VIBRATIONAL AND SURFACE-ENHANCED RAMAN-SCATTERING SPECTRA OF SULFAMICACID

The analysis of the Raman and FTIR spectra of sulfamic acid suggest a structure between that of zwitterion and molecular form. SERS spectra have been analyzed in two types of silver colloids. As S - O ..... Ag linkages are formed in one colloid, S = 0 fundamentals are enhanced in intensity and shifted in frequency. Appearance of a delta SOH band in dicates the retention of SOH bonds in the metal-molecule adsorbed syst em. Further, splitting of the fundamentals, which arises from the lowe ring of the symmetry of the molecule on adsorption, is noticed. In the second colloid, the nu S-O band is shifted in frequency and enhanced in intensity. No band corresponding to delta SOH is noticed, indicatin g the removal of protons and formation of S-O ..... Ag linkages. (C) 1 995 Academic Press, Inc.