Hydrothermal synthesis and characterization of organically templated zincophosphites with two- and three-dimensional structures, [CH3CH(NH3)CH2NH3] center dot [Zn-2(HPO3)(3)] center dot H2O and [H3N(CH2)(6)NH3] center dot [Zn-3(HPO3)(4)]

摘要

Two organically templated zincophosphites, [CH3CH(NH3)CHNH3] . [Zn-2(HPO3)(3)] .H2O (1) and [H3N(CH2)(6)NH3]. [Zn-3(HPO3)(4)] (2) were hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Compound I crystallizes in the monoclinic system, space group P2(1/c) with cell parameters: a = 9.9875(13) Angstrom, b = 10.3402(11) Angstrom, c = 14.4373(16) Angstrom, beta = 102.093degrees, and Z = 4. It possesses a layered architecture and organic template molecules located between the inorganic layers forming hydroszen bonds. The inorganic layers, which consist of four-, eight-membered rings, are constructed of alternating ZnO4 tetrahedra and [HPO32-] pseudo-pyramid by sharing vertices. Each four-membered ring is capped by a 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) Angstrom, b = 16.667(3) Angstrom, c 13.864(2) Angstrom, and Z = 4. It is [HPO32-] built up from three-dimensional Zn/P/O frameworks. Corner-linked ZnO4 tetrahedra and pseudo-pyramids form four-, six-, eiaht-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. (C) 2003 Elsevier Science (USA). All rights reserved. [References: 26]