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Lanthanide functionalized MOFs thin films as effective luminescent materials and chemical sensor for ammonia

Abstract

In this work, a series of transparent luminescent MOFs thin films are designed and prepared by assembling the lanthanide functionalized UiO-67 (Ln(TTA/TAA)@UMOF, Ln = Eu, Tb, Er, Nd, TTA = 2-thenoyltrifluoroacetone, TAA = 1,1,1-trifluoropentane-2,4-dione) on the organosilane linker (L) modified Al2O3 (A) using lanthanide ions as the bridge. Notably, the Ln(TTA/TAA)@UMOF is synthesized by introducing lanthanide ions and TTA/TAA into the framework of UMOF via a facial and non-destructive post-synthesis modification(PSM) strategy. Because there are multiple antennas including L, the ligand of UMOF, β-diketone (TTA/TAA) transferring energy to lanthanide ions, these thin films exhibit excellent luminescent properties. Interestedly, the Eu@UMOF-Eu-LA film can selectively recognize ammonia without the interference of other indoor polluted gases. Further investigation reveals the Eu@UMOF-Eu-LA film sensor has superior performances including quick response, outstanding selectivity and high sensitivity (LOD = 9 ppm) towards ammonia. These results illustrate the Eu@UMOF-Eu-LA film has enormous potential to detect ammonia practically.

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Supplementary files

Article information


Submitted
02 Sep 2020
Accepted
13 Oct 2020
First published
14 Oct 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Lanthanide functionalized MOFs thin films as effective luminescent materials and chemical sensor for ammonia

W. Wan and B. Yan, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT03069D

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