EDTA and CN - Complexing Effect on the Kinetics, Spectral Properties, and Redox Properties of Ag 1 0 and Ag 2 + in Aqueous Solution

The first steps of silver clusters nucleation have been studied by pulse radiolysis in the presence of EDTA and CN - ligands. The successive rate constants and the transient absorption spectra corresponding to Ag 1 0 and Ag 2 + have been determined. It has been found that Ag 1 0 and Ag 2 + were complexed by the ligands. In addition to the usual charge-transfer-to-solvent (CTTS) bands, red shifted in the presence of EDTA and CN -, the complexed Ag 1 0 and Ag 2 + spectra exhibit an additional absorption band assigned to a metal-ligand-charge-transfer (MLCT). The red shift of the CTTS band of the silver atom, which is more pronounced when the ligand interaction is stronger, is correlated with the ligand-induced redox properties of the monomeric silver couple.