title: Synthesis and characterisation of ruthenium complexes containing a pendent catechol ring.
abstract: A series of [Ru(bipy)2L]+ and [Ru(phen)2L]+ complexes where L is 2-[5-(3,4-dimethoxyphenyl)-4H-1,2,4-triazol-3-yl]pyridine (HL1) and 4-(5-pyridin-2-yl-4H-1,2,4-triazol-3-yl)benzene-1,2-diol (HL2) are reported. The compounds obtained have been characterised using X-ray crystallography, NMR, UV/Vis and emission spectroscopies. Partial deuteriation is used to determine the nature of the emitting state and to simplify the NMR spectra. The acid-base properties of the compounds are also investigated. The electronic structures of [Ru(bipy)2L1]+ and Ru(bipy)2HL1]2+ are examined using ZINDO. Electro and spectroelectrochemical studies on [Ru(bipy)2(L2)]+ suggest that proton transfer between the catechol and triazole moieties on L2 takes place upon oxidation of the L2 ligand.
authors.affiliation: National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland.
authors.forename: Luke
authors.initials: L
authors.lastname: O'Brien
authors.forename: Marco
authors.initials: M
authors.lastname: Duati
authors.forename: Sven
authors.initials: S
authors.lastname: Rau
authors.forename: Adrian L
authors.initials: AL
authors.lastname: Guckian
authors.forename: Tia E
authors.initials: TE
authors.lastname: Keyes
authors.forename: Noel M
authors.initials: NM
authors.lastname: O'Boyle
authors.forename: Andreas
authors.initials: A
authors.lastname: Serr
authors.forename: Helmar
authors.initials: H
authors.lastname: Görls
authors.forename: Johannes G
authors.initials: JG
authors.lastname: Vos
mesh_terms: D002396:Catechols / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D002396:Catechols; D008024:Ligands; D009942:Organometallic Compounds; D012428:Ruthenium