title: Photoinduced Charge Separation on the Microsecond Timescale in Graphene Oxide and Reduced Graphene Oxide Suspensions.
abstract: Transient absorption spectroscopy of graphene oxide (GO) and reduced graphene oxide (rGO) suspensions provides evidence for the photochemical generation of a charge-separated state on the microsecond timescale upon laser excitation. The lifetime and quantum yield of charge separation in suspended rGO were found to be higher than for GO. This could be advantageous for optoelectronic and photocatalytic applications, where graphene-based materials act as charge (electron) carriers. The electron-transfer quenching of the rGO charge-separated state by different amines is more efficient when the amine is a better electron donor and more easily oxidized.
authors.affiliation: Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain.
authors.forename: Herme G
authors.initials: HG
authors.lastname: Baldoví
authors.affiliation: Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain.
authors.forename: Mercedes
authors.initials: M
authors.lastname: Álvaro
authors.affiliation: Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022, Valencia, Spain. bferrer@qim.upv.es.
authors.forename: Belén
authors.initials: B
authors.lastname: Ferrer
authors.affiliation: Instituto Universitario de Tecnologia Química, CSIC-UPV, Avd. de los Naranjos, 46022, Valencia, Spain. hgarcia@qim.upv.es.
authors.forename: Hermenegildo
authors.identifier: http://orcid.org/0000-0002-9664-493X
authors.initials: H
authors.lastname: García
keywords: charge separation; graphene; photochemistry; reduced graphene oxide; time-resolved spectroscopy