title: Energy transfer from a rhodamine antenna to a ruthenium-bipyridine center.
abstract: The coordination of a modified rhodamine B (Rhod) to a bis-bipyridine ruthenium (ii) (Ru-bpy) phototrigger complex enables a photodissociation reaction at longer wavelengths through enhanced absorption of green light (532 nm). The very high molar absorptivity of rhodamine (∼10(5) M(-1) cm(-1)) and the high quantum efficiency of Förster resonance energy transfer (FRET) from rhodamine to the Ru-bpy center (0.84) result in an unusually high photosensitivity and uncaging cross-section of the Ru-bpy-rhodamine complex at longer wavelengths.
authors.affiliation: Departamento de Química Inorgánica, Analítica y Química Física, INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón 2 Piso 3, C1428EHA, Buenos Aires, Argentina. rober@qi.fcen.uba.ar.
authors.forename: Oscar
authors.initials: O
authors.lastname: Filevich
authors.forename: Beatriz
authors.initials: B
authors.lastname: García-Acosta
authors.forename: Roberto
authors.initials: R
authors.lastname: Etchenique