Synthesis, Structure and Luminescent Properties of Ti(III), V(III) Transition Metal Polymeric Macrocyclic Complexes Derived from Phenanthroline and Biphenyl Groups

A fully conjugated ligand 4,42-bis(1,10-phenanthroline-[ 5,6-d] imidazole-2-yl)-biphenyl based on 1,10-phenanthroline and biphenyl groups was firstly synthesized. The corresponding polymeric macrocyclic complexes with Ti(III) and V(III) were synthesized and characterized by FT-IR, elemental Analysis, conductivity measurement, UV-Vis and luminescence spectra at room temperature revealed that both the polymeric complexes emit blue luminescence at 453 and 452 nm (lambda(em, max)) in DMSO solution and blue/green luminescence at 527 and 536 nm (lambda(em, max)) in solid state respectively, and the maximum wavelengths of the polymeric complexes are red shifted, compared with the ligand. On the bases of study performed and discussed an octahedral environment seems to exist around metal ion in the complex