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Effect of Pb 2+ on L‐glutathione monolayers on a silver surface investigated by surface‐enhanced Raman scattering spectroscopy
Author(s) -
Sheng Chun,
Zhao Han,
Gu Fukang,
Yang Haifeng
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2277
Subject(s) - monolayer , chemistry , raman spectroscopy , molecule , raman scattering , covalent bond , glutathione , imine , spectroscopy , self assembled monolayer , crystallography , adsorption , photochemistry , analytical chemistry (journal) , organic chemistry , biochemistry , physics , quantum mechanics , optics , enzyme , catalysis
Surface‐enhanced Raman scattering (SERS) spectroscopy was applied to observe reduced L ‐glutathione [L‐Glut(R)] molecules self‐assembled on a silver surface and the effect of Pb 2+ on them. The adsorption structure suggests that the mercapto group of the L‐Glut(R) molecule is covalently bonded to the silver surface along with the imine group, amino group and entire carboxyl group in a perpendicular orientation after self‐reorganization. Results of SERS experiment show that Pb 2+ influences the structure of L‐glutathione monolayers as a result of the binding reaction possibly occurring between Pb 2+ and the carboxyl and the amino groups. Copyright © 2009 John Wiley & Sons, Ltd.