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Redox cycling of iridium(III) complexes gives versatile materials for photonics applications

Morris, C. D. and Spulber, M. and Neuburger, M. and Palivan, C. G. and Constable, E. C. and Housecroft, C. E.. (2016) Redox cycling of iridium(III) complexes gives versatile materials for photonics applications. Polyhedron, 106. pp. 51-57.

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Abstract

The cyclometallated iridium(III) complex [Me4N][Ir(ppy)2(cat)] (Hppy = 2-phenylpyridine; H2cat = benzene-1,2-diol) has been prepared under inert atmosphere and has been structurally characterized by single crystal X-ray diffraction. Under ambient conditions, the fully reduced complex (as formulated) undergoes rapid one-electron oxidation both in solution and in the solid state to a species containing a semiquinone ligand. The resultant neutral complex [Ir(ppy)2(sq)] (sq = o-semiquinone) was also prepared by exposing the reaction mixture to O2 during the course of the reaction. Electron paramagnetic resonance (EPR) spectroscopy confirms the diamagnetic nature of the complex [Me4N][Ir(ppy)2(cat)] and indicates that the unpaired electron in [Ir(ppy)2(sq)] resides primarily on the sq ligand. The photophysical, electrochemical, and spectroelectrochemical properties of [Ir(ppy)2(sq)] were investigated and reveal the changes in absorption as the complex is converted into the catecholate and quinone forms.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Constable)
05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Palivan, Cornelia G and Morris, Collin and Spulber, Mariana
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0277-5387
e-ISSN:1873-3719
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:22 May 2018 09:41
Deposited On:20 Jun 2016 12:27

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