Aryl 5-substitution of a phenyl-pyridine based ligand as a viable way to influence the opto-electronic properties of bis-cyclometalated Ir(III) heteroleptic complexes

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Abstract

This manuscript reports on the synthesis, the photophysical study and the electroluminescent properties of a series of heteroleptic cyclometalated iridium(III) complexes based on 2,5-diaryl-pyridines as C^N cyclometalating ligands and acetylacetonate as ancillary ligand. The complexes were characterised by elemental analysis, ESI-MS, multinuclear NMR, TGA and electrochemistry. Their optical properties were investigated by UV-Vis and photoluminescence. DFT and TD-DFT calculations provided further insights into the effects of the 5-aryl substitution on the electronic and photophysical properties of the new complexes. The presence of suitable π-extended ligands exerts a beneficial effect on the performances of the corresponding solution-processed light-emitting diodes, leading to a maximum brightness of 10 620 cd m−2 at a current efficiency of 10.0 cd A−1.

Autore Pugliese

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  • Roberto Grisorio , Gian Paolo Suranna , Mastrorilli P , Marco Mazzeo , Silvia Colella , Sonia Carallo , Giuseppe Gigli

Titolo volume/Rivista

DALTON TRANSACTIONS

Anno di pubblicazione

2013

ISSN

1477-9226

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Non Disponibile

Numero di citazioni Scopus

7

Ultimo Aggiornamento Citazioni

2017-04-23 03:20:56

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile