新型磷酸铝分子筛AlPO_4-CJ_2的合成与结构研究

Studies on the Synthesis and Structure of a New Type of Aluminophosphate Molecular Sieves (AlPO_4-CJ_2)

在Al_2O_3-P_2O_5-六次甲基四胺-H_2O体系中,水热合成出新型磷酸铝分子筛(AlPO_4-CJ_2),培养了单晶,经多晶X射线衍射、四圆单晶结构测定及红外光谱研究证明,AlPO_4-CJ_2具有空旷的骨架结构,沿(100)和(001)方向具有8元环孔道,骨架中Al原子以AlO_5(三角双锥)和AlO_5F(扭曲八面体)形式存在,水分子氧的桥联产生Al—O—Al连接模式。

A novel aluminophosphate molecular sieve (A1PO4-CJ2) was synthesized hydrothermally from the system of Al2O3-P2O5-hexamethylenetetramine-H2O, and a large single crystal was obtained. It was proved that AIPO4-CJ2 hasan open framework, and has 8-T ring channels along the direction (100) and (001) respectively determined by X-ray diffraction, four-circle X-ray diffraction and IR spectrum and that the Al atoms of the framework are located in AlO5(distorted trigonal bipyramid) and AlO5F(distorted octahedron). A model of Al-O-Al linkage is formed by bridge of the oxygen atom of water molecules.