Bis(arylimidazole) Iridium Picolinate Emitters and Preferential Dipole Orientation in Films

Aron J Huckaba; Alessia Senes; Sadig Aghazada; Azin Babaei; Stefan C J Meskers; Iwan Zimmermann; Pascal Schouwink; Natalia Gasilova; René A J Janssen; Henk J Bolink; Mohammad Khaja Nazeeruddin

doi:10.1021/acsomega.8b00137

Bis(arylimidazole) Iridium Picolinate Emitters and Preferential Dipole Orientation in Films

ACS Omega. 2018 Mar 31;3(3):2673-2682. doi: 10.1021/acsomega.8b00137. Epub 2018 Mar 6.

Affiliations

¹ Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, and Institute of Chemical Sciences and Engineering, Ecole Polytechnique Federale de Lausanne Valais Wallis, Rue de l'Indutrie 17, 1950 Sion, Valais, Switzerland.
² Holst Centre/TNO, High Tech Campus 31, P.O. Box 8550, 5605 KN Eindhoven, The Netherlands.
³ Molecular Materials and Nanosystems and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
⁴ Instituto de Ciencia Molecular, Universidad de Valencia, c/Catedrático J. Beltrán 2, 46980 Paterna, Spain.

Abstract

The straightforward synthesis and photophysical properties of a new series of heteroleptic iridium(III) bis(2-arylimidazole) picolinate complexes are reported. Each complex has been characterized by nuclear magnetic resonance, UV-vis, cyclic voltammetry, and photoluminescent angle dependency, and the emissive properties of each are described. The preferred orientation of transition dipoles in emitter/host thin films indicated more preferred orientation than homoleptic complex Ir(ppy)₃.