中文摘要：

测量了室温（20。c）条件下极性溶剂1，2-二氯乙烷．碘溶液中的口胡萝卜素紫外．可见吸收光谱和拉曼光谱．结果表明，生成络合物的届胡萝卜素在460nm处的紫外．可见吸收峰消失，并在1000nm处出现p胡萝h素与碘形成络合物的吸收峰，致使514．5nm激光激发时察觉不到络合物中口胡萝卜素离子CC键的共振拉曼光谱．而溶液中没有形成络合物的口胡萝卜素CC键拉曼散射截面随络合物浓度增加而减小，拉曼光谱线宽增加，兀电子．声子耦合系数增加，其机理是随络合物增加溶液混乱程度增加、口胡萝卜素分子结构有序性减小所致，且可以用“相干弱阻尼电子．晶格振动”、“有效共轭长度”、“振幅模型”等理论给予解释．

英文摘要：

The uv-vis absorption and resonance Raman spectra of all-trans-~-carotene in polar solvent 1, 2-dichloroethane with iodine are measured at 293 K. The results indicate that the absorption peak of all-trans-13-carotene in the complex disappears at 460 nm and instead a new peak of the complex formed by all-trans-13-carotene and iodine is found at 1000 nm, so that the all-trans-/3-carotene within the complex cannot produce the resonance Raman spectrum by 514.5 nm excitation laser. The Raman scattering cross section of CC bonds of all-trans-~6-carotene taht does not form in complex decreases, its full bandwidth broadens and electron-phonon parameter increases with the increase of concentration of the complex, because when the concentration of the complex increases, the disorder increases in the solution and the molecular structural order decreases. These phenomena are analyzed using the coherent weakly damped electron-lattice vibration mode, the effective conjugation length mode as well as the theory of amplitude mode in this work.