Ga_8(H_2O)_6(HPO_3)_(14)·(C_3N_2H_6)_3·H_3O:含有经典6* 1 SBU的新型三维开放骨架亚磷酸镓

Ga_8(H_2O)_6(HPO_3)_(14)·(C_3N_2H_6)_3·H_3O:a Novel 3D Open-framework Gallium Phosphite with Classical 6* 1 SBU

为了丰富亚磷酸盐结构,为多孔材料的定向合成提供一定的实验数据,在溶剂热的条件下,以咪唑为结构导向剂合成了一个具有三维开放骨架结构的新型亚磷酸镓化合物Ga8(H2O)6(HPO3)14·(C3N2H6)3·H3O(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。单晶X-射线衍射分析结果表明,化合物1属于三斜晶系,P-3c1空间群,晶胞参数为a=b=1.33388(8)nm,c=1.7886(2)nm,γ=120(4)°,Z=2。其结构是由Ga O6八面体和[HPO32-]假四面体单元相互连接构成。该结构沿着[100]和[010]方向具有12元环孔道。值得注意的是,在化合物1的结构中存在两种不同的次级结构单元(SBU):经典的6*1单元Ga3P4和齿轮状的Ga P6单元。

In order to enrich the structure of metal phosphite and provide experimental data for the oriented synthesis of porous materials, a new 3D open-framework gallium phosphite Ga8（H2O）6（HPO3）14·（C3N2H6）3· H3O（compound 1） was synthesized under solvothermal condition using imidazole as structure directing agent, and further been characterized by powder XRD, infrared spectroscopy,thermogravimetric,inductively coupled plasma and CHN elemental analyses.Single crystal X-ray diffraction analysis reveals that compound 1 crystallizes in the trigonal space group P-3c1,with cell parameters a = b = 1.33388（8） nm,c = 1.7886（2） nm,γ = 120（4） °,Z = 2.The open-framework of compound 1 is built by Ga O6 octahedra and [HPO3^2-]pseudo-pyramids units with interconnection and the structure shows 12-ring channels along [100] and [010] directions.It is noted that two different SBUs existed in the framework： typical 6＊ 1 unit Ga3P4 and tooth-wheel type unit Ga P6.