Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (5): 762-766.doi: 10.1007/s40242-019-9099-0

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Assembly of Two Isostructural Metal-organic Frameworks Based on Hetero-N,O Donor Ligand for Detecting Nitro Explosives

WANG Dongmei, LOU Shengjun, YING Yiting, GUO Zhiqi, WANG Lijun   

  1. Key Laboratory for Advanced Catalysis Materials, Ministry of Education, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China
  • Received:2019-04-08 Online:2019-10-01 Published:2019-09-24
  • Contact: WANG Dongmei E-mail:dmwang@zjnu.edu.cn
  • Supported by:
    Supported by the Natural Science Foundation of Zhejiang Province, China(No.LQ18B010002).

Abstract: Two isostructural metal-organic frameworks,[NO3] [M3(H2O)3O(TBA)3]·2DMF·6H2O(1 and 2)[M=In and Fe, H2TBA=4-(1H-tetrazol-5-yl)-benzoic acid], have been successfully synthesized. Compounds 1 and 2 have three-dimensional structures bridged via the typical 6-connected tri-nuclear cluster units M3O(COO)6 and linear linker H2TBA. The whole 3D framework possesses a 6-connected acs topology. Notably, by the fluorescence technique, compound 1 can detect nitro explosives through fluorescence quenching effect, especially for 2,4,6-trinitrophenol(TNP, Ksv=3.64×104 L/mol). Furthermore, the fluorescence spectrum red shifts as the number of-NO2 group increases. Based on the aforementioned consideration, compound 1 can be considered as a potential luminescent probe for the detection of TNP.

Key words: Metal-organic framework, Crystal structure, Fluorescence detection, Nitro explosive