Citation: Chu Gao-Sheng, Song Qin-Hua, Wang Zhong-Yi, Ge Xue-Wu, Zhang Zhi-Cheng, Wang Wen-Feng, Yao Si-De. Laser Flsah Photolysis Study of Cyclic-Phe-His in Aqueous Solution[J]. Acta Physico-Chimica Sinica, 2000, 16(03): 232-237. doi: 10.3866/PKU.WHXB20000308
环-Phe-His二肽水溶液的激光光解
English
Laser Flsah Photolysis Study of Cyclic-Phe-His in Aqueous Solution
Photolysis and photosensition of cyclic-phenylalanine-histidine(cyclic-Phe-His) in aqueous solution were studied using KrF laser flash photolysis (248nm). Photoionization and photodissociation of cyclic-Phe-His in Phe-site occured and the charateristic absorption at 320nm and 410nm have been observed. From changes of the absorption peaks and kinetic analysis, the reaction mechanism of photoionization and photodissociation has been suggested, a series of kinetic parameters have been obtained. Using acetone as a photosensitizer, and N3• as an oxidant by pulse radiolysis method, the induced oxidation of cyclic-Phe-His in aqueous solution has been also reported in this paper, results similar to the photoionization of cyclic-Phe-His have been found.
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