摘要
以3-甲氨基丙胺为结构导向剂,在水热条件下合成了1个具有三维开放骨架结构的微孔磷酸铝化合物[C4N2H14][H2Al3P3O14](1),并通过X射线单晶衍射确定了其结构,用粉末X射线衍射(PXRD)、热重(TG)、元素分析(ICP及CHN)和扫描电子显微镜(SEM)对其进行表征.结果表明,化合物1属正交晶系,Pbca空间群,晶胞参数a=1.59839(11)nm,b=0.99402(6)nm,c=1.82261(11)nm,V=2.8958(3)nm3.化合物1的无机骨架由铝氧多面体(AlO5/AlO6)和磷氧四面体(PO4)严格交替连接构筑而成,形成了在[010]方向上具有一维十元环孔道的三维阴离子开放骨架.每个P原子通过桥氧原子与相邻的4个Al原子相连,而Al原子除了通过桥氧原子与相邻的4个P原子相连之外,还通过羟基的桥氧原子与1个或2个Al原子相连,分别形成五配位和六配位的Al.化合物1在550℃空气或氧气气氛下灼烧5 h后转变为具有ATV分子筛结构的微孔磷酸铝分子筛AlPO4-25,且一直稳定到800℃.
In the presence of N-methyl-1,3-diaminopropane, a new microporous aluminophosphate compound [C4N2H14]2+[H2Al3P3O14]2-(1) was synthesized under hydrothermal condition. Single-crystal X-ray diffraction structural analysis showed that compound 1 crystallizes in the orthorhombic space group Pbca with a=1.59839(11) nm, b=0.99402(6) nm, c=1.82261(11) nm, V=2.8958(3) nm3. Its framework consists of AlO5/AlO6 and PO4 units forming 10-ring channels along [010] direction, where the templates exists. Compound 1 transformed to AlPO4-25(ATV) upon calcination at 550℃. It was further characterized by powder X-ray diffraction(PXRD), inductively coupled plasma(ICP) analysis, scanning electron microscopy(SEM), thermal gravimetric(TG) analysis, and elemental analysis.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第7期1571-1575,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21171063)
优秀青年科学基金(批准号:21222103)
国家“九七三”计划项目(批准号:2011CB808703)资助
关键词
分子筛
磷酸铝
开放骨架
水热合成
Molecular sieve
Aluminophosphate
Open framework
Hydrothermal synthesis