Two porous coordination polymers containing helix-based metal-organic nanotubes based on trigonal N-donor ligand.

Two isostructural 3D porous metal-organic frameworks (MOFs), namely [Co 2 (Htpim) 2 (odpa)]·8H 2 O (1) and [Ni 2 (Htpim) 2 (odpa)]·8H 2 O (2) (Htpim = 2,4,5-tri(4-pyridyl)-imidazole, odpa = 4,4′-oxydiphthalate), were prepared and characterized by elemental analyses, single crystal X-ray diffraction, powder X-ray diffraction, IR spectra and thermal analyses. The 3D architectures of compounds 1 and 2 are built from 1D metal-organic nanotubes (MONTs) which connect with each other by bridging ligands, and every 1D MONT is generated by linking the vertexes of helical chain with metal-organic fragments. In addition, the magnetic properties of 1 and 2 have also been studied. [ABSTRACT FROM AUTHOR]