氨基酸的光化学诱导动态核极化  

PHOTOCHEMICALLY INDUCED DYNAMIC NUCLEAR SPIN POLARIZATION OF AMINO ACIDS

作　　者：程凌江[1] 徐广智[1] 严宝珍[2] 袁汉成[2] 

机构地区：[1]中国科学院化学研究所北京分子动态与稳态结构国家实验室,北京100080 [2]北京化工学院应用化学系,北京100029

出　　处：《感光科学与光化学》1992年第3期279-283,共5页Photographic Science and Photochemistry

基　　金：杨振华有机化学博士后科学基金;国家自然科学基金

摘　　要：维生素B_2与氨基酸和氨基酸衍生物水溶液体系的光化学诱导动态核极化(photo chemically induced dynamic nuclear polarization, CIDNP)研究表明,在维生素B_2作为光敏化剂的体系中,N-乙酰-L-酪氨酸和N_α-乙酰-L-组氨酸显示很强的极化信号,A photochemically induced dynamic nuclear spin polarization (photo-CIDNP) study was presented of the amino acids that are polarisable with vitamin B? In the amino acid-vitamin B?systems with light irradiation, strong emission for 3-H, 5-H and enhanced absorption for 2-H, 6-H at the benzene ring of N-acetyl-L-tyrosine and enhanced absorption for the protons at the imidazole ring of N-acetyl-L-histidine were observed. No polarization was observed for other protons or protons at other amino acids and deriveatives. The CIDNP evidence indicates that the hydrogen-atom abstraction is important in generating radical pairs in the vitamin B2 sensitizing systems. Vitamin B2 was considered to be an excellent sensitizer and probe for the surface amino acid residues of proteins and enzymes.

关 键 词：化学诱导 核极化 氨基酸 维生素B2 

分 类 号：O629.7[理学—有机化学]