| Abstract: | Synthesis and Properties of the Diphthalocyaninates of Yttrium and Indium Blue di(phthalocyaninato(2–))metalates of tervalent yttrium and indium are obtained by the reaction of yttrium acetate or anhydrous indium chloride with molten phthalodinitrile in the presence of potassium methylate and isolated as complex salts with organic cations. Anodic oxidation of (nBu4N)M(Pc2?)2] (M = Y, In) yields crystals of green paramagnetic di(phthalocyaninato)metal(III)-dichloromethane solvate, M(Pc)2] · CH2Cl2 (μeff = 1.8/1.9 B.M. (Y/In)). Red brown di(phthalocyaninato)metal(III)-polybromide, M(Pc?)2]Brx is prepared by oxidation with bromine in excess. The redox properties of the di(phthalocyaninato)metalates(III) are investigated by cyclic voltammetry and difference pulse polarography. A quasi reversible (ΔE ? 60 mV) one electron process at 0.09 V (Y) and ?0.07 V (In) is assigned to the redox couple M(Pc2?)2]?/M(Pc)2]. Electronic absorption spectra as well as MIR/FIR and resonance Raman spectra are reported. The characteristic features of the three oxidation states and the influence of the ionic radius and the electron configuration of the metal ion are discussed. |
