Reaction of Electron Transfer from Methionine-containing Dipeptides to Triplet 4-Nitroquinoline 1-Oxide

Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (7): 1067.

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Reaction of Electron Transfer from Methionine-containing Dipeptides to Triplet 4-Nitroquinoline 1-Oxide

XU Ye-Ping¹, SONG Qin-Hua¹, YU Shu-Qin¹, CHEN Cong-Xiang¹, MA Xing-Xiao¹, LIN Wei-Zhen², YAO Si-De²

1. Department of Chemical Physics, Open Laboratory of Selected-Bond Chemistry of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China;
2. Laboratory of Radiation Chemistry, Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China

Received:1999-08-25 Online:2000-07-24 Published:2000-07-24

Abstract

Abstract: Photochemical reactions of 4-nitroquinoline 1-oxide(4NQO) with methionine-containing dipeptides Met-Met, Ala-Met, Met-Lue and Met-Gly have been studies by using 248 nm laser flash photolysis. The formation of α-alkyl radicals was observed, and their rate constants of formation were obtained. The reaction mechanism that the α-alkyl radicals produced via an electron transfer process between triplet 4NQO and methionine-containing dipeptide was proposed.

Key words: 4-Nitroquinoline1-oxide, Methionine-containing dipeptides, Laser flash photolysis, Electron transfer

CLC Number:

O643.12

TrendMD:

XU Ye-Ping, SONG Qin-Hua, YU Shu-Qin, CHEN Cong-Xiang, MA Xing-Xiao, LIN Wei-Zhen, YAO Si-De. Reaction of Electron Transfer from Methionine-containing Dipeptides to Triplet 4-Nitroquinoline 1-Oxide[J]. Chem. J. Chinese Universities, 2000, 21(7): 1067.

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Reaction of Electron Transfer from Methionine-containing Dipeptides to Triplet 4-Nitroquinoline 1-Oxide

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