A new highly sensitive cryogenic luminescent MOF thermometer built with pyromellitic acid

Thibault Amiaud (1) , Véronique Jubera (2) , Hélène Serier-Brault (1)

1 IMN - Institut des Matériaux de Nantes Jean Rouxel
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A ratiometric thermometer based on a mixed Eu-Tb metal-organic framework is reported with a maximum relative thermal sensitivity of 16.1% K-1 at 11 K making this material one of the best-performing thermometers currently reported in the literature. The sensing mechanism of {[Tb2-xEux(H(2)Btec)(Btec)(H2O)(2)]& BULL;4H(2)O}(n) (Btec = 1,2,4,5 Benzenetetracarboxylic acid) has been attributed to a phonon-assisted energy migration between neighboring Tb3+ ions in the structure.

Domaines: Matériaux; Instrumentations et Détecteurs [physics.ins-det]

Thibault Amiaud, Véronique Jubera, Hélène Serier-Brault. A new highly sensitive cryogenic luminescent MOF thermometer built with pyromellitic acid. Journal of Materials Chemistry C, 2023, 11 (32), pp.10951-10956. ⟨10.1039/d3tc02125d⟩. ⟨hal-04182580⟩