Mixed-Ligand Zn-MOFs for Highly Luminescent Sensing of Nitro Compounds

Authors

  • Hao Wang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 (P. R. China), Fax: (+86) 431-85698041 http://zhongmingsun.weebly.com/
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  • Dr. Weiting Yang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 (P. R. China), Fax: (+86) 431-85698041 http://zhongmingsun.weebly.com/
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  • Prof. Zhong-Ming Sun

    Corresponding author
    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 (P. R. China), Fax: (+86) 431-85698041 http://zhongmingsun.weebly.com/
    • State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022 (P. R. China), Fax: (+86) 431-85698041 http://zhongmingsun.weebly.com/

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Abstract

Three ZnII metal-organic frameworks (Zn-MOFs), [Zn2(tib)(HL1)(H2L1)0.5]⋅2H2O (), [Zn2(tib)(L2)]⋅H2O () and [Zn3(tib)(L3)2(H2O)6]⋅2 H2O (), have been prepared by reactions of 1,3,5-tris(1-imidazolyl)benzene (tib), and biphenyl-3,3′,4,4′-tetracarboxylic acid (H4L1), 4,4′-oxydiphthalic acid (H4L2), or benzene-1,3,5-tricarboxylic acid (H3L3) with corresponding ZnII salts, respectively. Single crystal structure analyses reveal that and are constructed by Zn-centered polyhedra, tib and multidentate tetracarboxylate ligands to form 3-dimensional frameworks. In contrast, when the tetracarboxylate ligands were replaced by tricarboxylate ligand, layered structure of is produced. These compounds are further characterized by powder X-ray diffraction, element analyses, thermogravimetric analyses and photoluminescent spectroscopy. The luminescent properties of three Zn-MOFs dispersed in different solvents have been investigated systematically, demonstrating high sensitivity for the detection of nitro compounds via a fluorescence quenching mechanism.

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