丙氨酸对映体单晶的变温偏振激光拉曼光谱研究  

Temperature-Dependent Polarized Raman Study of D- and L-Alanine Single Crystals

作　　者：龚 易芳[1] 王文清[1] 

机构地区：[1]北京大学化学学院应用化学研究所,北京100871

出　　处：《光散射学报》2002年第3期145-149,共5页The Journal of Light Scattering

摘　　要：本文测量了在不同偏振状态下 ,D 和L 丙氨酸的变温拉曼光谱。我们发现 :1 丙氨酸对映体的非偏振拉曼光谱图极其相似。 2 着重研究了D 丙氨酸偏振拉曼光谱随温度变化的特点。 3 通过拉曼光谱的手段 ,我们未发现A Salam所预言的在 2 5 0K左右从D 丙氨酸→丙氨酸的二级相变。Vibration spectra of D- and L-alanine single crystals were studied by Raman spectroscopy at temperatures ranging from 200 to 300 K. It has been found that the unpolarized Raman spectra of D- and L-alanine are similar. The laser beams with different polarization have different selection rules for Raman spectra of D-Alanine. It was not observed a phase transition from D- to L-alanine predicted by A. Salam around 250K in Raman spectra.

关 键 词：丙氨酸对映体单晶 变温偏振拉曼光谱 手性分子 氨基酸 D-丙氨酸 L-丙氨酸 

分 类 号：O629.7[理学—有机化学] Q51[理学—化学]