纳米团簇
拉曼散射
化学
拉曼光谱
磺胺
吸附
脱质子化
金属
分子
银纳米粒子
光化学
结晶学
无机化学
分析化学(期刊)
物理化学
纳米颗粒
材料科学
有机化学
离子
纳米技术
物理
光学
生物化学
作者
José L. Castro,María Rosa López-Ramírez,Juan F. Arenas,Juan C. Otero
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 ν s (OSO), ν(CS), and ν(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 –NH 2 and –SO 2 NH – groups in the para ‐position. Additionally, it was found that the most enhanced surface‐enhanced Raman scattering bands, especially the 8a;ν ring mode, are related to the presence of the charge transfer mechanism. Copyright © 2011 John Wiley & Sons, Ltd.
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