Surface interactions of a homologous series of α,ω-amino acids on colloidal silver and gold

A. Akemi Ooka, Katherine A. Kuhar, Namjun Cho, Robin L. Garrell
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引用次数: 22

Abstract

Surface enhanced Raman spectroscopy (SERS) was used to characterize a homologous series of α,ω-amino acids on colloidal gold and silver. Raman and SER spectra of the α,ω-amino acids, NH2(CH2)nCOOH (n = 3–7), are presented and analyzed, revealing the probable conformations of the molecules on the metal surfaces. The α,ω-amino acids interact with silver and gold through both the amine and carboxylate end groups, and modify the conformation of the molecular backbone in order to maximize these interactions. An odd–even effect is observed for backbone conformations of molecules adsorbed to the silver substrate. The anomolous SER spectrum of 5-aminopentanoic acid on gold suggests the possibility of condensation polymerization at the gold surface. © 1999 John Wiley & Sons, Inc. Biospectroscopy 5: 9–17, 1999

同源系列α,ω-氨基酸在胶体银和胶体金上的表面相互作用
利用表面增强拉曼光谱(SERS)对胶体金和银上的α,ω-氨基酸同源序列进行了表征。对α,ω-氨基酸NH2(CH2)nCOOH (n = 3-7)的拉曼光谱和SER光谱进行了分析,揭示了分子在金属表面的可能构象。α,ω-氨基酸通过胺基和羧酸端基与银和金相互作用,并改变分子骨架的构象以最大化这些相互作用。对吸附在银底物上的分子的主链构象观察到奇偶效应。5-氨基戊酸在金表面的异常丝氨酸光谱表明金表面可能发生缩聚反应。©1999 John Wiley &儿子,Inc。生物光谱学学报,2003,19 (5):917 - 917
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