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A fully conjugated ligand 3,6-bis (8-hydroxyquinoline-5-propenyl)- N -butyl-carbazole (B8QPC) containing hole- and electron-transporting groups was firstly synthesized through the Wittig condensation polymerization. Corresponding polymeric complexes, B8QPC ( 1 ) with Cu(II) ( 2 ) and Zn(II) ( 3 ), were synthesized and characterized by FT-IR, elemental Analysis, conductivity measurement and gel permeation chromatography (GPC). GPC indicated that the number average molecular weights ( M n ) are about 3800 and the degree of polymerization ( n ) are about 5 for the polymeric complexes 2 and 3 . UV–vis and fluorescence spectra at room temperature revealed that both the polymeric complexes 2 and 3 emit blue luminescence at 473 and 513 nm ( λ em,max ) in DMSO solution and blue/green luminescence at 522 and 531 nm ( λ em,max ) in solid state, respectively. Thermal property measurements show that they have good thermal stability.

A novel ligand 3,6-bis(1,10-phenathroline-[5,6-d] imidazole-2-yl)carbazole (Bpic) containing hole- and electron-transporting groups was firstly designed. Its polymeric complexes of Bpic with Cu(∥), Zn(∥) were successfully synthesized. The UV-vis absorption, fluorescence spectra and thermal properties of these complexes were investigated. At room temperature, complexes 2, 3 emit blue luminescence from 445 to 485 nm in DMSO solution, and emit green/yellow and orange luminescence from 523 to 585 nm in solid state. In comparison with the free ligand, the polymeric complexes exhibit a bathochromic shift. It can be assigned to the extended π-conjugation of the complexes.

The polymeric complexes of 4,4′-bis[2-(2′-pyridyl)benzimidazolyl]biphenyl (Bmbp) with Co(II) (1), Ni(II) (2) and 1,3,5-tris[2-(2′-pyridyl)benzimidazolyl]benzene (Tmb) with Co(II) (3), Ni(II) (4) were successfully synthesized and characterized by using IR spectroscopy, elemental analysis, and gel permeation chromatography (GPC) analysis. Their cyclic voltametric behavior and thermal property were also studied. The results indicated these complexes display an irreversible redox process and have high thermal stability.