Two new hydrogen bond-supported supramolecular compounds assembly from polyoxovanadate and organoamines

Two novel organic-inorganic hybrid compounds based on organoamines and polyoxovanadates formulated as (H(2)dien)(4)[H10V18O42 (PO4)]PO4). 2H(2)O (1) (dien = diethylenetriamine) and (Him)(8)[HV18O42(PO4)] (2) (im = imidazole) have been prepared under hydrothermal conditions by using different starting materials, and characterized by elemental analyses, IR, ESR, XPS, TGA and single-crystal X-ray diffraction analyses. Crystal data for compound 1: C16H74N12O52V18P2, Monoclinic, space group C2/c, a = 23.9593(4)angstrom, b = 13.0098(2)angstrom, c = 20.1703(4)angstrom, beta = 105.566(3)degrees, V = 6056.6(19)angstrom(3,) Z = 4; for compound 2, C24H41N16O46V18P, Tetragonal, space group 14/mmm, a = 13.5154(8),angstrom, b = 13.5154(8)angstrom, c = 19.1136 angstrom, beta = 90 degrees, V = 3491.4(3) A3, Z = 2. Compound I consists of protonated diens together with polyoxovanadates, [H10V18O42(PO4)](5-). Compound 2 is composed of protonated ims and polyoxovanadates [HV18O42(PO4)](8-). There are hydrogen-bonding interactions between polyoxovanadates and different organoamines in I and 2. Polyoxovanadates are linked through H(2)dien into a three-dimensional network via hydrogen bonds in 1, while polyoxovanadates are linked by Him into a two-dimensional layer network via hydrogen bonds in 2. The crystal packing patterns of the two compounds reveal various supramolecular frameworks. (c) 2007 Elsevier Inc. All rights reserved.