电荷转移络合物对β-胡萝卜素共振拉曼散射截面的影响

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (6): 1218.

电荷转移络合物对β-胡萝卜素共振拉曼散射截面的影响

孙成林^1,2, 张学亚², 李占龙², 周密², 欧阳顺利², 里佐威^1,2, 高淑琴², 周强²

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

收稿日期:2009-09-23 出版日期:2010-06-10 发布日期:2010-06-10
通讯作者: 里佐威, 男, 教授, 博士生导师, 主要从事分子光谱研究. E-mail: chenglin@jlu.edu.cn
基金资助:
国家自然科学资金(批准号: 10774057, 10974067)、吉林省科技厅项目(批准号: 20090534)和吉林大学超硬材料国家重点实验室开放课题(批准号: 201008)资助.

Effect of Complex Formation on Resonance Raman Scattering Cross Section of β-Carotene

SUN Cheng-Lin^1,2, ZHANG Xue-Ya², LI Zhan-Long², ZHOU Mi², OUYANG Shun-Li², LI Zuo-Wei^2*, GAO Shu-Qin², ZHOU Qiang²

1. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130021, China;
2. College of Physics, Jilin University, Changchun 130023, China

Received:2009-09-23 Online:2010-06-10 Published:2010-06-10
Contact: LI Zuo-Wei. E-mail: chenglin@jlu.edu.cn
Supported by:
国家自然科学资金(批准号: 10774057, 10974067)、吉林省科技厅项目(批准号: 20090534)和吉林大学超硬材料国家重点实验室开放课题(批准号: 201008)资助.

摘要/Abstract

摘要：

利用Vaspec-2048-2紫外光谱仪和Renishaw InVia 型共聚焦拉曼光谱仪, 测量了极性溶剂1,2-二氯乙烷碘溶液中的β-胡萝卜素的紫外-可见吸收光谱和拉曼光谱. 结果表明, 生成络合物的β-胡萝卜素在460 nm处的紫外-可见吸收峰消失, 并在1000 nm处出现β-胡萝卜素与碘形成络合物的吸收峰, 致使514.5 nm激光激发时观察不到络合物中C-C(C—C, CC)键的共振拉曼光谱. 而溶液中没有形成络合物的β-胡萝卜素的C-C键拉曼散射截面减小. 其机理为: β-胡萝卜素和碘溶液不稳定, β-胡萝卜素分子结构有序性减弱, 导致相干弱阻尼C-C键振动减弱, 使得其拉曼散射截面减小.

关键词: 拉曼散射截面; 络合物; β-胡萝卜素

Abstract:

β-Carotene is the polyenes linear biological molecule, which can form charge transfer complex in iodine solution. We measured the UV-Vis absorption and Raman spectra by the Avaspec-2048-2 spectrophotometer and the micro Raman spectrometer(Renishaw InVia Raman microscope), respectively. The result show that the UV-Vis absorption spectra at 460 nm of β-carotene disappeare in polar solvent 1,2-dichloroethane. And a new, intense absorption band of complex which was formed by β-carotene and iodine was found at 1000 nm. So the resonance Raman spectra of β-carotene in complex couldn′t be observed by 514.5 nm Laser. And Raman cross section of β-caroten that wasn′t in the complex reduced. Due to the solution of β-carotene and iodine was unstable, the molecule structural order of β-caroten weaked, which lead to the weak of coherent weakly damped C-C vibrations, and made the Raman scattering cross section reduced.

Key words: Raman scattering cross section; Complex; β-Carotene

TrendMD:

孙成林, 张学亚, 李占龙, 周密, 欧阳顺利, 里佐威, 高淑琴, 周强. 电荷转移络合物对β-胡萝卜素共振拉曼散射截面的影响. 高等学校化学学报, 2010, 31(6): 1218.

SUN Cheng-Lin*, ZHANG Xue-Ya, LI Zhan-Long, ZHOU Mi, OUYANG Shun-Li, ..... Effect of Complex Formation on Resonance Raman Scattering Cross Section of β-Carotene. Chem. J. Chinese Universities, 2010, 31(6): 1218.

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