Surface-enhanced raman spectroscopy (SERS) of ligands and their complexes on silver sols—I. Maltol, tropolone and their complexes with group VIII and group VI metals

Abstract

New complexes of the form trans-OsO 2(malt) 2, trans-UO 2(malt) 2 and cis-MoO 2(malt) 2, M(malt) 3 and [M′(malt)(PPh 3) 2] + (Hmalt = maltol, M = Ru, Rh, M′= Pd, Pt) are reported together with their vibrational, 1H and 13C NMR and mass spectra. SER spectra from Ag sols of maltol, Ru(malt) 3, tropolone and Rh(trop) 3 (Htrop = tropolone) are reported, and the possible nature of the adsorbed species responsible for the enhanced spectra is briefly discussed.