, GAO Feng-Li⁴, ZHOU Qiang¹

1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130021, China;
2. College of Physics, Jilin University, Changchun 130023, China;
3. Lab of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
4. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

Received:2009-11-30 Online:2010-09-10 Published:2010-09-10
Contact: SUN Cheng-Lin. E-mail: chenglin@jlu.edu.cn
Supported by:
国家自然科学基金(批准号： 10774057, 10974067), 集成光电子国家重点联合实验室开放课题(批准号: IOSKL-KF200908), 吉林大学超硬材料重点实验室开放课题(批准号: 201008), 吉林大学研究生创新基金资助项目(批准号: 20101046)资助.

摘要/Abstract

摘要： 用Gobin Yvon hr800拉曼光谱仪及与之相连接的Linkam, Thms600加热装置, 测量了含9个C-C共轭双键的β胡萝卜素分子在二甲基亚砜中在25~73 ℃范围内的拉曼光谱. 结果表明, 短链多烯生物分子β胡萝卜素在液体中有很大的拉曼散射截面[6.5×10^-23 cm²/(molecule?Sr)], 除共振效应外, β胡萝卜素分子结构有序产生较强的弱阻尼C-C键相干振动, 是获得大拉曼散射截面的重要因素. 温度对多烯类链状线性分子结构有序性影响很大. 温度升高, 分子结构有序性下降, C-C键弱阻尼相干振动减弱, C-C键长变短, 各C-C键键长略有不同, 使拉曼散射截面减少, 拉曼光谱谱线蓝移, 振动频率成分增加使线宽增加.

关键词: 分子结构有序, 拉曼散射截面, 蓝移, 多烯分子

Abstract: Raman spectra of β-carotene with 9 conjugated double bonds polyenes bioligical molecules were measured in dimethyl sulfoxide(DMSO) solution, at temperature range from 298 K to 346 K(25—73 ℃) in this experiment by Gobin Yvon hr800 Raman spectrometer commreted Linkam, Thms600 heating device. The results show that short-chain polyenes biological molecules β-carotene have larger Raman scattering cross section[6.5×10^-23 cm²/(molecule?Sr)]. Besides resonance effect, the molecular structural order of β-carotene, which can generate coherent weak damping C-C bond vibration is an important factor, can lead to high Raman scattering cross section. The temperature has great effect on polyenic linear molecular structural order. Due to the temperature increases, the molecular structural order of β-carotene decreases, which lead to the weak of coherent weakly damping C-C bond vibration, the C-C bond length changes short. Because the C-C bond length is slightly different, the Raman scattering cross section decreases. And the frequency shifts towards higher frequencies, the frequency components of vibration increase, and the Raman linewidth becomes broadened.

Key words: Molecular structural order, Raman scattering cross-section, Blue shift, Polyenes molecule

TrendMD:

王微微, 李亮, 李占龙, 孙成林, 欧阳顺利, 许大鹏, 曲冠男, 里佐威, 高淑琴, 曹军胜, 郜峰利, 周强. 温度对短链多烯生物分子β胡萝卜素拉曼光谱的影响. 高等学校化学学报, 2010, 31(9): 1864.

WANG Wei-Wei, LI Liang, LI Zhan-Long, SUN Cheng-Lin*, OUYANG Shun-Li, .... Effect of Temperature on the Raman Spectrum of Short-chain Polyenes Biological Molecules β-Carotene. Chem. J. Chinese Universities, 2010, 31(9): 1864.

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