|(C ₄NH ₁₂) ₄|[M ₄Al ₁₂P ₁₆O ₆₄] (M = Co, Zn): New heteroatom-containing aluminophosphate molecular sieves with two intersecting 8-ring channels

Two novel heteroatom-containing aluminophosphate molecular sieves, |(C ₄NH ₁₂) ₄|[M ₄Al ₁₂P ₁₆O 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.