title: Orotate containing anionic luminescent iridium(III) complexes and their use in soft salts.
abstract: Two anionic iridium complexes [(R-ppy)2Ir(O^N)]TBA with R-ppy = 2-phenylpyridine or 4,5'-dimethyl-2-phenylpyridine, O^N = dianionic form of orotic acid and TBA = tetrabutylammonium have been synthesised and fully characterised by UV-Vis, emission, IR, NMR and cyclic voltammetric studies. These cyclometallated luminescent complexes containing a dianionic bidentate ancillary ligand show bright emission (60-70% PLQY) with maxima in the green region of the visible spectrum. Coupled with the ionic iridium complexes [(ppy)2Ir(N^N)]X, where N^N = 2-picolylamine or 2,2'-bipyridyl, and X = Cl(-) or CH3CO2(-), a series of new soft salts of general formula [(ppy)2Ir(N^N)][(R-ppy)2Ir (O^N)] have been obtained and fully characterized, with enhanced luminescent properties up to ca. 80% of phosphorescence quantum yields.
authors.affiliation: LASCAMM CR-INSTM Unità della Calabria, Dipartimento di Chimica e Tecnologie Chimiche - CTC, Università della Calabria, Via P. Bucci Cubo 14C, Arcavacata (CS) - 87036, Italy. nicolas.godbert@unical.it.
authors.forename: Andreea
authors.initials: A
authors.lastname: Ionescu
authors.forename: Elisabeta Ildyko
authors.initials: EI
authors.lastname: Szerb
authors.forename: Yogesh Jivajirao
authors.initials: YJ
authors.lastname: Yadav
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Talarico
authors.forename: Mauro
authors.initials: M
authors.lastname: Ghedini
authors.forename: Nicolas
authors.initials: N
authors.lastname: Godbert