A hydrostable and bromine-functionalized manganese-organic framework with luminescence sensing of Hg2+ and antiferromagnetic properties

Publication date: Available online 27 September 2018Source: Journal of Solid State ChemistryAuthor(s): Yan Li, Deyun Ma, Chanchan Chen, Minchun Chen, Zhanhong Li, Yetao Wu, Shanshan Zhu, Guo PengAbstractA hydrostable and bromine-functionalized MOF with a sxd topology constructed from tetranuclear clusters, {[Mn2(Bript)2(4,4'-bpy)0.5(DMF)]∙(H2O)}n (1) (H2Bript = 4-Bromoisophthalic acid, 4,4'-bpy = 4,4'-bipyridine, DMF = dimethylformamide) was synthesized and structurally characterized. TGA and PXRD results show high thermal and water stability for the framework. 1 displays a 3D framework with the channel of 4.6 × 4.6 Å2 along the c axis. The framework exhibits a reversible and highly selective luminescent sensing function with respect to Hg2+ cation. Magnetic measurements reveal that the presence of weak antiferromagnetic couplings between the four Mn(II) ions in 1.Graphical abstractA hydrostable and bromine-functionalized manganese-organic open framework with a sxd topology was synthesized based on 4-Bromoisophthalate and 4,4'-bpy ligands by a solvothermal process and exhibited a highly selective and sensitive detection of Hg2+ with the detection limit of 48 μM.

Source: Journal of Solid State Chemistry - October 5, 2018 Category: Chemistry Source Type: research