title: Luminescent Mononuclear and Dinuclear Iridium(III) Cyclometalated Complexes Immobilized in a Polymeric Matrix as Solid-State Oxygen Sensors.
abstract: Oxygen quenching of the luminescence of mononuclear and dinuclear Ir(III) cyclometalated complexes immobilized in the pPEGMA matrixes has been studied. Linear Stern-Volmer plots, even when experiments at different emission wavelengths have been performed, were evidenced. Despite the different luminescence lifetimes of the chromophores in the absence of quencher, similar Stern-Volmer slopes have been calculated. This behavior was tentatively interpreted by taking into account the size and charge of the chromophores. Increased sizes and lower charges seem to enhance the sensitivity of the systems. Such findings could be of interest for the design of new solid-state luminescent oxygen sensors with improved performance.
authors.affiliation: Istituto di Tecniche Spettroscopiche (ITS) del CNR, via Sperone 31, 98166 Messina, Istituto Chimico, Facoltà di Ingegneria, Università di Catania, 95125 Catania, and Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, via Sperone 31, 98166 Messina, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Di Marco
authors.forename: M
authors.initials: M
authors.lastname: Lanza
authors.forename: A
authors.initials: A
authors.lastname: Mamo
authors.forename: I
authors.initials: I
authors.lastname: Stefio
authors.forename: C
authors.initials: C
authors.lastname: Di Pietro
authors.forename: G
authors.initials: G
authors.lastname: Romeo
authors.forename: S
authors.initials: S
authors.lastname: Campagna