|(C _4NH _(12)) _4|[M _4Al _(12)P _(16)O _(64)] (M = Co, Zn): New heteroatom-containing aluminophosphate molecular sieves with two intersecting 8-ring channels

摘要

Two novel heteroatom-containing aluminophosphate molecular sieves, |(C _4NH _(12)) 4_|[M _4Al _(12)P _(16)O _(64)] (denoted MAPO-CJ69, M = Co and Zn), have been solvothermally synthesized using diethylamine as the structure-directing agent. The framework of MAPO-CJ69 exhibits a new zeolite topology which is constructed by strict alternation of metal-centered (Al/M)O _4 tetrahedra and PO _4 tetrahedra to form a three-dimensional anionic [M _4Al _(12)(PO _4) _(16)] ~(4-) framework. The structure contains two intersecting 8-ring channels along the [010] and [001] directions, and the protonated diethylamine cations reside in the 8-ring channels to achieve charge neutrality. The structure of MAPO-CJ69 is composed of the 4-4- secondary building unit (SBU), which has been found in some known zeolites, such as AFR, SFO, ZON, OWE, etc. The structural relationships between these zeolites have been discussed.