title: FT-IR, FT-Raman and FT-SERS spectra of 4-aminosalicylic acid sodium salt dihydrate.
abstract: FT-IR, FT-Raman and FT-SERS spectra of 4-aminosalicylic acid sodium salt dihydrate (4ASAS) have been recorded and analysed. The vibrational bands due to NH2, OH, carboxyl group, and the benzene ring are identified. The CX ipb(17a, 17b), CC ipb(6,18a) and CH ipb (3,14a, 14b) bands are more enhanced in SERS. Broadening of the inplane carboxyl bend indicates interaction with the silver surface. Further the vC=O, v(C-O)c and v(C-O)h are intense in the SERS spectrum. The rocking and wagging modes of NH2 also show up in SERS. The molecule (O, N donor ligand) is thought to adsorb through the carboxyl oxygen atom with the benzene ring in a 'perpendicular side on orientation' with respect to the silver surface.
authors.affiliation: Department of Physics, TKM Arts and Science College, Kollam, India.
authors.forename: C Yohannan
authors.initials: CY
authors.lastname: Panicker
authors.forename: Hema Tresa
authors.initials: HT
authors.lastname: Varghese
authors.forename: Annamma
authors.initials: A
authors.lastname: John
authors.forename: Daizy
authors.initials: D
authors.lastname: Philip
authors.forename: Krisztina
authors.initials: K
authors.lastname: Istvan
authors.forename: Gabor
authors.initials: G
authors.lastname: Keresztury
mesh_terms: D010131:Aminosalicylic Acid / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D010131:Aminosalicylic Acid