Surface-enhanced Raman scattering of benzenesulfonamide and sulfanilamide adsorbed on silver nanoparticles

被引：11

作者：

Luis Castro, Jose ^{[1
]}

Rosa Lopez-Ramirez, Maria ^{[1
]}

Francisco Arenas, Juan ^{[1
]}

Carlos Otero, Juan ^{[1
]}

机构：

[1] Univ Malaga, Dept Phys Chem, Fac Sci, E-29071 Malaga, Spain

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2012年 / 43卷 / 07期

关键词：

SERS; silver colloid; benzenesulfonamide; sulfanilamide; charge transfer; CHARGE-TRANSFER MECHANISM; PARA-AMINOBENZOIC ACID; AB-INITIO CALCULATIONS; VIBRATIONAL-SPECTRA; MOLECULAR-STRUCTURE; CARBOXYLIC-ACIDS; METAL-COMPLEXES; SOL; ELECTRODE; SPECTROSCOPY;

D O I：

10.1002/jrs.3107

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The Surface-enhanced Raman scattering of benzenesulfonamide and sulfanilamide adsorbed on silver sols was studied. On the basis of the noticeable shifts observed for wavenumbers of the ?s(OSO), ?(CS), and ?(SN) vibrations with respect to the Raman spectra of the solids and the ionic solutions, we conclude that these molecules are adsorbed on silver nanoclusters at pH?=?7 with the aminosulfonyl groups partially deprotonated. The benzenesulfonamide links to the metal through the nitrogen atom of the corresponding azanion, while the sulfanilamide interacts in turn through the nitrogen atoms of the NH2 and SO2NH groups in the para-position. Additionally, it was found that the most enhanced surface-enhanced Raman scattering bands, especially the 8a;?ring mode, are related to the presence of the charge transfer mechanism. Copyright (c) 2011 John Wiley & Sons, Ltd.

引用

页码：857 / 862

页数：6

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