Incorporation of thiazolothiazole fluorophores into a MOF structure: A highly luminescent Zn(II)-based MOF as a selective and reversible sensor for Cr2O72- and MnO4- anions
Journal Publication ResearchOnline@JCUAbstract
A highly luminescent Zn-II-MOF, [Zn-2 (TzTz)(2)(BDC)(2)]-2DMF, TzTz = 2,5-di (4-pyridyl)thiazolo I (Liu a al., 2019; Shen a al., 2018) [4,5]-d] thiazole and BDC = terephthalic acid), has been solvothermally assembled and fully characterized by single crystal X-ray crystallography, elemental analysis, FT-IR spectroscopy and X-ray diffraction (XRD). This transition-metal based luminescent MOF exhibits strong blue emission while capable as a selective sensor for detection of anions. Only trace amounts of fluorescent MOF can act as a highly selective and recyclable luminescent probe for the quantitative detection of Cr-VI and Mn-VII (Cr2O72-, MnO4-) : 4 anions in aqueous solutions with large quenching constants (9 x 10(7) M-1 and 4.8 x 10(3) M-1 for Cr2O72- and MnO4-) via an energy-transfer mechanism. The first sensing study of a TzTz-functionalized MOF material demonstrates the highest sensing ability among the previously reported fluorescent MOFs with detection limits for Cr2O72- and MnO4- ions in drinking water as low as 4 mu M (100 ppb).
Journal
Journal of Solid State Chemistry
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294
ISBN/ISSN
1095-726X
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Pages Count
7
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Publisher
Elsevier
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DOI
10.1016/j.jssc.2020.121762