Synthesis and characterizations of a layered antimony (III) phosphonate:: [NH2CH2CH2NH2][Sb2(O3PCH(OH)CO2)2]

In the presence of ethylenediamine template agents, a layered antimony (III) phosphonate, [NH2CH2CH2NH2][Sb-2{O3P-CH(OH)CO2}(2)] (1) has been synthesized by hydrothermal reaction at 140 degrees C and characterized by single-crystal X-ray diffraction as well as by infrared spectroscopy, elemental and thermogravimetric analysis. The structure of compound 1 comprises [SbO4E] trigonal bipyr-amids (E is the lone pair electrons occupying an axial position) and [O3PC] tetrahedra connected by [O3PCH(OH)CO2](3-) to form a 2D layered structure with a one-dimensional channel system, and the ethylenediamine template agent is located inside the channels. (c) 2007 Elsevier B.V. All rights reserved.