title: p-Carborane: a new cage spacer for photoactive metal polypyridine dyads.
abstract: The first example of a binuclear ruthenium complex involving the p-carborane framework in the bridging ligand is reported. The bridging ligand is a symmetric linear array comprising a central p-carborane unit, two p-phenylene spacers, and two 5-yl-2,2'-bipyridine coordinating units. A homobinuclear Ru(II) complex, with 2,2'-bipyridine as peripheral ligands, was synthesized and characterized. The Ru(II)-Ru(III) mixed-valence species, obtained by partial oxidation, has been investigated with steady-state and time-resolved techniques in CH3CN. The rate of photoinduced electron transfer is 2.3 x 10(8) s(-1).
authors.affiliation: Dipartimento di Chimica, Università di Ferrara, INSTM Sezione di Ferrara, and ISOF-CNR Sezione di Ferrara, 44100 Ferrara, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Ghirotti
authors.forename: Peter F H
authors.initials: PF
authors.lastname: Schwab
authors.forename: M Teresa
authors.initials: MT
authors.lastname: Indelli
authors.forename: Claudio
authors.initials: C
authors.lastname: Chiorboli
authors.forename: Franco
authors.initials: F
authors.lastname: Scandola