Impact of Benzannulation Site at the Diimine (N^N) Ligand on the Excited-State Properties and Reverse Saturable Absorption of Biscyclometalated Iridium(III) Complexes
作者:Bingqing Liu、Levi Lystrom、Samuel L. Brown、Erik K. Hobbie、Svetlana Kilina、Wenfang Sun
DOI:10.1021/acs.inorgchem.8b03162
日期:2019.5.6
the quinoline ring on the N^N ligand caused red-shifted charge-transfer absorption band and emission band for complexes Ir2, Ir8, Ir10 vs Ir1 and Ir3 vs Ir2, while benzannulation at the 4,5-/4′,5′-position of 2,2′-bipyridine ligand or at the 7,8-position of the quinoline ring on the N^N ligand induced a blue shift of the charge-transfer absorption and emission bands for complex Ir9 vs Ir1 and Ir4 vs Ir2
合成并研究了十个双环金属化的单阳离子Ir(III)络合物,以阐明二亚胺配体(N ^ N = 2,2'-联吡啶在Ir1中的2- π ,吡啶-2-基)喹啉的π偶联扩展作用。IR2,2-(吡啶-2-基)[6,7]苯并在Ir3的,2-(吡啶-2-基) - [7,8]苯并喹啉在IR4,菲咯啉在IR5,苯并[ ˚F ] [1, 10]菲咯啉在IR6,萘并[2,3- ˚F ] [1,10]菲咯啉在IR7,2,2'-双喹啉在IR8,3,3'- biisoquinoline在IR9,和1,1'- biisoquinoline在IR10)在2,2'-联吡啶上的苯环化对这些配合物的激发态性质和反向饱和吸收(RSA)。根据2,2'-联吡啶配体上的苯并环化位点,观察到电荷转移吸收带和发射光谱的红移或蓝移。在2,2'-联吡啶配体的3,4- / 3',4'-位或5,6- / 5',6'-位或苯并环上喹啉环的6,7-位进行苯环环化N