一例镍(Ⅱ)金刚石拓扑MOF的合成及其光催化降解性能

Synthesis and photocatalytic degradation performance of a nickel(Ⅱ)diamond topological MOF

以4-(2-甲基咪唑-1-基)苯甲酸(HMIBA)和Ni(NO_(3))_(2_)·6H_(2)O为原料,在溶剂热条件下合成了一例结构新颖的Ni(Ⅱ)配位聚合物:[Ni(MIBA)2]n,利用X-射线单晶衍射、元素分析、热重分析和红外光谱对配位聚合物进行了表征。X-射线单晶衍射的测定结果表明上述配位聚合物拥有三维空间结构。配位聚合物中相邻的Ni(Ⅱ)通过HMIBA配体桥联形成了扭曲的金刚石状笼,可容纳直径为9A的假想球体,并且配位聚合物沿着c轴方向存在较大尺寸的孔道结构。此外,配位聚合物对罗丹明B(RhB)和亚甲基蓝(MB)表现出优良的光催化降解性能,RhB和MB的降解率分别达到了75.4%和91%。

The title coordination polymer[Ni(MIBA)_(2)],was synthesized from 4-(2-methyl imidazole-1-yi)benzoic acid(HMIBA)and Ni(NO_(3))_(2)·6H_(2)O by solvothermal method and its structure was determined by X-ray single crystal analysis,elemental analysis,thermogravimetric analysis and IR.X-ray single crystal analysis reveals that the title coordination polymer was a three-dimensional structure.The adjacent Ni(Ⅱ)in the coordination polymer forms a distorted adamantanoid cage that can accommodate an imaginary sphere with a diameter of up to 9A through the bridging action of HMIBA ligand and the coordination polymer has a largesized pore structure along the C-axis direction.In addition,the coordination polymer exhibited good photocatalytic degradation performance for rhodamine B(RhB)and methylene blue(MB),respectively.the degradation rates of RhB and MB reached 75.4%and 91%.