title: A heptanuclear light-harvesting metal-based antenna dendrimer with six Ru(ii)-based chromophores directly powering a single Os(ii)-based energy trap.
abstract: The novel dendritic-shaped, heptanuclear compound 1 - the first mixed Os-Ru dendrimer with tris-chelating bridging ligands - has been synthesized and its photophysics studied by fs pump-probe transient spectroscopy. In 1, all light energy absorbed by six identical Ru(ii) chromophores is funnelled to the luminescent central Os(ii) core, with a time constant of 11 ps, by Dexter energy transfer.
authors.affiliation: Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, and Centro di ricerca interuniversitario per la conversione chimica dell'energia solare (SOLAR-CHEM), 98166 Messina, Italy.
authors.forename: Emanuele
authors.initials: E
authors.lastname: La Mazza
authors.affiliation: Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, and Centro di ricerca interuniversitario per la conversione chimica dell'energia solare (SOLAR-CHEM), 98166 Messina, Italy.
authors.forename: Fausto
authors.initials: F
authors.lastname: Puntoriero
authors.affiliation: Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, and Centro di ricerca interuniversitario per la conversione chimica dell'energia solare (SOLAR-CHEM), 98166 Messina, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Nastasi
authors.affiliation: Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
authors.forename: Baptiste
authors.initials: B
authors.lastname: Laramée-Milette
authors.affiliation: Département de Chimie, Université de Montréal, Montréal, Québec H3T 1J4, Canada.
authors.forename: Garry S
authors.initials: GS
authors.lastname: Hanan
authors.affiliation: Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, and Centro di ricerca interuniversitario per la conversione chimica dell'energia solare (SOLAR-CHEM), 98166 Messina, Italy.
authors.forename: Sebastiano
authors.identifier: http://orcid.org/0000-0003-3385-2528
authors.initials: S
authors.lastname: Campagna