title: Sonochemical syntheses of a new fibrous-like nano-scale manganese(II) coordination supramolecular compound; precursor for the fabrication of octahedral-like Mn3O4 nano-structure.
abstract: Nanoparticles of a new three-dimensional Mn(II) coordination supramolecular compound, [Mn(L)2(H2O)2] (1), (L(-)=1H-1,2,4-triazole-3-carboxylate), have been synthesized by a sonochemical process and characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), FT-IR spectroscopy and elemental analyses. Structural determination of compound 1 reveals the Mn(II) ion is six coordinated, bonded to two nitrogen atoms, two oxygen atoms from the L(-) ligand and two water molecules. The thermal stability of compound 1 both its bulk and nano-size has been studied by thermal gravimetric (TG) and differential thermal analyses (DTA) and compared each other. Concentration of initial reagents effects on size and morphology of nano-structured compound 1, have been studied and shows that low concentrations of initial reagents decreased particles size and also leaded to fibrous-like nanostructures morphology. Mn3O4 nano-structure with an octahedral-like morphology were simply synthesized by solid-state transformation of compound 1 at 650 °C.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Islamic Republic of Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Safarifard
authors.forename: Ali
authors.initials: A
authors.lastname: Morsali
keywords: Manganese oxide; Nano-structure; Sonochemical; Supramolecule; Thermal decomposition