Synthesis and luminescence properties of cyclometalated iridium(III) complexes incorporating conjugated benzotriazole units

Langdon-Jones, Emily E., Ward, Benjamin ORCID: https://orcid.org/0000-0003-1406-5940 and Pope, Simon ORCID: https://orcid.org/0000-0001-9110-9711 2018. Synthesis and luminescence properties of cyclometalated iridium(III) complexes incorporating conjugated benzotriazole units. Journal of Organometallic Chemistry 861 , pp. 234-243. 10.1016/j.jorganchem.2018.02.019

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Abstract

The stepwise synthesis of imidazo[4,5-f]-1,10-phenanthroline-based ligands that incorporate conjugated benzotriazole units are described. Corresponding cyclometalated Ir(III) complexes of the type [Ir(CˆN)2(L)]BF4 (where CˆN = cyclometalating ligand; L = phenanthroline type ligand) are reported. The complexes were characterized using a variety of techniques, including IR, NMR, UV-vis. spectroscopies, mass spectrometry and cyclic voltammetry. The [Ir(ppy)2(L)]BF4 complexes display luminescence in the visible region with the benzotriazole variants showing blue shifted emission around 495 nm. Supporting TD-DFT calculations predict that a mixture of MLCT and LLCT character may contribute to the HOMO-LUMO transition of the benzotriazole derivatives.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	Elsevier
ISSN:	0022-328X
Date of First Compliant Deposit:	21 March 2018
Date of Acceptance:	13 February 2018
Last Modified:	04 Dec 2024 07:15
URI:	https://orca.cardiff.ac.uk/id/eprint/110081

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