A bi-functional luminescent Zn(II)-MOF for detection of nitroaromatic explosives and Fe3+ ions

Publication date: March 2018
Source:Sensors and Actuators B: Chemical, Volume 257
Author(s): Jian-Long Du, Xiao-Ying Zhang, Chao-Ping Li, Ju-Ping Gao, Jin-Xin Hou, Xu Jing, Ya-Juan Mu, Li-Jun Li
A luminescent Zn(II) metal-organic framework (MOF), [Zn3(L)2(bipy)(μ3-OH)2]·3H2O (1) (bipy=4,4′-bipyridine, H2L=9H-carbazolyl-3,6-dicarboxylic acid) was obtained by the reaction of a rigid ligand H2L and Zn(II) ions. Compound 1 possesses an interesting 3D network with [Zn9(μ3-OH)6(CO2)12] units as eighteen-connected nodes. Particularly, 1 shows highly sensitive response to nitroaromatic compounds (NACs) and Fe³⁺ ions through fluorescence quenching. At the same time, 1 can be easily recycled by washing with N,N'-dimethylformamide (DMF) or distilled water after sensing studies, indicating that it can be reused easily. Furthermore, the possible detection mechanisms have also been discussed.

Graphical abstract

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