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Issue 27, 2018
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Three new Zn-based metal–organic frameworks exhibiting selective fluorescence sensing and photocatalytic activity

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Abstract

Three different metal–organic frameworks, [Zn5(L)4(H2tpim)2(FA)4(H2O)2]n (1), [Zn(L)(Htpim)]n (2) and [Zn(L)(Htpim)]n (3) (HFA = formic acid), have been synthesized in a one-pot solvothermal reaction of Zn(NO3)2·6H2O, 5-nitroisophthalic acid (H2L), and 2,4,5-tri(4-pyridyl)-imidazole (Htpim). Single-crystal X-ray diffraction analyses reveal that compound 1 is a double layer 2D {4·6·72·8·9}{4·6·8}3{6·7·9}2{72·10} topology network because of the existence of FA. In contrast, 2 displays an irregular 2D (44) topology, while 3 exhibits a 2D parallelogrammic (44) topology net built by symmetrical L and Htpim ligands in an up and down mode with binuclear [Zn2(COO)2] units. As far as the ratios of Zn/L/Htpim are concerned, 2 and 3 can be considered as isomers. The thermal stabilities, luminescence properties, selective fluorescence sensing and photocatalytic activities of 1–3 were also investigated. They all display high sensitivity as fluorescent sensors in the detection of acetone (ACE). Moreover, 1–3 exhibit relatively good photocatalytic activity towards the degradation of rhodamine B in aqueous solution under UV irradiation.

Graphical abstract: Three new Zn-based metal–organic frameworks exhibiting selective fluorescence sensing and photocatalytic activity

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Publication details

The article was received on 14 Apr 2018, accepted on 28 May 2018 and first published on 29 May 2018


Article type: Paper
DOI: 10.1039/C8CE00598B
Citation: CrystEngComm, 2018,20, 3877-3890
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    Three new Zn-based metal–organic frameworks exhibiting selective fluorescence sensing and photocatalytic activity

    J. Wang, Y. Zhang, Y. Chen, P. Si, Y. Pan, J. Yang, R. Fan and Z. Li, CrystEngComm, 2018, 20, 3877
    DOI: 10.1039/C8CE00598B

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