| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1250286 | Vibrational Spectroscopy | 2011 | 8 Pages |
Surface-enhanced infrared absorption (SEIRA), temperature-programmed desorption, and density functional theory calculations were used to explore the adsorption of aminophenol isomers on vacuum deposited silver films and silver powder. Salts of the aminophenolate ions were synthesized to aid in vibrational spectral interpretation. No evidence for dissociation of any of the aminophenols into aminophenolate ions in the monolayer or multilayer was found when adsorbed on silver nanostructures (SNS). SEIRA demonstrated additional hydrogen-bonding interactions in a multilayer of 2-aminophenol and 3-aminophenol adsorbed on SNS beyond what is present in the aminophenol powders. Surface-enhanced Raman spectroscopy (SERS) experiments also showed that a 2-aminophenol monolayer adsorbed on SNS is photolytically oxidized to either 3-aminophenoxazone or 2,2′-dihydroxyazobenzene, while neither 3-aminophenol nor 4-aminophenol showed any SERS activity. This work is expected to have a significant impact in a range of environmental, biochemical, and industrial applications where phenol chemistry is important.
