Highly Luminescent, Water-Soluble Lanthanide Fluorobenzoates: Syntheses, Structures and Photophysics, Part I: Lanthanide Pentafluorobenzoates.
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 [Tb0.5 Eu0.5 (pfb)3 (H2 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.
Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe (Germany).|Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, build.3, 119991, Moscow (Russian Federation).
Alena S
AS
Kalyakina
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, build.3, 119991, Moscow (Russian Federation).|P. N. Lebedev Physical Institute, Leninsky prosp. 53, 119991, Moscow (Russian Federation).
Valentina V
VV
Utochnikova
A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, INEOS, 119991, Moscow (Russian Federation).
Ivan S
IS
Bushmarinov
A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilova St. 28, INEOS, 119991, Moscow (Russian Federation).
Ivan V
IV
Ananyev
Kurnakov Institute of General and Inorganic Chemistry, Leninsky prosp. 31, 119991, Moscow (Russian Federation).
Igor L
IL
Eremenko
Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe (Germany).|Cynora GmbH, Werner-von-Siemens-Straße 2-6, 76646 Bruchsal (Germany).
Daniel
D
Volz
Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany).
Franziska
F
Rönicke
Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany).
Ute
U
Schepers
L3-Luminescent Lanthanide Lab, f-Element Coordination Chemistry, Inorganic and Physical Chemistry Department, Ghent University, Krijgslaan 281, building S3, 9000 Gent (Belgium).
Rik
R
Van Deun
NRC "Kurchatov Institute", Akademika Kurchatova pl. 1, 123182, Moscow (Russian Federation).
Alexander L
AL
Trigub
NRC "Kurchatov Institute", Akademika Kurchatova pl. 1, 123182, Moscow (Russian Federation).
Yan V
YV
Zubavichus
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1, build.3, 119991, Moscow (Russian Federation).
Natalia P
NP
Kuzmina
Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe (Germany). braese@kit.edu.|Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen (Germany). braese@kit.edu.
Stefan
S
Bräse
aromatic carboxylates; fluorobenzoates; lanthanides; luminescence; near-IR; structure elucidation