中文摘要：

为获得非共轭连接的供体（D）与受体（A）结构对环金属配合物的光电性能影响的关系，设计合成了一类新型的基于咔唑和嗯二唑功能基的D-A型环金属铱配合物，并研究了这类材料的光电性能．研究结果显示：这类磷光材料与母体化合物二[2-（4’，6＇-二氟苯基）吡啶-C^2,N’]（吡啶-2-甲酸）合铱（Ⅲ）[（dfppy）2Ir（pic）]相比，具有更好的热稳定性、更强的红移紫外吸收峰、更高的荧光量子效率以及改善的电化学和电致发光性能．它们在CH2C12中的最大紫外吸收波长为297nm．最大发光波长为476nm；在固态下的最大发光波长红移至（526±6）nm；其中环金属铱配合物（t-Bu．OXDdfppy）2Ir（pic—Cz）在聚合物发光器件中的发光效率为2．5cd／A，远远高于（dfppy）2Ir（pic）器件的发光效率．

英文摘要：

To obtain the rule of influence of donor（D）-acceptor（A） structures attached into iridium complexes by a non-conjugated connection on the optoelectronic properties of their iridium complexes, a series of cyclometalated iridium（Ⅲ） complexes with D-A structures containing carbazole and oxadiazole units were synthesized, and their optoelectronic properties were also investigated. The results show that these D-A based iridium complexes exhibited better thermal stability, more intense red-shifted UV absorption peak, higher emission quantum yield, as well as improved electrochemical and electroluminescence properties, compared with the classical di[2-（4＇,6＇-diflurophenyl） pyridine-C2,N＇]（piconilic acid） iridium（Ⅲ）. Their maximum UV absorption and emission peaks located respectively at around 297 nm and 476 nm in dichloromethane, but the maximum emission peak shifted to （520±6） nm in their neat films. In these iridium complexes, （t-Bu-OXDdfppy）2Ir（pic-Cz） presented a current efficiency of 2.5 cd/A in its doped polymer light-emitting devices, which is higher than that of the （dfppy）2Ir（pic） doped device with the same device configuration.