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采用溶剂热法,合成了一个具有新颖三维超分子结构的亚磷酸-草酸镓化合物Ga(HPO3)(C2O4)(C3N2H4)·(C3N2H5)(化合物1),并通过粉末X-射线衍射,红外光谱、热重、ICP和CHN元素分析对化合物进行了表征。结果表明:该化合物属于正交晶系,Pnma空间群,晶胞参数为a=1.3288(3)nm,b=0.63614(13)nm,c=1.5364(3)nm,β=90°,Z=4。在化合物1中存在一个由[HPO3]单元和GaO5N八面体通过共顶点的氧原子组成的四元环梯形链。值得注意的是草酸根离子和咪唑离子镶嵌在一维链的两侧,相邻的两个链上的咪唑分子和草酸单元之间存在着强烈的氢键作用。正是由于这种氢键作用使化合物1的结构由一维链状变为三维超分子结构。此外,有机的咪唑分子在该化合物的合成中同时发挥了配体和模板剂的作用。
A novel three-dimensional supramolecular structure of Ga (HPO3) (C2O4) (C3N2H4) · (C3N2H5) (compound 1) was synthesized by solvothermal method. The powder X-ray diffraction and infrared spectra , Thermogravimetry, ICP and CHN elemental analysis. The results show that the compound belongs to the orthorhombic system with Pnma space group with unit cell parameters of a = 1.3288 (3) nm, b = 0.63614 (13) nm, c = 1.5364 4. In compound 1 there is a four-membered, trapezoidal chain of co-vertex oxygen atoms consisting of [HPO3] units and GaO5N octahedrons. It is worth noting that oxalate ions and imidazolium ions are embedded on both sides of the one-dimensional chain, and there is a strong hydrogen bond between the imidazole molecules and oxalic acid units on the two adjacent chains. It is because of this hydrogen bonding that the structure of compound 1 changes from one-dimensional chain to three-dimensional supramolecular structure. In addition, organic imidazole molecules function both as ligands and templating agents in the synthesis of this compound.