Issue 7, 2022

Temperature- and solvent-induced reversible single-crystal-to-single-crystal transformations of TbIII-based MOFs with excellent stabilities and fluorescence sensing properties toward drug molecules

Abstract

Recently, single-crystal-to-single-crystal conversion has been a hot topic in the field of metal–organic framework (MOF) materials, which could improve the stability and properties due to structural changes. A new TbIII-based MOF ([Tb4(BTDI)3(DMF)4]n, JXUST-12) has been designed and synthesized by the incorporation of TbIII ions and H4BTDI ligands (5,5′-(benzo[c][1,2,5]thiadiazole-4,7-diyl)diisophthalic acid) featuring a fluorescent unit. Very interestingly, the reversible single-crystal-to-single-crystal transformation between JXUST-12 and {[Tb4(BTDI)3(H2O)4]·4H2O·solvents}n (JXUST-12a) occurred, and thus the enhancement of water and pH stabilities has been achieved. Because of the presence of TbIII ions and the fluorescent organic ligand, JXUST-12 and JXUST-12a can be used as luminescent sensors for the detection of drugs (NFT = nitrofurantoin, NZF = nitrofurazone, and DCN = 2,6-dichloro-4-nitroaniline). Furthermore, theoretical caculations and experimental studies suggest that the luminescence quenching of JXUST-12 and JXUST-12a for the detection of NFT, NZF and DCN may be attributed to a competitive energy absorption and photoinduced electron transfer mechanism. Remarkably, fluorescent test papers and composite films based on JXUST-12 and JXUST-12a have been developed to simply detect drugs through the visual change of the luminescence colour.

Graphical abstract: Temperature- and solvent-induced reversible single-crystal-to-single-crystal transformations of TbIII-based MOFs with excellent stabilities and fluorescence sensing properties toward drug molecules

Supplementary files

Article information

Article type
Research Article
Submitted
04 1 2022
Accepted
09 2 2022
First published
09 2 2022

Inorg. Chem. Front., 2022,9, 1504-1513

Temperature- and solvent-induced reversible single-crystal-to-single-crystal transformations of TbIII-based MOFs with excellent stabilities and fluorescence sensing properties toward drug molecules

Y. Li, B. Chai, H. Xu, T. Zheng, J. Chen, S. Liu and H. Wen, Inorg. Chem. Front., 2022, 9, 1504 DOI: 10.1039/D2QI00023G

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