Abstract
A new three-dimensional organically templated [C 4N 2H 12] 0.5·[Zn 3(HPO 3) 4]·H 3O was hydrothermally synthesized and characterized by single crystal X-ray diffraction. The three-dimensional framework is built up from two-dimensional layers with 4.8-membered rings and one-dimensional chains of 4-membered rings. The structure has strictly alternating ZnO 4 tetrahedra and HPO 3 pseudo pyramids which are linked through their vertices giving rise to the three-dimensional architecture with 8,12-membered ring channels. The protonated water molecules and diprotonated piperazine are located in the 8-membered and 12-membered channels, respectively. The compound crystallizes in monoclinic system, space group P2 1/ n with cell parameters, a=9.6739(16) A ̊ , b=8.4528(13) A ̊ , c=20.257(4) A ̊ , β=97.966(5)°, Z=4, R=0.023, and R w=0.060. It was characterized by the powder X-ray diffraction, differential thermal-thermogravimetric analyses, IR spectroscopy and proton-decoupled 31P MAS NMR solid-state spectroscopy.
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