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Preparation, photophysical, and electrochemical properties of three trinuclear Ru(II) complexes: Bridging ligands composed of 2,2′-bipyridine and 4,5-diazafluorene fragments.
- Source :
-
Inorganic Chemistry Communications . May2014, Vol. 43, p10-14. 5p. - Publication Year :
- 2014
-
Abstract
- Abstract: Three bridging ligands 5,5′-bis[(4,5-diazafluoren-9-ylimino)methyl]-2,2′-bipyridine (L1), 5,5′-bis[2-(4,5-diazafluoren-9-ylimino)phenoxymethyl]-2,2′-bipyridine (L2), 5,5′-bis[4-(4,5-diazafluoren-9-ylimino)phenoxymethyl]-2,2′-bipyridine (L3), and corresponding Ru(II) complexes [(bpy)6Ru3(L1–3)](PF6)6 (bpy=2,2′-bipyridine) have been synthesized. The three ligands have two kinds of nonequivalent chelating sites: one involving the 2,2′-bipyridine moiety, and the other involving the 4,5-diazafluorene moiety. The emission intensities of complexes [(bpy)6Ru3(L2)]6+ and [(bpy)6Ru3(L3)]6+ are almost equal to that of complex [(bpy)6Ru3(L1)]6+ in CH3CN solution at room temperature, but weaker than that of complex [(bpy)6Ru3(L1)]6+ in EtOH–MeOH (4:1, v/v) glassy matrix at 77K. Cyclic voltammetry and differential pulse voltammetry studies of the three complexes show one Ru(II)-centered oxidation at around 1.33V for the RuII/III couple. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13877003
- Volume :
- 43
- Database :
- Academic Search Index
- Journal :
- Inorganic Chemistry Communications
- Publication Type :
- Academic Journal
- Accession number :
- 95227635
- Full Text :
- https://doi.org/10.1016/j.inoche.2014.01.013