| Author |
Volz, Daniel Trigub, Alexander L. Kuzmina, Natalia P. Utochnikova, Valentina V. Bräse, Stefan Schepers, Ute Zubavichus, Yan V. Bushmarinov, Ivan S. Rönicke, Franziska Kalyakina, Alena S. Ananyev, Ivan V. Eremenko, Igor L. Van Deun, Rik |
| Description |
Author Affiliation: Kalyakina AS ( Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe (Germany).); Utochnikova VV ( Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, build.3, 119991, Moscow (Russian Federation).); Bushmarinov IS ( Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, build.3, 119991, Moscow (Russian Federation).); Ananyev IV ( P. N. Lebedev Physical Institute, Leninsky prosp. 53, 119991, Moscow (Russian Federation).); Eremenko IL ( A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, INEOS, 119991, Moscow (Russian Federation).); Volz D ( A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, INEOS, 119991, Moscow (Russian Federation).); Rönicke F ( Kurnakov Institute of General and Inorganic Chemistry, Leninsky prosp. 31, 119991, Moscow (Russian Federation).); Schepers U ( Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe (Germany).); Van Deun R ( Cynora GmbH, Werner-von-Siemens-Straße 2-6, 76646 Bruchsal (Germany).); Trigub AL ( Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany).); Zubavichus YV ( Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany).); Kuzmina NP ( L3-Luminescent Lanthanide Lab, f-Element Coordination Chemistry, Inorganic and Physical Chemistry Department, Ghent University, Krijgslaan 281, building S3, 9000 Gent (Belgium).); Bräse S ( NRC 'Kurchatov Institute', Akademika Kurchatova pl. 1, 123182, Moscow (Russian Federation).) |
| Abstract |
Highly luminescent, photostable, and soluble lanthanide pentafluorobenzoates have been synthesized and thoroughly characterized, with a focus on $Eu^{III}$ and $Tb^{III}$ complexes as visible emitters and $Nd^{III},$ $Er^{III},$ and $Yb^{III}$ complexes as infrared emitters. Investigation of the crystal structures of the complexes in powder form and as single crystals by using X-ray diffraction revealed five different structural types, including monomeric, dimeric, and polymeric. The local structure in different solutions was studied by using X-ray absorption spectroscopy. The photoluminescence quantum yields (PLQYs) of terbium and europium complexes were 39 and 15 %, respectively; the latter value was increased almost twice by using the heterometallic complex $[Tb_{0.5}Eu_{0.5}(pfb)_{3}(H_{2}O)]$ (Hpfb=pentafluorobenzoic acid). Due to the effectively utilized sensitization strategy $(pfb)^{−}→Tb→Eu,$ a pure europium luminescence with a PLQY of 29 % was achieved. |
