Temperature sensors based on europium polyoxometalate and mesoporous terbium metal–organic framework. Issue 26 (18th June 2021)

• Record Type: Journal Article
• Authors: Viravaux, Cédric; Oms, Olivier; Dolbecq, Anne; Nassar, Emma; Busson, Lucas; Mellot-Draznieks, Caroline; Dessapt, Rémi; Serier-Brault, Hélène; Mialane, Pierre
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 26(2021)
• Page Start: 8323
• Page End: 8328
• Publication Date: 2021-06-18
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc01532j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A temperature sensor based on lanthanide molecular species immobilized in a lanthanide metal–organic framework exhibits high relative thermal sensitivity in the physiological domain. Abstract : The first example of ratiometric luminescent thermometers based on lanthanide molecular species encapsulated in a lanthanide metal–organic framework (MOF) is reported. In EuW10 @Tb-TATB, the [EuW10 O36 ] 9− polyoxometalate (POM) is incorporated into the cavities of the mesoporous terbium MOF Tb-TATB with two different POM loadings (9.1 and 19.5 wt%). Eu 3+ and Tb 3+ ions of the POM and MOF, respectively, act as dual emitters. Optical measurements evidence efficient Tb 3+ -to-Eu 3+ energy transfer, suggesting that the EuW10 units are close to terbium centers. These observations are supported by computational investigations whereby a favored localisation of the EuW10 POM in the MOF's pores is found close to Tb-centers evidencing hydrogen bond type interactions between terminal oxygen atoms of the POM and Tb-coordinated water molecules. The reported materials act as temperature sensors in the physiological domain, exhibiting high relative thermal sensitivities of 2.68% K −1 and 2.37% K −1 at 300 K for the 9.1 wt% and 19.5 wt% composites, respectively, with a thermal uncertainty of 0.09 K.