Remarkable high efficiency of red emitters using Eu(III) ternary complexes

Alena S. Kalyakina; Valentina V. Utochnikova; Manuel Zimmer; Fabian Dietrich; Anna M. Kaczmarek; Rik Van Deun; Andrey A. Vashchenko; Alexander S. Goloveshkin; Martin Nieger; Markus Gerhards; Ute Schepers; Stefan Bräse

doi:10.1039/C8CC02930J

Remarkable high efficiency of red emitters using Eu(iii) ternary complexes†

Alena S. Kalyakina,

^ab Valentina V. Utochnikova,

^bc Manuel Zimmer,^d Fabian Dietrich,

^d Anna M. Kaczmarek,

^e Rik Van Deun,

^e Andrey A. Vashchenko,^f Alexander S. Goloveshkin,^g Martin Nieger,^h Markus Gerhards,

^d Ute Schepersⁱ and Stefan Bräse

*^ai

Author affiliations

* Corresponding authors

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

^b Lomonosov Moscow State University, Leninskie Gory, 1, Moscow, Russia

^c SIA Evoled, Puskina iela 1A-24, Riga, Latvia

^d Chemistry Department and Research Center Optimas, TU Kaiserslautern, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany

^e Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Gent, Belgium

^f P.N. Lebedev Physical Institute, Leninsky prosp. 53, Moscow, Russia

^g A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, INEOS, Moscow, Russia

^h Department of Chemistry, University of Helsinki, P. O. Box 55, Finland

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

Abstract

We have synthesized Eu(III) ternary complexes possessing record photoluminescence yields up to 90%. This high luminescence performance resulted from the absence of quenching moieties in the Eu coordination environment and an efficient energy transfer between ligands, combined with a particular symmetry of the coordination environment.

Chemical Communications

Remarkable high efficiency of red emitters using Eu(iii) ternary complexes†

Abstract

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Remarkable high efficiency of red emitters using Eu(III) ternary complexes

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