are used as dopant emitters in solution processed organic light-emitting diodes. These emitters bear one sterically hindered 2,4-decanedionate and two phenylpyridine (ppy) ligands functionalized with electron withdrawing benzylsulfonyl groups and fluorine atoms. The steric and electronic effects of such substituents on the photophysical properties and performance of devices of 1 and 2 are investigated
橙色和绿色
磷光杂原子
铱络合物1和2 [(1):
铱(III)双[2-(5'-苄基磺酰基)苯基
吡啶基-N,C2'](2,4-
癸烷二酸酯)和(2):
铱(III)双[2-(5'-苄基磺酰基-3',6'-二
氟)苯基
吡啶基-N,C2'](2,4-
十二烷二酸酯)]用作溶液处理的有机发光二极管中的掺杂剂发射极。这些发射体带有一个空间受阻的2,4-
癸二酸酯和两个带有吸电子苄基磺酰基和
氟原子官能化的苯基
吡啶(ppy)
配体。这样的取代基对光物理特性和器件的性能的空间和电子效应1和2是通过与绿色发光荧光体参考的Ir(ppy)比较研究2(A
CAC)
铱(III)双(
2-苯基吡啶N,C2')-
乙酰丙酮]。特别是,用苄基磺酰基对ppy
配体进行官能化可提高光致发光的量子产率(Φ),红色使配合物1的发射相对于Ir(ppy)2(a
CAC)移动。在两个
氟原子的相同
配体的进一步取代2个还原的参照复合物的绿光发射,增加其Φ。因此,两