Assembly of Two Isostructural Metal-organic Frameworks Based on Hetero-N,O Donor Ligand for Detecting Nitro Explosives
Dongmei Wang , Shengjun Lou , Yiting Ying , Zhiqi Guo , Lijun Wang
Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (5) : 762 -766.
Assembly of Two Isostructural Metal-organic Frameworks Based on Hetero-N,O Donor Ligand for Detecting Nitro Explosives
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, K sv=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.
Metal-organic framework / Crystal structure / Fluorescence detection / Nitro explosive
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