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Intramolecular pi-Stacking in a Phenylpyrazole-Based Iridium Complex and Its Use in Light-Emitting Electrochemical Cells

Costa, Ruben D. and Ortí, Enrique and Bolink, Henk and Graber, Stefan and Housecroft, Catherine E. and Constable, Edwin C.. (2010) Intramolecular pi-Stacking in a Phenylpyrazole-Based Iridium Complex and Its Use in Light-Emitting Electrochemical Cells. Journal of the American Chemical Society, 132 (17). pp. 5978-5980.

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Official URL: http://edoc.unibas.ch/dok/A5841499

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Abstract

A novel iridium(III) complex, [Ir(dmppz)2pbpy][PF6] (Hdmppz = 3,5-dimethyl-1-phenylpyrazole and pbpy = 6-phenyl-(2,2′-bipyridine)), is reported. The complex shows an intramolecular face-to-face π-stacking between the phenyl ring of the dmppz ligand and the pendant phenyl of the pbpy ligand. This interaction provides a supramolecular cage formation that holds also in the excited states. Light-emitting electrochemical cells (LECs) using the novel complex show extraordinary lifetimes of ∼2000 h. The high stability is favored by the presence of pendant methyl groups on the dmppz ligands that hinder the entrance of water molecules rendering the degradation of the complex more difficult.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Anorganische Chemie (Housecroft)
UniBasel Contributors:Housecroft, Catherine Elizabeth and Constable, Edwin Charles and Graber, Stefan
Item Type:Article, refereed
Publisher:American Chemical Society
ISSN:0002-7863
e-ISSN:1520-5126
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:10 Apr 2017 14:39
Deposited On:14 Sep 2012 06:53

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