Synthesis And Luminescent Properties Of Polymeric Metal Complexes Coordinated With Carbazole Derivatives

Polymeric metal complexes which were combined metal with free ligand by chemical bonds used as luminescent materials possess well optical performance like the metal complexes, and these OELM's also have processability, good thermal stability, and easy film-forming. To improve the OELD's electroluminescent performance and optimize the fabrication of the light emitting diodes, it is nessecery to balance the ejection of the charge, so the researchers offormed a novel method to synthesize such a optical materials which contain hole-transporting group and a electron-transporting group at the same time, and it is possible to fabricate light emitting diodes from multilayer diode to single layer diode, which provide the new direction of OLED's development.At present, organic electroluminescent devices have been developed for practicality and dommodity, but it still need further improve in brightness, efficiency, lifetime and fabrication. Because the mobility and the stability of many charge transport compounds are lower, it has grown a new field in which organic compounds with stronger withdrawing-electron group and conjugating system have been synthesized. In other words, the multi-function groups of different molecules can be assembled and form a kind of new molecule. Carbazole derivatives are widely used as hole-transporting materials, which definitely hinder the crystallization process and thus prolong their lifetime values, and meanwhile increase the hole transporting bility. The metal complexes of 1,10-phenathroline and 8-hydroquinoline are typical electron-transporting material and emit-lighting material. They copolymerizing with carbazole ring can balance the injection of the electron/hole and increase the electron/hole-transporting valities, even to improve efficency of emitting light. The luminescent materials possessing tri-function must easy the manuscription of the device.Based on the above idea, in this paper two novel series of ligands and the corresponding main-chain metal coordination polymers possessing hole-electron transporting ability are synthesized through carbazole, phenathroline and 8-hydroquinoline:(1) Synthesis of a conjugated ligand 3,6-Bis(1,10-phenanthroline-[5,6-f] imidazole-2-yl)carbazole Bpic containing carbazole and 1,10-phenthroline by appropriate reaction route, the structure was characterized by IR, 1HNMR, and elementary analysis;(2) Synthesis of the corresponding metal polymeric complexes Bpic-Cu(II) (1) and Bpic-Zn(II) (2), the structure was characterized by IR, GPC and EA, the data suggests that their molecular formula are [(C42H29N9)4(CuCl2)5] and [(C42H29N9)4(ZnCl2)5], and studied their optical and thermal properties;(3) Synthesis of ligand 3,6-bis(8-hydroxyquinoline-5-propenyl)-N-butyl -carbazole Bqpc containing carbazole and 8-hydroquinoline through wittig reaction. The structures were characterized by IR, 1HNMR and EA;(4) Synthesis of the corresponding metal polymeric complexes Bqpc-Cu(II) (3) and Bqpc-Zn(II) (4), the structure was characterized, the data indicates that their molecular formula are [(C38H29N3O2)5(CuCl2)6] and [(C38H29N3O2)5(ZnCl2)6], and studied their optical and thermal properties.