Synthesis, structures and photophysical properties of luminescent copper(I) and platinum(II) complexes with a flexible naphthyridine-phosphine ligand

Condensation of Ph2PH and paraformaldehyde with 2-amino-7-methyl-1,8-naphthyridine gave the new flexible tridentate ligand 2-[N-(diphenylphosphino)methyl]amino-7-methyl-1,8-naphthyridine (L). Reaction of L with [Cu(CH3CN)(4)]BF4 and/or different ancillary ligands in dichloromethane afforded N,P chelating or bridging luminescent complexes [(L)(2)Cu-2](BF4)(2), [(mu-L)(2)Cu-2(PPh3)(2)](BF4)(2) and [(L)Cu(CNN)]BF4 (CNN = 6-phenyl-2,2'-bipyridine), respectively. Complexes [(L)(2)Pt]Cl-2, [(L)(2)Pt](ClO4)(2) and [(L)Pt(CNC)]Cl (CNC = 2,6-biphenylpyridine) were obtained from the reactions of Pt(SMe2)(2)Cl-2 or (CNC)Pt(DMSO)Cl with L. The crystal structures and photophysical properties of the complexes are presented.