title: Mono- and dinuclear osmium N,N'-di- and tetraphenylbipyridyls and extended bipyridyls. Synthesis, structure and electrochemistry.
abstract: The efficient synthesis of mono- and dinuclear Os(IV) bipyridyl complexes is reported. These compounds show a two-step oxidation process leading to notable structural changes, which are reflected in their emission properties. During the second oxidation process a tetracation with a hydride-dihydrogen structure (instead of a trihydride) is formed. This results in a significant bathochromic shift of the emission band, accompanied by a moderate increase in intensity.
authors.affiliation: Departamento de Quíımica Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain. maester@unizar.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Esteruelas
authors.forename: Israel
authors.initials: I
authors.lastname: Fernández
authors.forename: Mar
authors.initials: M
authors.lastname: Gómez-Gallego
authors.forename: Mamen
authors.initials: M
authors.lastname: Martín-Ortíz
authors.forename: Pedro
authors.initials: P
authors.lastname: Molina
authors.forename: Montserrat
authors.initials: M
authors.lastname: Oliván
authors.forename: Francisco
authors.initials: F
authors.lastname: Otón
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Sierra
authors.forename: Marta
authors.initials: M
authors.lastname: Valencia