A family of cyclometalated [Ir(III)] complexes containing two F2ppy ligands and a bis-oxazoline (box) ancillary ligand, either chiral (1) or achiral (2) has been synthesized. They exhibit photophysical and electrochemical properties quite similar to the isoelectronic and well known [Ir(F2ppy)2(acac)] complex. However, an unprecedented photoreactivity has been observed. Upon UV irradiation of air-equilibrated solutions of both complexes, stable photoproducts containing an [Ir(IV)] metal center are obtained. The photoproducts exhibit highly efficient blue luminescence with good OLED performances. The same [Ir(IV)] complexes are obtained also by electrochemical oxidation.

Blue and highly emitting [Ir(IV)] complexes by an efficient photoreaction of yellow luminescent [Ir(III)] complexes

MARCHI, ENRICO;LOCRITANI, MIRKO;BARONCINI, MASSIMO;BERGAMINI, GIACOMO;SINISI, RICCARDO;MONARI, MAGDA;BANDINI, MARCO;CERONI, PAOLA;BALZANI, VINCENZO
2014

Abstract

A family of cyclometalated [Ir(III)] complexes containing two F2ppy ligands and a bis-oxazoline (box) ancillary ligand, either chiral (1) or achiral (2) has been synthesized. They exhibit photophysical and electrochemical properties quite similar to the isoelectronic and well known [Ir(F2ppy)2(acac)] complex. However, an unprecedented photoreactivity has been observed. Upon UV irradiation of air-equilibrated solutions of both complexes, stable photoproducts containing an [Ir(IV)] metal center are obtained. The photoproducts exhibit highly efficient blue luminescence with good OLED performances. The same [Ir(IV)] complexes are obtained also by electrochemical oxidation.
E. Marchi; M. Locritani; M. Baroncini; G. Bergamini; R. Sinisi; M. Monari; C. Botta; W. Mróz; M. Bandini; P. Ceroni; V. Balzani
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/376662
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