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The preparation, characterization and electrochemical and photophysical properties of a series of desymmetrized heteroleptic [Cu(P^P)(N^N)][PF6] compounds are reported. The complexes incorporate the chelating P^P ligands bis(2-(diphenylphosphanyl)phenyl)ether (POP) and (9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphane) (xantphos), and 6-substituted 2,2'-bipyridine (bpy) derivatives with functional groups attached by -(CH2) n - spacers 6-(2,2'-bipyridin-6-yl)hexanoic acid (1), 6-(5-phenylpentyl)-2,2'-bipyridine (2) and 6-[2-(4-pheny