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Issue 17, 2018
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A 3D metal–organic framework with dual-aerial-octahedral trinucleate building units: synthesis, structure and fluorescence sensing properties

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Abstract

A six-coordinated 3D metal–organic framework (MOF), [ZnK(tatab)(CH3OH)]·3DMF·4.5CH3OH (JLNU-2, JLNU = Jilin Normal University, H3tatab = 4,4′,4′′-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl)) tribenzoic acid, DMF = N,N-dimethylformamide), has been purposefully constructed by combining the N-donor ligand H3tatab with aromatic π rings and d10 configuration metal Zn(II) nitrate under solvothermal conditions. The crystal structure reveals that JLNU-2 consists of a dual-aerial-octahedral trinuclear potassium cluster and zinc building units with N–H⋯O hydrogen bonding, which are further bridged by N-donor multicarboxylate ligands to produce a (3,6)-connected topological net in an interesting hot-wheel state. The special hydrogen bonding strongly promotes the molecular luminescence sensitivity. The experimental results show that JLNU-2 exhibits outstanding fluorescence quenching properties via an electron transfer mechanism from the electron-rich framework to the electron-withdrawing group of nitrobenzene. The fluorescence was quenched completely in the presence of 130 ppm of nitrobenzene. After 8 cycles, the quenching efficiency was maintained at 88.9%. As a result, the MOF material is extremely well qualified to be a fluorescence sensor for the detection of nitrobenzene owing to its supreme selectivity, sensitivity, anti-interference ability and recyclability.

Graphical abstract: A 3D metal–organic framework with dual-aerial-octahedral trinucleate building units: synthesis, structure and fluorescence sensing properties

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Publication details

The article was received on 28 Apr 2018, accepted on 01 Aug 2018 and first published on 06 Aug 2018


Article type: Paper
DOI: 10.1039/C8NJ02078G
Citation: New J. Chem., 2018,42, 14648-14654
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    A 3D metal–organic framework with dual-aerial-octahedral trinucleate building units: synthesis, structure and fluorescence sensing properties

    Y. Zhao, S. Zhang, W. Wang, Y. Xu and G. Che, New J. Chem., 2018, 42, 14648
    DOI: 10.1039/C8NJ02078G

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