Preparation and properties of ruthenium (II) complexes of 2,2′:6′,2″-terpyridines substituted at the 4′-position with heterocyclic groups
| Autor: | J.-P. Petit, G. Houppy, Marc Beley, J. Husson, D. Delabouglise |
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| Přispěvatelé: | Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Absorption spectroscopy
Ruthenium complexes Substituent chemistry.chemical_element Photocathode 010402 general chemistry Electrochemistry Photochemistry 01 natural sciences Inorganic Chemistry Metal chemistry.chemical_compound Electrodeposition Materials Chemistry Physical and Theoretical Chemistry Homoleptic 010405 organic chemistry Modified terpyridines [CHIM.MATE]Chemical Sciences/Material chemistry 0104 chemical sciences Ruthenium Crystallography chemistry visual_art visual_art.visual_art_medium Terpyridine Absorption (chemistry) |
| Zdroj: | Inorganica Chimica Acta Inorganica Chimica Acta, Elsevier, 2005, 358 (11), pp. 3075-3083. ⟨10.1016/j.ica.2005.04.012⟩ |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2005.04.012⟩ |
| Popis: | International audience; Four ligands whose general formula is R-terpy with terpy = 2,2′:6′,2″ terpyridine bearing at the 4′-position a substituent R = 2-furyl, 2-pyrrolyl, 2-thienyl and 5-2,2′bithienyl were synthesised. The absorption spectra and the electrochemical behaviour of the corresponding homoleptic Ru(II) complexes were investigated and compared to those of the parent complex [Ru(terpy)]2+. Due to the donor effect of the grafted heterocyclic groups, the absorption and emission maxima are red-shifted and the energy levels of the HOMO Π(t2g) metal orbitals are slightly higher. The incorporation of these heterocyclic moieties extends the electronic delocalisation over the corresponding ligands, leading to higher emission quantum yields. Cyclic voltammetric studies of pyrrolyl-, thienyl- and bithienyl-functionalised complexes show that an electroactive layer can be deposited on the electrode. Preliminary results point out that an electrodeposited film could be used as a photocathode in an aqueous electrolyte. |
| Databáze: | OpenAIRE |
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