|(C<sub>4</sub>NH<sub>12</sub>)<sub>4</sub>|[M<sub>4</sub>Al<sub>12</sub>P<sub>16</sub>O<sub>64</sub>] (M = Co, Zn):
New Heteroatom-Containing Aluminophosphate Molecular Sieves with Two
Intersecting 8-Ring Channels
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Abstract
Two novel heteroatom-containing aluminophosphate molecular
sieves,
|(C<sub>4</sub>NH<sub>12</sub>)<sub>4</sub>|[M<sub>4</sub>Al<sub>12</sub>P<sub>16</sub>O<sub>64</sub>] (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<sub>4</sub> tetrahedra and PO<sub>4</sub> tetrahedra to form a three-dimensional
anionic [M<sub>4</sub>Al<sub>12</sub>(PO<sub>4</sub>)<sub>16</sub>]<sup>4–</sup> 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
