کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1310308 | 975240 | 2005 | 9 صفحه PDF | دانلود رایگان |
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.
Ruthenium (II) complexes, with terpyridine ligands functionalised at 4′ position with heterocycles (furanne, pyrrole, thiophene, bithiophene), have been prepared and characterised. Electrodes were coated with electroactive layers prepared from these complexes.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 358, Issue 11, 1 July 2005, Pages 3075–3083