Manipulating Excited State Properties of Iridium Phenylpyridine Complexes with “Push–Pull” Substituents
作者:Emigdio E. Turner、Douglas J. Breen、Gilbert Kosgei、Laura A. Crandall、Gregory M. Curtin、Elena Jakubikova、Ryan M. O’Donnell、Christopher J. Ziegler、Jeffrey J. Rack
DOI:10.1021/acs.inorgchem.2c02269
日期:2022.11.28
prepared a series of complexes of the type [IrIII(ppy)2(L]n+ complexes (1–4), where ppy is a substituted 2-phenylpyridine and L is a chelating phosphine thioether ligand. The parent complex (1) comprises an unsubstituted phenylpyridine ligand, whereas complex 2 contains a nitro substituent on the pyridine ring, complex 3 features a diphenylamine group on the phenyl ring, and 4 has both nitro and diphenylamine
我们制备了一系列 [Ir III (ppy) 2 (L] n +配合物 ( 1–4 ) 类型的配合物,其中 ppy 是取代的 2-苯基吡啶,L 是螯合膦硫醚配体。母体配合物 ( 1 ) 包含未取代的苯基吡啶配体,而络合物2在吡啶环上含有硝基取代基,络合物3在苯环上具有二苯胺基团,而4具有硝基和二苯胺基团。结晶学,1H NMR和元素分析数据与各化学式一致。DFT(密度泛函理论)计算结果显示了一个复杂的电子结构,其中有 Ir、ppy 和 PS 配体的贡献。超快泵浦-探针数据显示了苯基吡啶部分的强大贡献以及强大的全色激发态吸收跃迁。数据表明,硝基和/或二苯胺取代基主导了这一系列化合物的光谱。