کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1309416 | 975208 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of ancillary ligands on the photophysical properties of Ru(II) complexes bearing a highly conjugated diimine ligand: A density functional theory study Effect of ancillary ligands on the photophysical properties of Ru(II) complexes bearing a highly conjugated diimine ligand: A density functional theory study](/preview/png/1309416.png)
Two bis-heteroleptic Ru(II) complexes [Ru(bpy)2(pcip)]2+ (1, bpy = 2,2′-bipyridine, pcip = 2-[4-phenylcarboxy]-1H-imidazol[4,5-f][1,10]phenanthroline) and [Ru(phen)2(pcip)]2+ (2, phen = 1,10-phenanthroline), bearing highly conjugated diimine ligands, were prepared and isolated as their PF6 salts. The bpy-derivative 1 showed better photophysical properties (emission quantum yield, lifetime of the emitting state, and the radiative decay rate constant) than the phen-compound 2. These results followed by theoretical calculations at DFT level established a comprehensive understanding between the structural parameters and the photophysical properties, as well as of the influence of π conjugation and the symmetry of the molecules on spectroscopic characteristics. These results provide fundamental photophysical data for selecting ancillary ligands in the design and improvement of Ru-based light-harvesting complexes.
Emission quantum yield, lifetime of the emitting state and the radiative decay rate constant of 1 are better than 2.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 362, Issue 14, 10 November 2009, Pages 5064–5072