Abstract
Two three-dimensional open-framework zinc phosphites, H 2aem·Zn 3(HPO 3) 4·0.5H 2O ( 1) and H 2apm·Zn 3(HPO 3) 4 ( 2), have been synthesized by a phosphorous acid flux method, where aem=4-(2-aminoethyl)morpholine and apm=4-(3-aminopropyl)morpholine. Compound 1 crystallizes in the monoclinic system, P2 1/ c, a=9.5852(7) Å, b=20.3941(8) Å, c=10.5339(8) Å, β=94.125(9)°, V=2053.8(2) Å 3, Z=4, R 1=0.0319, w R 2=0.0628. Compound 2 crystallizes in the monoclinic system, P2 1/ n, a=8.589(2) Å, b=14.020(3) Å, c=16.606(3) Å, β=97.190(8)°, V=1983.9(7) Å 3, Z=4, R 1=0.0692, w R 2=0.1479. Both compounds are based on (3,4)-connected networks with 8- and 12-ring channels, which are constructed from Zn 3(HPO 3) 4 clusters as the same secondary building units. These inorganic clusters are spatially organized by different structure-directing agents into different three-dimensional frameworks.
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