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以立体位阻3-乙酰基樟脑为辅助配体合成了系列新型的环金属铱配合物3-乙酰基樟脑-2-(2,4-二氟)苯基吡啶环金属铱配合物[(46dfppy)2Ir(acam)],3-乙酰基樟脑-2-苯基吡啶环金属铱配合物[(ppy)2Ir(acam)],3-乙酰基樟脑-2-苯并噻吩吡啶环金属铱配合物[(btp)2Ir(acam)].将配合物的吸收光谱、光致发光光谱以及光致发光效率与辅助配体为乙酰丙酮(acac)的对应配合物进行了比较,发现在配合物中引入具有大空间位阻的3-乙酰基樟脑使配合物的光致发光效率均有所提高.并将(ppy)2Ir(acam)用于有机电致发光器件,电致发光光谱在516 nm处有一最大强度峰,驱动电压为12 V时最大亮度为10930 cd/m2,最大亮度效率达到14.6 cd/A,电压为10.7 V时最大功率为4.23 lm/W,亮度为698 cd/m2.
A series of novel iridium complexes, 3-acetyl-camphor-2- (2,4-difluoro) phenylpyridine, were synthesized by using sterically hindered 3-acetyl-camphor as an auxiliary ligand [46dfppy ) 2Ir (acam)], 3-Acetyl-camphor-2-phenylpyridine ring metal iridium complex [(ppy) 2Ir [(btp) 2Ir (acam)]. The absorption spectra, photoluminescence spectra and photoluminescence efficiency of the complexes were compared with the corresponding complexes of acetylacetone (acac) 3-Acetylcamphor with large steric hindrance increased the photoluminescence efficiency of the complex, and (ppy) 2Ir (acam) was used in the organic electroluminescent device. The electroluminescence spectrum has a The maximum intensity peak is 10930 cd / m2 at 12 V, the maximum brightness efficiency is 14.6 cd / A, the maximum power is 4.23 lm / W at 10.7 V, and the brightness is 698 cd / m2.