characterized. Cyclic voltammetric studies revealed a reversible or quasi-reversible iridium(IV/III) oxidation couple at about +1.13 to +1.32 V and a reversible diimine reduction couple at about −1.10 to −1.29 V versus SCE. Upon photoexcitation, all the complexes displayed intense and long-lived green to orange triplet metal-to-ligand charge-transfer (3MLCT) (dπ(Ir) → π*(dpq or dpqa)) emission in aprotic
一系列发光的环
金属化
铱(III)配合物dipyridoquinoxaline的[Ir(N ∧ C)2(N ∧ N)](PF 6)(HN ∧ C =
1-苯基吡唑,Hppz,N ∧ N =二
吡啶并[3,2- ˚F:2',3'- ħ ]
喹喔啉,DPQ(1A),2-(ñ -butylamido)
吡啶并[3,2- ˚F:2',3'- ħ ]
喹喔啉,DPQA(1B); HN ∧ ç =
7,8-苯并喹啉,Hbzq,N ∧ N = DPQ(图2a),DPQA(图2b); HN ∧ C =
2-苯基喹啉,HPQ,N ∧ N = DPQ(在图3a)中,已经合成并表征了dpqa(3b))。循环伏安研究显示,相对于SCE,
铱(IV / III)的可逆或准可逆的氧化偶合在约+1.13至+1.32 V时可逆,二
亚胺还原偶合在约-1.10至-1.29 V时。在光激发下,所有配合物都显示出强烈且长寿命的绿色到橙色三重