The compound forms monomeric units as a result of unusual unidentate coordination of 4,4-bipy ligands. <...> The thermal stability of the compound is studied by thermal analyses. <...> Furthermore, the complex is luminescent with emission maxima at 329 nm in the methanol solvent. <...> Different sizes of zinc(II) oxide nanoparticles are prepared by calcination of the [Zn(4,4-bipy)2(H2O)4](ClO4)24(4,4-bipy) compound at two different temperatures. <...> These nanostructures are characterized by X-ray powder diffraction and scanning electron microscopy. <...> INTRODUCTION Zinc always occurs as a divalent cation and it is the second most abundant transition metal following iron [ 1—4]. <...> In recent years, a wide variety of networks have been designed using the inorganic coordination polymers that provide very interesting information about supramolecular systems [ 5—7]. <...> The Zn(II) ion is particularly appropriate for the construction of coordination polymers and networks [ 8—23]. <...> In most of these complexes, the 4,4-bipyridine ligands are coordinated to the zinc(II) ion as bridging, act as bridging ligands, and form one-, two- or three-dimensional coordi© Dolatyari L., Seddigi P., Ramazani A., Amiri M.G., Morsali A., 2013 2Department of Chemistry, Payame Noor University, 19395-4697 Tehran, Islamic Republic of Iran 3Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P O Box 14155-4838 Tehran, Islamic . 517 – 522 518 L. DOLATYARI, P. SEDDIGI, A. RAMAZANI ET AL. nation polymers. <...> We describe here on the preparation, thermal properties and crystal structure of [Zn(4,4-bipy)2(H2O)4](ClO4)24(4,4-bipy) in the room temperature. <...> Different sizes of zinc(II) oxide nanoparticles were prepared from calcinations of compound [Zn(4,4-bipy)2(H2O)4](ClO4)24(4,4bipy) at two different temperatures. <...> Melting points were measured on an Electrothermal 9100 apparatus and were uncorrected. <...> The thermal behavior was measured with a PL-STA 1500 apparatus. 1H and 13C NMR spectra were measured with a BRUKER DRX-500 AVANCE spectrometer at 500 MHz and all chemical shifts are <...>