γ-氨基丁酸在银胶体表面的表面增强拉曼光谱

Biospectroscopy Pub Date : 1998-12-07 DOI:10.1002/(SICI)1520-6343(1997)3:6<449::AID-BSPY4>3.0.CO;2-W

J. L. Castro, S. Sanchez-Cortes, J. V. Garcia Ramos, J. C. Otero, J. I. Marcos

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引用次数: 20

摘要

记录并分析了γ-氨基丁酸(GABA)吸附在银胶体上的表面增强拉曼光谱(SERS)。当浓度大于10−3 M时，吸附的物质为氨基酸的阴离子形式，通过两个官能团与表面相互作用。根据光谱的振动解释，假设在浓度为或小于10−3 M时，GABA发生化学转化，随着稀释而增加，并且记录的光谱是阴离子形式的氨基酸与化学转化产生的产物之间竞争吸附的结果。©1997 John Wiley &儿子,Inc。生物光谱学学报，2003,19 (3):449-455

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Surface-enhanced Raman spectroscopy of γ-aminobutyric acid on silver colloid surfaces

The surface-enhanced Raman spectroscopy (SERS) of γ-aminobutyric acid (GABA) adsorbed on silver colloids in H₂O and D₂O were recorded and analyzed. When the concentration is greater than 10⁻³ M, the adsorbed species is the anionic form of the amino acid that interacts with the surface through both functional groups. According to the vibrational interpretation of the spectra, it is assumed that at concentrations in the order of or less than 10⁻³ M, GABA undergoes chemical transformations, which increase upon dilution, and spectra are recorded that are the result of the competitive adsorption between the amino acid in its anionic form and the products resulting from the chemical transformations. © 1997 John Wiley & Sons, Inc. Biospectroscopy 3: 449–455, 1997

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Biospectroscopy

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