Synthesis, photophysical, and electrochemical properties of two novel trinuclear Ru(II) polypyridyl complexes
摘要:
Two polypyridyl ligands 2,2',2"-tris((4,5-diazafluoren-9-yliminoxy)ethyl)amine (L-1) and 1,3,5-tris((4,5-diazafluoren-9-yliminoxy)methyl))-2,4,6-trimethylbenzene (L-2), and corresponding trinuclear Ru(II) complexes [(bpy)(6)L1-2(Ru-II)(3)](PF6)(6) (Ru-L-1, Ru-L-2) have been synthesized. Cyclic voltammetry of the complexes are consistent with one Ru(II)-centered oxidation at 1.32 V and four ligand-centered reductions. Photophysical behaviors are investigated by UV-Vis absorption and fluorescence spectrometry. The two complexes show metal-to-ligand charge transfer absorption at 440 nm and emission at around 580 nm. (C) 2007 Elsevier B.V. All rights reserved.