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

Safaei, Shirin, Wang, Jun, and Junk, Peter C. (2021) 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 of Solid State Chemistry, 294. 121762.

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Abstract

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).

Item ID: 66132
Item Type: Article (Research - C1)
ISSN: 1095-726X
Keywords: Metal-organic framework, Anion sensing, Fluorescent, Energy-transfer mechanism
Copyright Information: © 2020 Elsevier Inc.
Date Deposited: 17 Feb 2021 18:27
FoR Codes: 34 CHEMICAL SCIENCES > 3402 Inorganic chemistry > 340211 Transition metal chemistry @ 100%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences @ 100%
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