title: Cryogenic luminescent thermometers based on multinuclear Eu3+/Tb3+mixed lanthanide polyoxometalates.
abstract: Here, the excellent thermal sensing capability of a multinuclear lanthanide polyoxometalate in the cryogenic region (<100 K) is presented for the first time. Up till now, no lanthanide polyoxometalates have been studied for their use as ratiometric luminescent thermometers. The investigated Tb3+polyoxometalate cluster is doped with 1.6% (P1) and 8.4% (P2) of Eu3+ions. When excited into the Mo-O charge transfer bands, at room temperature only the emission of the Eu3+ions is observed suggesting a very efficient energy transfer between Mo-O→Tb3+→Eu3+. Only in the cryogenic region the emission of Tb3+is also witnessed.
authors.affiliation: L3, Luminescent Lanthanide Lab, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium. anna.kaczmarek@ugent.be rik.vandeun@ugent.be.
authors.forename: A M
authors.initials: AM
authors.lastname: Kaczmarek
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: B
authors.initials: B
authors.lastname: Laforce
authors.forename: L
authors.initials: L
authors.lastname: Vincze
authors.forename: K
authors.initials: K
authors.lastname: Van Hecke
authors.forename: R
authors.initials: R
authors.lastname: Van Deun