A Highly Stable Yttrium Organic Framework as a Host for Optical Thermometry and D2O Detection

Author(s)

Chamberlain, Thomas W. ; Perrella, Rafael, V ; Oliveira, Tamires M. ; de Sousa Filho, Paulo C. ; Walton, Richard, I

• Document type: Journal article
• Source: CHEMISTRY-A EUROPEAN JOURNAL; v. 28, n. 19, p. 8-pg., 2022-03-04.

Abstract

The yttrium organic framework (Y0.89Tb0.10Eu0.01)(6)(BDC)(7)(OH)(4)(H2O)(4) (BDC=benzene-1,4-dicarboxylate) is hydrothermally stable up to at least 513 K and thermally stable in air in excess of 673 K. The relative intensities of luminescence of Tb3+ and Eu3+ are governed by Tb3+-to-Eu3+ phonon-assisted energy transfer and Tb3+-to-ligand back transfer and are responsible for the differing temperature-dependent luminescence of the two ions. This provides a ratiometric luminescent thermometer in the 288-573 K temperature range, not previously seen for MOF materials, with a high sensitivity, 1.69 +/- 0.04 % K-1 at 523 K. In aqueous conditions, loosely bound H2O can be replaced by D2O in the same material, which modifies decay lifetimes to yield a quantitative luminescent D2O sensor with a useful sensitivity for practical application. (AU)

• FAPESP's process: 20/10518-0 - Inorganic nanoparticles as new optical tools for nanoscale sensing
• Grantee: Paulo Cesar de Sousa Filho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 18/08334-9 - New advanced materials for sensing applications: a collaborative project on structural and spectroscopic characterisation of novel rare-earth solids
• Grantee: Paulo Cesar de Sousa Filho
• Support Opportunities: Regular Research Grants