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

Abstract

Two novel organic–inorganic hybrid compounds based on organoamines and polyoxovanadates formulated as (H 2dien) 4[H 10V 18O 42(PO 4)](PO 4)·2H 2O ( 1) (dien=diethylenetriamine) and (Him) 8[HV 18O 42(PO 4)] ( 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: C 16H 74N 12O 52V 18P 2, Monoclinic, space group C2 /c, a=23.9593(4) Å, b=13.0098(2) Å, c=20.1703(4) Å, β=105.566(3)°, V=6056.6(19) Å 3, Z=4; for compound 2, C 24H 41N 16O 46V 18P, Tetragonal, space group I4 /mmm, a=13.5154(8) Å, b=13.5154(8) Å, c=19.1136 Å, β=90°, V=3491.4(3) Å 3, Z=2. Compound 1 consists of protonated diens together with polyoxovanadates [H 10V 18O 42(PO 4)] 5−. Compound 2 is composed of protonated ims and polyoxovanadates [HV 18O 42(PO 4)] 8−. There are hydrogen-bonding interactions between polyoxovanadates and different organoamines in 1 and 2. Polyoxovanadates are linked through H 2dien 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.