1344吡啶羧酸配体构筑的Cu(Ⅱ)-MOFs及其染料吸附降解性能OACSTPCD

In order to investigate the effects of different synthesis conditions on the micro-struc-tures and macro-properties of MOFs,two metal-organic frameworks(MOFs){[Cu2(L)2·C2H3N]}n(1)and{[Cu(HL)2]}n(2)were prepared by using the copper sulfate(CuSO4·5H2O)and 6-(pyridin-3'-yl)isophthalic acid(H2L)as the building units under the different reaction con-ditions.Compound 1 and 2 were fully studied through structure analysis,thermogravimetric a-nalysis(TGA)and FT-IR spectroscopy.Single crystal data reveals that compound 1 and 2 crys-tallize in the monoclinic crystal system with the P21/c space group.Structure analysis indicates that compounds 1 shows a three-dimensional dense packing structure based on the secondary building units dinuclear paddle wheel shaped[Cu2(COO)4](SBUs).Structure analysis reveals that compounds 2 shows a 2D layer structure,which was further connected by the hydrogen bonds[O3—H…O4]to give a 3D network.Topological analysis for compounds 1 and 2 show that 1 can be simplified as a two connect rtl network with the point symbol of(42.610.83),and 2 can be viewed as a unnodol connect sql network with the point symbol of(44.62).In order to study the properties of the compounds 1 and 2 in aqueous solution,three different dyes were used to char-acterize the dye degradation properties of 1 and 2 using ultraviolet/visible spectroscopy(UV)at the same time.The degradation properties of compounds 1 and 2 on different dyes at the same time intervals show that compound 2 shows a certain chemical adsorption and degradation ability for malachite green in aqueous solution.