6a−6g) is reported. These ligands were reacted with the dimer [(ppy)2IrCl]2 (ppyH = 2-phenylpyridine) and afforded, after subsequent counterion exchange, a new series of luminescent cationic heteroleptic iridium(III) complexes, [(ppy)2Ir(bpy*)]PF6 (8a−8g). These complexes were characterized by electrochemical and spectroscopic methods. The crystal structures of two of these complexes (8a and 8g) are reported
据报道,合成了一个4'-官能化的5,5'-二芳基-
2,2'-联吡啶(bpy *;6a - 6g)家族。这些
配体与二聚体[(ppy)2 IrCl] 2(ppyH =
2-苯基吡啶)反应,并在随后的抗衡离子交换后提供了一系列新的发光阳离子杂原子
铱(III)配合物,[(ppy)2 Ir( bpy *)] PF 6(8a - 8g)。这些配合物通过电
化学和光谱法表征。报道了其中两个复合物(8a和8g)的晶体结构。除8c和8f外的所有复合物在77 K和室温下,在2-MeTHF和ACN中均表现出强烈且长寿命的发射。通过计算模型将这种发射的起源指定为
配体到
配体电荷转移的混合物[ 3 LLCT; π(ppy)→π*(bpy *)]和
金属到
配体的电荷转移[ 3 MLCT; dπ(Ir)→π*(bpy *)]激发态,主要由前者组成。8a - 8c的发光性质取决于固定在二
亚胺配体上的芳基取代基在4'位置的官能化,而8d