Hydrothermal synthesis and characterization of organically templated zincophosphites with two- and three-dimensional structures, [CH 3CH(NH 3)CH 2NH 3]·[Zn 2(HPO 3) 3]·H 2O and [H 3N(CH 2) 6NH 3]·[Zn 3(HPO 3) 4

Abstract

Two organically templated zincophosphites, [CH 3CH(NH 3)CH 2NH 3]·[Zn 2(HPO 3) 3]·H 2O ( 1) and [H 3N(CH 2) 6NH 3]·[Zn 3(HPO 3) 4] ( 2) were hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic system, space group P2 1 /c with cell parameters: a=9.9875(13) Å, b=10.3402(11) Å, c=14.4373(16) Å, β=102.093°, and Z=4. It possesses a layered architecture and organic template molecules located between the inorganic layers forming hydrogen bonds. The inorganic layers, which consist of four-, eight-membered rings, are constructed of alternating ZnO 4 tetrahedra and [HPO 3 2−] pseudo-pyramid by sharing vertices. Each four-membered ring is capped by a [HPO 3 2−] pseudo-pyramid. The 1,2-diammonium-propane template molecules are located above the eight-membered rings. Compound 2 crystallizes in the orthorhombic system, space group Pbcn with cell parameters: a=8.8754(14) Å, b=16.667(3) Å, c=13.864(2) Å, and Z=4. It is built up from three-dimensional Zn/P/O frameworks. Corner-linked ZnO 4 tetrahedra and [HPO 3 2−] pseudo-pyramids form four-, six-, eight-membered rings and 12-membered ring channels. 1,6-diaminohexane cations are located in the 12-membered ring channel systems. Two compounds were characterized by IR spectroscopy, and differential thermal and thermogravimetric analyses.