Synthesis and pH-sensitive luminescence of bis-terpyridyl iridium(III) complexes incorporating pendent pyridyl groups
作者:Kathryn J. Arm、Wendy Leslie、J.A. Gareth Williams
DOI:10.1016/j.ica.2005.09.021
日期:2006.3
of iridium(III) bis-terpyridine complexes have been prepared which incorporate pendent pyridyl groups at the 4′-positions of one or both of the terpyridine (tpy) ligands. These include: three mutually isomeric homoleptic complexes, in which the nitrogen atom of the pendent pyridyl is para , meta or ortho to the C–C bond to the terpyridine; their heteroleptic analogues in which the second ligand is
摘要制备了一系列铱(III)双-吡啶吡啶配合物,它们在一个或两个叔吡啶(tpy)配体的4'-位掺入侧基吡啶基。这些包括:三个相互异构的同型络合物,其中吡啶基侧基的氮原子与对吡啶的C-C键成对,间或邻。它们的杂配类似物,其中第二个配体是4′-甲苯基-吡啶(ttpy);新配体4'-(2,6-二甲基吡啶-4-基)-吡啶的类似物配合物;以及在叔吡啶和侧基吡啶基之间插入一个附加苯环的相关配合物。在室温下,所有络合物在空气平衡的水溶液中均发光。均配物络合物显示出类似于未取代的[Ir(tpy)2] 3+的结构发射,在这些条件下的发光寿命约为1μs。与[Ir(ttpy)2] 3+相似,杂合类似物提供更宽泛的红移发射光谱,表明这些络合物中的发射主要来自与4'-甲苯基-叔吡啶相关的低能激发态配体。掺入额外苯环的配合物的进一步红移表明,在这些情况下,发射态涉及结合度更高的苯基吡啶基附加的配体。除间位取代的体系外