Ushizawa K, Yimit A, Ueda T, Tsuboi M
Department of Chemistry, Meisei University, Tokyo, Japan.
Nucleic Acids Symp Ser. 1997(37):37-8.
Polarized Raman scattering measurements have been made of a single crystal of adenine dihydrochloride (adenine-2H+) by the use of Raman microscope with 488.0 nm excitation. The adenine-2H+ crystal belongs to the space group Pnma (orthorhombic), and Raman intensities of Iaa, Ibb, Icc and Iac (which correspond to the aa, bb, cc and ac components of the crystal Raman tensor) have been determined for each Raman band. The depolarization ratios of Raman bands have been observed for fully random molecular orientations in an adenine 6N HCl aqueous solution. From these experimental data, and by taking the known crystal structure into account, anisotropic and isotropic molecular Raman scattering tensors have been determined for each vibrational mode of the adenine residue.
使用配备488.0 nm激发光源的拉曼显微镜对二盐酸腺嘌呤（腺嘌呤 - 2H⁺）单晶进行了偏振拉曼散射测量。腺嘌呤 - 2H⁺晶体属于空间群Pnma（正交晶系），已针对每个拉曼谱带确定了Iaa、Ibb、Icc和Iac的拉曼强度（它们分别对应于晶体拉曼张量的aa、bb、cc和ac分量）。在腺嘌呤6N HCl水溶液中，对完全随机的分子取向观察了拉曼谱带的退偏比。根据这些实验数据，并考虑已知的晶体结构，已为腺嘌呤残基的每个振动模式确定了各向异性和各向同性的分子拉曼散射张量。
