Issue 23, 2017

Metal–organic frameworks constructed from tib and carboxylate acid ligands: selective sensing of nitro explosives and magnetic properties

Abstract

Four metal–organic frameworks, namely [Cd2(tib)(btb)(H2O)2]·NO3·2.5DMF (1), [Cd(tib)(H2dhbqdc)0.5(NO3)]·6H2O (2), [Co(tib)(1,4-ndc)]·2DMF (3), and [Cu3(tib)2(2,6-ndc)2(H2O)2]·2NO3·2H2O (4), were synthesized based on 1,3,5-tris(1-imidazolyl)benzene and diverse carboxylic acid ligands. They have been characterized by elemental analysis, infrared spectroscopy (IR), powder X-ray diffraction (PXRD), thermogravimetric analyses (TGA) and single crystal X-ray diffraction. Compound 1 is a 3D framework constructed from a binuclear Cd cluster with (3,3,6)-connected (63)2(69·86) topology. Compound 2 exhibits a 2D wavy layered structure with (3,4)-connected topology, and compound 3 displays a two-fold interpenetrating network with (3,5)-connected topology. Compound 4 can be regarded as a three-fold interpenetrating framework. Moreover, compounds 1 and 2 can be used as fluorescent sensors sensing small molecules with high selectivity. In this context, we selected the typical toxic explosives, TNP, namely 2,4,6-trinitrophenol and NB, namely nitrobenzene, as examples to investigate the properties of sensing. Furthermore, the magnetic properties of compounds 3 and 4 are investigated.

Graphical abstract: Metal–organic frameworks constructed from tib and carboxylate acid ligands: selective sensing of nitro explosives and magnetic properties

Supplementary files

Article information

Article type
Paper
Submitted
12 Apr 2017
Accepted
08 May 2017
First published
09 May 2017

Dalton Trans., 2017,46, 7567-7576

Metal–organic frameworks constructed from tib and carboxylate acid ligands: selective sensing of nitro explosives and magnetic properties

L. Yang, L. Cao, X. Li, C. Qin, L. Zhao, K. Shao and Z. Su, Dalton Trans., 2017, 46, 7567 DOI: 10.1039/C7DT01306J

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