THE INTERACTION MECHANISM OF METHIONINE AND CHEMICAL SENSITIZERS

doi:10.7517/j.issn.1674-0475.2001.01.19

Abstract

Abstract: The changes of the chemical states and the relative contents of sulfur, gold, carbon and oxygen after methionine reacted with different chemical sensitizers are studied by ESCA scanning technique of X-ray Photoelectron Spectroscopy(CPS). The results indicated that the interaction mechanism of methionine reacted with different chemical sensitizers is not identical. Any oxidation-reduction reaction did not occurred between methionine and sulfur sensitizer, they could coexist steadily in the same system. The methionine was oxidized to methionine sulfoxide, in the same time reducing Au³⁺ to gold atom. The hydroxy of methionine could coordinate Au, forming Au-O-C coordinate metal complex. After S⁺Au sensitizers had been immersed into methionine system, oxidation-reduction reaction occurred between added thiosulfate and Au³⁺, methionine could coordinate Au which was reduced by sulfur sensitizer, also forming Au-O-C coordinate metal complex.

Key words: methionine, chemical sensitizer, X-ray photoelectron spectroscopy

CLC Number:

TQ57

ZHANG Yi-heng, FENG Shao-hong, GONG Zhu fang 1, YAN Tian-tang, YU Shu-qin 2 (Department of Applied Chemistry, 1 Department of Modern Physics, 2 Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R.. THE INTERACTION MECHANISM OF METHIONINE AND CHEMICAL SENSITIZERS[J]. Imaging Science and Photochemistry, 2001, 19(1): 19-28.

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