title: Sonochemical synthesis of a new nano-sized cerium(III) supramolecular compound; Precursor for nanoceria.
abstract: Using a sonochemical method, nanoparticles of a new Ce(III) supramolecular compound, (NAMH(+))2[Ce4(pydc)6(pydcH)2(H2O)8]·8H2O (1), (H2pydc=2,6-pyridinedicarboxylic acid, NAM=nicotinamide), have been synthesized. Compound 1 was characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRPD), FT-IR spectroscopy and elemental analyses, and its structure was determined by X-ray crystallography. It has been revealed that its structure consists of tetra-nuclear building units that extend to a 3D supramolecular network via non-covalent interactions mainly hydrogen bonding. The thermal stability of complex 1 both for its crystals and nanostructures has been studied by the thermal gravimetric (TG) method and compared with each other. The role of ultrasound irradiation power and the concentration of initial reactants on the size and morphology of the nano-structured complex 1, has been investigated. Ceria nanoparticles were obtained upon the calcination of complex 1 at 800°C under atmospheric air. Furthermore, the fluorescent properties of complex 1 at room temperature were studied.
authors.affiliation: School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
authors.forename: Parviz
authors.initials: P
authors.lastname: Gohari Derakhshandeh
authors.affiliation: School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran. Electronic address: janet_soleimannejad@khayam.ut.ac.ir.
authors.forename: Janet
authors.initials: J
authors.lastname: Soleimannejad
keywords: Cerium(III); Crystal structure; Nanoceria; Sonochemical method; Supramolecular compound