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Anomalous SERS of monocarboxylic acids on silver sols

✍ Scribed by J. L. Castro; J. C. Otero; J. I. Marcos

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
299 KB
Volume
28
Category
Article
ISSN
0377-0486

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✦ Synopsis

The systematic presence of a spectrum has been observed that has been termed anomalous SERS in the spectra on silver sols of a set of monocarboxylic acids, characterized by being independent of the adsorbate that is initially added and whose bands cannot be correlated with the respective Raman solution spectra. It has been conÐrmed that the presence of these bands depends on the length of the aliphatic chain, the values and the adsorbate concen-pK a tration. The di †erent structural possibilities that could explain these results are discussed from a vibrational point of view.

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## Abstract Surface‐enhanced Raman scattering spectra of 1‐phenyl‐5‐mercaptotetrazole (PMT) and of the corresponding sodium salt adsorbed on silver sols were recorded in the 3700–2800 and 1800–150 cm^βˆ’1^ regions. The SERS spectra obtained in both cases are the same, therefore it can be deduced that