Cryogenic luminescent thermometers based on multinuclear Eu3+/Tb3+ mixed lanthanide polyoxometalates. Issue 18 (12th April 2017)

• Record Type: Journal Article
• Authors: Kaczmarek, A. M.; Liu, J.; Laforce, B.; Vincze, L.; Van Hecke, K.; Van Deun, R.
• Is Part Of: Dalton transactions. Volume 46:Issue 18(2017)
• Page Start: 5781
• Page End: 5785
• Publication Date: 2017-04-12
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt01058c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : A novel optical thermometer based on a multinuclear mixed Eu 3+ /Tb 3+ polyoxometalate, displaying excellent temperature sensing properties in the cryogenic region (<100 K), is proposed. 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 Tb 3+ polyoxometalate cluster is doped with 1.6% (P1 ) and 8.4% (P2 ) of Eu 3+ ions. When excited into the Mo–O charge transfer bands, at room temperature only the emission of the Eu 3+ ions is observed suggesting a very efficient energy transfer between Mo–O→Tb 3+ →Eu 3+ . Only in the cryogenic region the emission of Tb 3+ is also witnessed.