title: On an electrode modified by a supramolecular ruthenium mixed valence (Ru(II)/Ru(III)) diphosphine-porphyrin assembly.
abstract: Three novel polymetallic ruthenium (III) meso-tetra(4-pyridyl)porphyrins containing peripheral "RuCl(3)(dppb)" moieties have been prepared and characterized. The X-ray structure of the tetraruthenated {NiTPyP[RuCl(3)(dppb)](4)} porphyrin complex crystallizes in the triclinic space group P1. This structure is discussed and compared with the crystal data for the mer-[RuCl(3)(dppb)(py)]. The {TPyP[RuCl(3)(dppb)](4)} and {CoTPyP[RuCl(3)(dppb)](4)} porphyrins were used to obtain electrogenerated films on ITO and glass carbon electrode surfaces, respectively. Such tetraruthenated porphyrins form films of a mixed-valence species {TPyP[Ru(dppb)](4)(muCl(3))(2)}(2n)(4n2+) and {CoTPyP[Ru(dppb)](4)(muCl(3))(2)}(2n)(4n2+) on the electrode surface. The modified electrode with {CoTPyP[RuCl(3)(dppb)](4)} is very stable and can be used to detect organic substrates such as catechol.
authors.affiliation: Fundação Educacional de Barretos, CEP 14783-226, Barretos (SP), Brazil.
authors.forename: Luis R
authors.initials: LR
authors.lastname: Dinelli
authors.forename: Gustavo
authors.initials: G
authors.lastname: Von Poelhsitz
authors.forename: Eduardo E
authors.initials: EE
authors.lastname: Castellano
authors.forename: Javier
authors.initials: J
authors.lastname: Ellena
authors.forename: Sérgio E
authors.initials: SE
authors.lastname: Galembeck
authors.forename: Alzir A
authors.initials: AA
authors.lastname: Batista
mesh_terms: D018360:Crystallography, X-Ray; D004566:Electrodes; D046911:Macromolecular Substances / Q000138:chemical synthesis / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D011166:Porphyrins / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D009942:Organometallic Compounds; D010720:Phosphines; D011166:Porphyrins; D012428:Ruthenium