MAPO-CHA(M=Mn，Fe，Co，Zn)系列过渡金属取代磷酸铝化合物的合成、结构与性质

Syntheses and Characterizations of a Series of Transition Metal-substituted Aluminophosphates MAPO-CHA(M=Mn,Fe,Co,Zn)

在水热体系中,以2-胺乙基哌嗪分解得到的二乙胺为模板剂,合成了一系列具有CHA结构的过渡金属取代磷酸铝化合物MAl(PO4)2[(C2H5)2NH2](命名为MAPO-CHA,M=Mn,Fe,Co,Zn),其M/Al原子比为1.单晶结构分析表明,MnAPO-CHA晶体属于三方晶系,R3空间群,晶胞参数a=1.4003(2)nm,c=1.5236(3)nm,V=2.5873(7)nm3,Z=9,其无机骨架由Al(Mn)O4四面体和PO4四面体交替连接形成具有分子筛CHA的拓扑结构,单质子化的二乙胺离子位于八元环孔道中.X射线粉末衍射分析表明,这些化合物是同构的,并均具有荧光性质,其中,化合物MAPO-CHA(M=Mn,Fe,Co)还具有弱的反铁磁交换作用.

Open-framework metal-substituted aluminophosphates have attracted more attentions owing to their interesting structural chemistry and potential applications in catalysis, ion exchange, magnetism, and photoluminescence. A series of metal-substituted aluminophosphates MAl（PO4）2[（C2H5）2NH2]（denoted as MAPO-CHA, M=Mn, Fe, Co, Zn） was prepared under the hydrothermal conditions. Their frameworks are analogous to zeotype CHA structure in which 50% of the aluminum sites are replaced by transitional-metal ions. These compounds show photoluminescent properties, but the emission intensities are different due to the different transitional metals. Magnetic measurements reveal that there is very weak antiferromagnetic interaction among the metal centers of MAPO-CHA（M=Mn, Fe, Co）. Crystal data of MnAPO-CHA： space group R3, a=1.4003（2） nm, c=1.5236（3） nm, V=2.5873（7） nm3, Z=9.