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    Öğe
    Sonochemical synthesis and characterization of nanostructured copper(I) supramolecular compound as a precursor for the fabrication of pure-phase copper oxide nanoparticles
    (Springer, 2015) Ranjbar, Maryam; Nabitabar, Masoomeh; Celik, Omer; Yousefi, Mostafa
    In this investigation, nanoparticles and single crystals of a Cu(I) supramolecular compound, [Cu(dmph)-A mu-I](2) (1), [dmph = 2,9-dimethyl-1,10-phenanthroline (neocuproine)], have been synthesized by the reaction of copper(II) acetate, KI and neocuproine as ligand in methanol using sonochemical and heat-gradient methods, respectively. The nanostructure of 1 was characterized by scanning electron microscopy, X-ray powder diffraction, FT-IR spectroscopy and elemental analyses, and the structure of compound 1 was determined by single-crystal X-ray diffraction. The crystal structure of compound 1 has been found to be a binuclear coordination compound. The Cu atoms have slightly distorted tetrahedral geometry with two iodine and two nitrogen coordinated atoms which are trans configuration to each other. Pure phase CuO nanoparticles were simply obtained by calcination of nanosized compound 1 at 700 A degrees C under air atmosphere. This study demonstrates that the supramolecular compounds may be suitable precursors for the simple one-pot preparation of nanoscale metal oxide materials with different and interesting morphologies.
  • [ X ]
    Öğe
    Synthesis of Lead(II) Minoxidil Coordination Polymer: A New Precursor for Lead(II) Oxide and Lead(II) Hydroxyl Bromide
    (Springer, 2012) Ranjbar, Maryam; Celik, Omer; Najafi, S. Heydar Mahmoudi; Sheshmani, Shabnam; Mobarakeh, Neda Akbari
    A new lead(II) coordination polymer, [PbBr2(C9H15N5O)](n) (1), where C9H15N5O is (2,4-diamino-6-piperidine-1-yl) pyrimidine N-oxide (minoxidil) is synthesized and characterized. Polymer 1 is synthesized in methanol by sonochemical and hydrothermal methods from lead(II) acetate, KBr and the minoxidil ligand. The crystal structure of [PbBr2(C9H15N5O)](n) indicates a syndiotactic coordination polymer. The Pb(II) atom lies on a mirror plane; the mirror plane is perpendicular to the pyrimidine ring bisecting the piperidine ring. N-H center dot center dot center dot O intramolecular and C-H center dot center dot center dot Br, N-H center dot center dot center dot N strong intermolecular interactions were observed. Micro-rods of PbO and nano-plates of PbOHBr were prepared by thermal decomposition of the nano-structured [PbBr2(C9H15N5O)](n) as a precursor. Characterization of the products was carried out using X-ray crystallography, elemental analysis, FTIR spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis and thermal analysis. The sonochemical method resulted in a significant reduction of reaction time, reaction temperature and particle sizes of the products.