Abstract
Diarylgallium complexes of composition, [Ar2GaOC6H3(N=NPh)(CH=NAr’)], (Ar = Ph or tol; Ar’ = Ph, tol-4 or C6H4Br-4) have been synthesized by treatment of triaryl-gallium dioxane adduct with azo linked salicylaldimine Schiff bases in benzene. These complexes have been characterized by elemental analysis, IR, UV-Vis, NMR (1H and 13C{1H}) spectroscopy. The molecular structures of [Ph2GaOC6H3(N=NPh)(CH=NPh)] (2a) and [Ph2GaOC6H3(N=NPh)(CH=Ntol-4)] (2b) were established by X-ray crystallography. The complexes are discrete monomer with four coordinated gallium atom forming a distorted tetrahedral structure. Photoluminescence studies of these complexes showed that the quantum yield is always higher than that of the corresponding ligands and the emission peaks of complexes are blue shifted with respect to ligand.
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