Cationic, luminescent cyclometalated iridium(iii) complexes based on substituted 2-phenylthiazole ligands

Stokes, Emily C., Langdon-Jones, Emily, Groves, Lara M., Platts, James Alexis ORCID: https://orcid.org/0000-0002-1008-6595, Horton, Peter N., Fallis, Ian A. ORCID: https://orcid.org/0000-0001-7361-0182, Coles, Simon J. and Pope, Simon J. A. ORCID: https://orcid.org/0000-0001-9110-9711 2015. Cationic, luminescent cyclometalated iridium(iii) complexes based on substituted 2-phenylthiazole ligands. Dalton Transactions 44 (18) , pp. 8488-8496. 10.1039/C4DT03054K

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Abstract

Ten cationic heteroleptic iridium(III) complexes, [Ir(emptz)2(N^N)](PF6) were prepared from a cyclometalated iridium bridged-chloride dimer involving two ethyl-4-methylphenylthiazole-5-carboxylate (emptz) ligands. One X-ray crystallographic study was undertaken where the ancillary N^N ligand was 4,7-diphenyl-1,10-phenanthroline and revealed the anticipated structure, showing a distorted octahedral coordination geometry at Ir(III). The complexes were visibly luminescent with modestly structured emission at 540–590 nm and lifetimes (60–340 ns) consistent with phosphorescence. TD-DFT calculations suggest that strong MLCT character contributes to the visible absorption characteristics, whilst the moderately structured emission profiles indicate a 3MLCT/3IL admixture of states to the phosphorescence.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Chemistry
Subjects:	Q Science > QD Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	1477-9226
Last Modified:	14 Nov 2022 08:29
URI:	https://orca.cardiff.ac.uk/id/eprint/68338

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