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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 (Articolo in rivista)

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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 (Articolo in rivista) (literal)

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Grisorio R. [ 1 ] ; Suranna G. P. [ 1 ] ; Mastrorilli P. [ 1,2 ] ; Mazzeo M. [ 3,4 ] ; Colella S. [ 4 ] ; Carallo S. [ 4 ] ; Gigli G. [ 3,4,5 ] (2013)
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
in Dalton transactions (2003. Print); ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE,, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND (Regno Unito)
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Grisorio R. [ 1 ] ; Suranna G. P. [ 1 ] ; Mastrorilli P. [ 1,2 ] ; Mazzeo M. [ 3,4 ] ; Colella S. [ 4 ] ; Carallo S. [ 4 ] ; Gigli G. [ 3,4,5 ] (literal)

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[ 1 ] DICATECh Dipartimento Ingn Civile Ambientale Terr, I-70125 Bari, Italy [ 2 ] ICCOM, Ist Chim Composti Organometall, I-70125 Bari, Italy [ 3 ] Univ Salento, Dept Math & Phys E De Giorgi, I-73100 Lecce, Italy [ 4 ] NNL Distretto Tecnol Lecce, CNR Ist Nanosci, I-73100 Lecce, Italy [ 5 ] Fdn Ist Italiano Tecnol IIT, CBN, I-73010 Arnesano, Italy (literal)

Titolo

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 (literal)

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 (CN)-N-boolean AND 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 pi-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). (literal)

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