A complete set of the symmetrical bidiazine (bdz) and asymmetrical pyridyldiazine (pydz) ligands, along with the known 2,2′‐bipyridyl (bpy) ligand, and their respective rhenium(I)‐tricarbonyl‐bromo and ‐thiocyonato complexes are presented. A bathochromic shift is observed with an increasing number of nitrogen atoms, caused by a stabilization of the diimine based LUMO. As expected from the energy gap
提供了一套完整的对称双二嗪 (bdz) 和不对称
吡啶基二嗪 (pydz)
配体,以及已知的
2,2'-联吡啶 (bpy)
配体,以及它们各自的
铼 (I)-三羰基-
溴和-
硫氰化配合物. 由于基于二
亚胺的 LUMO 的稳定性,随着氮原子数量的增加,观察到红移。正如能隙定律所预期的那样,这导致沿 bpy-pydz-bdz 线的非辐射衰减常数 (knr) 增加。有趣的是,与其他 pydz
配体(2-(
吡啶-2-基)
哒嗪(pypdz)和 3,3'-联
哒嗪(bpdz))相比,两种
哒嗪配体的 knr 增加并不明显。bdz
配体。这导致整体寿命和量子产率更长,