Highly soluble fluorine containing Cu(I) AlkylPyrPhos TADF complexes

Jasmin M. Busch; Daniel M. Zink; Patrick Di Martino-Fumo; Florian R. Rehak; Pit Boden; Sophie Steiger; Olaf Fuhr; Martin Nieger; Wim Klopper; Markus Gerhards; Stefan Bräse

doi:10.1039/C9DT02447F

Highly soluble fluorine containing Cu(i) AlkylPyrPhos TADF complexes†

Jasmin M. Busch,

^a Daniel M. Zink,

^a Patrick Di Martino-Fumo,^b Florian R. Rehak,^c Pit Boden,^b Sophie Steiger,^b Olaf Fuhr,

^d Martin Nieger,

^e Wim Klopper,

*^c Markus Gerhards

*^b and Stefan Bräse

*^af

Author affiliations

* Corresponding authors

^a Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Karlsruhe, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
E-mail: braese@kit.edu

^b Chemistry Department, TU Kaiserslautern and Research Center Optimas, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany
E-mail: gerhards@chemie.uni-kl.de

^c Institute of Physical Chemistry – Theoretical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
E-mail: klopper@kit.edu

^d Karlsruhe Institute of Nanotechnology (INT) and Karlsruhe Nano-Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
E-mail: olaf.fuhr@kit.edu

^e Department of Chemistry, University of Helsinki, P.O. Box 55 (A.I. Virtasen aukio 1), 00014 Helsinki, Finland
E-mail: martin.nieger@helsinki.fi

^f Institute of Toxicology and Genetics (ITG), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

Abstract

Luminescent Cu(I) AlkylPyrPhos complexes with a butterfly-shaped Cu₂I₂ core and halogen containing ancillary ligands, with a special focus on fluorine, have been investigated in this study. These complexes show extremely high solubilities and a remarkable (photo)chemical stability in a series of solvents. A tunable emission resulting from thermally activated delayed fluorescence with high quantum yields was determined by luminescence and lifetime investigations in solvents and solids. Structures of the electronic ground states were analyzed by single crystal X-ray analysis. The structure of the lowest excited triplet state was determined by transient FTIR spectroscopy, in combination with quantum chemical calculations. With the obtained range of compounds we address the key requirement for the production of organic light emitting diodes based on solution processing.

This article is part of the themed collection: Modern coordination chemistry

Dalton Transactions

Highly soluble fluorine containing Cu(i) AlkylPyrPhos TADF complexes†

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Highly soluble fluorine containing Cu(I) AlkylPyrPhos TADF complexes

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