中文摘要：

合成了一组新型的带有烷氧基团的铱（Ⅲ）配合物[Ir（RO—PPPY）3]，并进行了结构表征．该组配合物在-496nm处有较强的三重态发射，磷光量子产率为0．4—0．6，三重态寿命为2—4us．结果表明，连接了长链的配合物可减少分子间的聚集，可以用作有机电致发光器件中的磷光材料．

英文摘要：

Heavy metal complexes as the highly efficient phosphorescent emitters in organic light emitting diodes（OLEDs） have been extensively studied in recent years. The complexes containing Ir（ Ⅲ ） have usually been modified to further improve electroluminescence（EL） efficiency. In our previous work, Ir（pppy）3 [ tris （5-phenyl-10,10-dimethyl-4-aza-tricycloundeca-2,4,6-triene） iridium] was synthesized by introducing pinene group as a spacer to decrease concentration quenching and showed good EL performances. In the present work, we studied the modified Ir（pppy） 3 by attaching side alkoxy group to the pinene-2-phenylpyridine ligand, which is hoped to improve the chemical compatibility with host and further inhibit phase segregation in polymer matrix. The new series of Ir（ Ⅲ ） complexes [ Ir（RO-pppy） 3] were synthesized and the photophysical properties were investigated. Strong triplet emission peak at around 496 nm was observed with phosphorescence quantum yield ФF = 0.4-0. 6, emission lifetimes T = 2-4 us. Complex 8 [ Ir（ C16 H33 O-pppy） 3 ] has special photophysical properties： no blue-shift on going from room temperature（298.15 K） to 77 K was observed and with relatively less part of long-lifetime in decay process. The results indicate that the complex with long side chains can reduce the aggregation between molecules, thus can be used as promising efficient phosphorescent emitter in OLEDs.