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Azizov O.,Institute of General and Inorganic Chemistry | Kadirov Z.,Tashkent Chemical Technological Institute | Azizov T.,Institute of General and Inorganic Chemistry | Tolipov S.,Institute of Biorganic Chemistry | Ibragimov B.,Institute of Biorganic Chemistry
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In title compound, [Ca(C7H5O2) 2(C7H6O2)(H2O)] n, the eight-fold-coordinated CaII ion is bonded to four carboxylate O atoms from two benzoate ions, an O atom from benzoic acid and a water O atom. One of the carboxylate groups bridges adjacent Ca2+ ions, forming a polymeric ribbon structure parallel to [010]. In the crystal, the benzoate anions and water molecule interact by way of inter- and intramolecular O-H⋯O hydrogen bonds.

Kadirova Z.,Tashkent Chemical Technological Institute | Tolipov S.,Institute of Bioorganic Chemistry | Fedorovskiy O.,RAS Nesmeyanov Institute of Organoelement Compounds | Bakhtiyar I.,Institute of Bioorganic Chemistry | Parpiev N.,National University of Uzbekistan
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title compound, C 14H 14F 3NO 4, the 3,3,3-trifluoro-pyruvate fragment has a syn configuration and is noncoplanar with the indole plane [dihedral angle = 84.87 (5)°]. In the crystal, mol-ecules form inversion-related dimers via pairs of inter-molecular O - H⋯O hydrogen bonds. These dimers are connected by inter-molecular N - H⋯O=C(CF3) hydrogen bonds to form a two-dimensional network structure. © Kadirova et al. 2011.

Kadirova Z.C.,Tashkent Chemical Technological Institute | Chepulsky S.A.,National University of Uzbekistan | Parpiev N.A.,National University of Uzbekistan | Talipov S.A.,Institute of Biorganic Chemistry | Sharipov K.T.,Tashkent Chemical Technological Institute
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

In the title compound, (C13H15N2O) 2[ZnCl4], also known as di(harmalinium) tetra-chloridozincate, the ZnII atom is in a distorted tetrahedral coordination of the chlorido ligands. In the cation, the meth-oxy and methyl groups are both coplanar with with rings to which they are attached [maximum deviations of 0.232 (4) and 0.259 (4) Å, respectively]. In the crystal, the alkaloid cations and metal complex anions inter-act by way of N - H⋯Cl hydrogen bonds involving each Cl atom, resulting in a network structure.

Adinaev K.A.,Tashkent Chemical Technological Institute | Ismatov A.A.,Tashkent Chemical Technological Institute
Russian Journal of Applied Chemistry | Year: 2010

The information on obtaining colored transparent glasses of lead silicate composition is given in the article. Cr2O3, Mn 2O3, Fe2O3, Ni2O 3, Y2O3, Ce2O3, Nd 2O3, and Er2O3 are used as colorants. Structural features of obtained glasses are investigated by methods of infrared spectroscopy and electron microscopy. © 2010 Pleiades Publishing, Ltd.

Kadirova Z.C.,Academy of Sciences of Uzbekistan | Kadirova Z.C.,Tokyo Institute of Technology | Hojamberdiev M.,Tokyo Institute of Technology | Katsumata K.-I.,Tokyo Institute of Technology | And 5 more authors.
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering | Year: 2014

The spherical granular activated carbon-carbon composites (GAC-Fe) with different iron oxide contents (Fe mass% = 0.6-10) were prepared by a pore volume impregnation method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2-adsorption results confirm the presence of amorphous iron oxide, pyrolytic carbon, and graphitized globular carbon nanoparticles covered with amorphous carbon in the CAG-Fe. The rate of photodegradation of methylene blue (MB) in aqueous solution under UV light in the presence of oxalic acid correlates with porosity of the prepared materials. The total MB removal includes the combination of adsorption and photodegradation without the addition of H2O2. The results of total organic carbon (TOC) analysis reveal that the decolorization of MB in aqueous solution containing oxalic acid corresponds to the decomposition of organic compounds to CO 2 and H2O. © 2014 Copyright Taylor & Francis Group, LLC.

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