FT-IR, FT-Raman and FT-SERS spectra of 4-aminosalicylic acid sodium salt dihydrate

C. Yohannan Panicker, Hema Tresa Varghese, Annamma John, Daizy Philip, Krisztina Istvan, Gabor Keresztury

Research output: Contribution to journalArticle

52 Citations (Scopus)

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 νC=O, ν(C-O)c and ν(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.

Original languageEnglish
Pages (from-to)281-287
Number of pages7
JournalSpectrochimica Acta - Part A Molecular and Biomolecular Spectroscopy
Volume58
Issue number2
DOIs
Publication statusPublished - Jan 15 2002

Keywords

  • 4-Aminosalicylic acid sodium salt dihydrate
  • Adsorption
  • FT-IR
  • FT-Raman
  • FT-SERS
  • Silver colloid

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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