Adsorption mechanism of 2-amino,5-nitropyrimidine on silver substrates, as detected by surface-enhanced Raman scattering

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• 作者：Muniz-Miranda ; Maurizio
• 关键词：2-Amino ; 5-nitropyrimidine ; Surface-enhanced Raman scattering ; Ag hydrosol
• 刊名：Vibrational Spectroscopy
• 出版年：2002
• 出版时间：July 5, 2002
• 年：2002
• 卷：29
• 期：1-2
• 页码：229-233
• 全文大小：105 K

文摘

The adsorption of 2-amino,5-nitropyrimidine (ANPM) on silver has been investigated by surface-enhanced Raman scattering (SERS). The ligand adsorbs as neutral molecule, but the interaction changes with the pH of the Ag hydrosol. In alkaline medium the binding occurs through a nitrogen atom of the aromatic ring. When coadsorbed hydroxide ions are removed from the metal surface, the molecule interacts with the substrate via nitro group. This occurs in Ag hydrosol at neutral pH and on filters coated with colloidal silver. The use of Ag-coated filters in the SERS measurements has contributed to the understanding of the adsorption mechanism.