VIBRATIONAL AND ORIENTATION STUDIES OF 2,4-DIAMINO-6-PHENYL-1,3,5-TRIAZINE ON A COLLOIDAL SILVER SURFACE

The Raman, IR and SERS spectra of 2,4-diamino-6-phenyl-1,3,5-triazine (DPT) have been recorded. One protonated form of the DPT molecule was evidenced. The DPT molecule was found to adsorb on to a silver colloid al surface in either the neutral or the protonated form. Vibrational a ssignments are proposed for DPT and the DPT ion. Comparison of the Ram an spectra of DPT and the DPT ion in solution with the SERS spectra re sults in an orientation with the triazinic skeletal DPT plane perpendi cular on the Ag surface, The same orientation with more or less tilt w as found for the adsorbed DPT ion. (C) 1997 Elsevier Science B.V.