Abdulaziz I. Al-Wassil

Effects of precursor on the morphology and size of ZrO2 nanoparticles, synthesized by sol-gel method in non-aqueous medium

Pure zirconium oxide (ZrO2) nanoparticles with diameters 10-25 nm were synthesized from ZrOCl2.8H2O and Zr(SO4)2.H2O with benzyl alcohol as non-aqueous solvent medium using sol-gel method. Sodium lauryl sulfate was added as surfactants to control the particle size. The synthesized ZrO2 nanoparticles have a mixture of tetragonal and monoclinic structure. The XRD showed the purity of obtained ZrO2 nanoparticles with tetragonal and monoclinic phase and the crystallite size for ZrOCl2.8H2O precursor was estimated to be 18.1 nm and that from Zr(SO4)2.H2O was 9.7 nm. The transmission electron microscopy and scanning electron microscopic studies also shows different sizes of nanoparticles and different morphology depending on the precursor used for the synthesis of ZrO2 nanoparticles

PREPARATION AND CHARACTERIZATION OF NEW In(III), Re(III), AND Re(V) COMPLEXES WITH THENOYLTRIFLUOROACETONE AND SOME BIDENTATE HETEROCYCLIC LIGANDS

ABSTRACT New In(III), Re(III) and Re(V) complexes with the thenoyltrifluoroacetone ligand (HTTA) of the general formulae [In-(TTA)(H2O)4]SO4, [Re(TTA)n(H2O)x]Cl3-n and [ReO(TTA)n-(H2O)x]Cl3-n (where n and x refer to the number of [TTA]− moieties and H2O molecules, respectively) have been prepared and characterized by spectroscopy, thermogravimetry, elemental analyses and X-ray diffraction. The charge densities on the ligand atoms were calculated via CNDO-SCF calculations. The newly prepared complexes. [In(TTA)(H2O)4]SO2 and [ReO(TTA)(H2O)2]CL2 were employed as precursors for the synthesis of the mixed-ligand complexes [In(TTA)(HOCTA)2], [In(TTA)(TZT)2] and [ReO(TTA)(HOTCA)]Cl using R(-)-2-oxothiazolidine 4-carboxylicacid (H2OTCA) and 1H-1,2,4-triazole-3-thiol (H2TZT) as ligands. The synthesized mixed-ligand complexes were characterized by the conventional physical and chemical methods of analysis applied earlier for the characterization of the precursors. The investigated complexes are soluble in water, ethanol and acetonitrile, insoluble in non-polar solvents and could be of potential use for clinical studies. The antibacterial activity of the investigated complexes has been tested and evaluated.

1H and 13C NMR study of hydantoin complexes with antimony, cadmium and mercuric chlorides

Abstract Hydantoin complexes with antimony(V), cadmium(II), and mercuric chlorides were synthesized. Antimony and cadmium complexes were found to involve solvent (MeOH) in their formation while this behaviour was not observed with mercury complexes. The complexes were studied by 1 H and 13 C NMR spectroscopy and the chemical shifts are reported.

SYNTHESIS AND CHARACTERIZATION OF NEW In(III), Re(III), Re(V), Pd(II), AND Rh(III) COMPLEXES OF TOLUENE-3,4-DITHIOL

New In(III), Re(III), Re(V), Pd(II) and Rh(III) Complexes of Toluene-3,4-Dithiol with 2:1 ligand : metal ratio have been prepared and characterized in the solid state. Microanalytical data of the investigated complexes correspond to the general formula [M(TDT)x (H2O)m] where M refers to the metal ion, x, m are the numbers of the coordinated TDT= and H2O respectively. The solid complexes have been characterized using conventional chemical and physical methods of analysis.

Crystal structure of tetrakisdiphenylammonium hexadecachlorotetrabismuthate(III)

Abstract[(C6H5)2NH2]4+[Bi4Cl16]4− crystallizes in the triclinic space group

Radiation-induced synthesis of ZrO2 nanoparticles by thermal decomposition of zirconium acetylacetonate

P\bar 1

Radiation-induced degradation of solid fluorene

witha=11.835(2),b=12.393(2),c=12.625(3)Å, α=108.37(3), β=108.69(3), γ=96.00(3)° andDc=2.135 g cm−3 forZ=1. The [Bi4Cl16]4− anion is a centrosymmetric cluster of four distorted edge-sharing BiCl6 octahedra. The ranges of the Bi−Cl bonds are 2.484(4)–2.606(3)Å for Bi−Cl(terminal), 2.691(3)–2.956(4)Å for Bi-Cl(µ2), and 2.960(3)–3.120(4)Å for Bi-Cl(µ3). The cations and anions are held in place by weak hydrogen bonds.

Chemical effects induced by γ-irradiation in solid and in aqueous methanol solutions of 4-iodophenol

Abstract In3+-thenoyltrifluoroacetone In3+(TTA)3 Complex has been prepared by reaction of In(SO4)3. 2H2O and thenoyltrifluoroacetone ligand in presence of acetate buffer. The complex has been investigated by conventional chemical and physical methods of analysis. Micro analytical data of the investigated complex showed the formula of the complex to be In(TTA)3 formula. Trials to prepare mixed ligand complexes starting with In(TTA)3 using neutral co-ligand were un successful. The complex is soluble in ethanol and could be of potential use in clinical studies.