具有十二元环空旷骨架的Mn3Al6(PO4)12·4tren·11H2O的水热合成与表征

自从1982年美国联合碳化公司(U.C.C.)开发出系列磷酸铝分子筛(AlPO4-n,n代表不同的骨架类型)1]以来,新型微孔结构磷酸铝的开发一直吸引着人们的广泛关注2].与此同时,杂原子磷酸铝分子筛的研究受到了人们的高度重视,许多元素(Fe,Mn,Co,Zn等)可以作为杂原子进入磷酸铝的分子筛骨架3～5].其中,含有特殊催化活性的过渡金属离子Mn的磷酸铝备受关注6,7].1999年,徐耀华等8]合成出具有新颖三维开放骨架的磷酸铝Al9(PO4)12(C24H91N16)·17H2O.最近,Beitone等9,10]研究了Zn和Fe元素在此骨架中的取代情况.本文中,我们首次将Mn元素引入…

Hydrothermal Synthesis and Characterization of a Manganese(Ⅱ)-substituted Aluminum Phosphate Mn3Al6(PO4)12·4tren·11H2O with 12-Membered Ring Channel Open Framework

A three-dimensional manganese(Ⅱ)-substituted aluminum phosphate, Mn3Al6(PO4)12·4tren·11H2Otren is tris(2-aminoethyl)amine], was synthesized hydrothermally. Its structure was determined by single-crystal X-ray diffraction analysis and further characterized by X-ray powder diffraction, ICP, TG analyses and magnetic susceptibility measurements. It crystallizes in the cubicsystem, space group I-43m(No. 217) with a=1.683 51(4)nm, V=4.771 4(2) nm3, Z=2, R1=0.043 9 and wR2=0.132 4I>2σ(I)]. The open framework built up from strict alternation of TO4/AlO4 and PO4 tetrahedra through corner-sharing vertex oxygen atoms. It contains 12-membered ring channels. The Mn atoms of the framework are bivalence proved by magnetic susceptibility measurements.