title: Efficient photoinduced energy transfer mediated by aromatic homoconjugated bridges.
abstract: A new donor-bridge-acceptor (D-B-A) dyad consisting of ruthenium(II) and iridium(III) species separated by an homoconjugated bridge derived from 7,7-diphenylnorbornane [Ir-Nor-Ru](3+) has been synthesised. The photophysical and electrochemical properties of the heterodinuclear complex have been compared with those of the analogous homodinuclear complexes [Ru-Nor-Ru](4+) and [Ir-Nor- Ir](2+) . Transient absorption spectra on the nanosecond and sub-picosecond timescales show, for the first time, that an homoconjugated bridge can mediate efficiently in the photoinduced energy transfer from the iridium(III) to the ruthenium(II) centres according to a Dexter-type mechanism.
authors.affiliation: Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain. josio@quim.ucm.es
authors.forename: José
authors.initials: J
authors.lastname: Osío Barcina
authors.forename: Noelia
authors.initials: N
authors.lastname: Herrero-García
authors.forename: Fabio
authors.initials: F
authors.lastname: Cucinotta
authors.forename: Luisa
authors.initials: L
authors.lastname: De Cola
authors.forename: Pablo
authors.initials: P
authors.lastname: Contreras-Carballada
authors.forename: Rene M
authors.initials: RM
authors.lastname: Williams
authors.forename: Andrés
authors.initials: A
authors.lastname: Guerrero-Martínez