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Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2003

Long‐Lived MLCT Excited States‐Ru II Complexes with a Helical Bis‐Phen Ligand

Résumé

The synthesis of a new RuII complex [Ru(L1)(4,7-dpphen)]2+, bearing a tetradentate bis-1,10-phenanthroline ligand L1, is described. X-ray crystal structure analysis shows that the tetradentate ligand L1 coils around the metal and occupies both axial and two of the equatorial positions of the complex. 1H NMR studies clearly indicate that the complex has C2 symmetry in solution. The room temperature luminescence properties of [Ru(L1)(4,7-dpphen)]2+ have been studied, as have those of the related complex [Ru(L2)(4,4′-dmbp)]2+. For both complexes, the luminescence quantum yields and lifetimes are three to ten times higher than those of [Ru(bpy)3]2+. These unusual results are explained by the geometrical constraints imposed by the tetradentate ligands L1 and L2 in their respective complexes, resulting in an effective decoupling between the 3MLCT and 3MC excited states

Dates et versions

hal-03468585 , version 1 (08-12-2021)

Identifiants

Citer

Christine Goze, Jean‐claude Chambron, Valérie Heitz, Didier Pomeranc, Xavier J Salom‐roig, et al.. Long‐Lived MLCT Excited States‐Ru II Complexes with a Helical Bis‐Phen Ligand. European Journal of Inorganic Chemistry, 2003, 2003 (20), pp.3752-3758. ⟨10.1002/ejic.200300161⟩. ⟨hal-03468585⟩
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