.АРХИВ СТАТЕЙ

We report the optical and structural properties of ZnO and MgO nanoparticles. The samples are obtained by a simple method using a new template of hcxamcthylcne tctramine. The optical properties of the samples are studied by UV-visible spectroscopy. Their crystal structure and morphology arc studied by XRD and scanning electron microscopy. The absorption spectra of MgO and ZnO show that the optical band gaps are 4.27 eV and 3.02 eV, respectively. In this investigation the photocatalytic degradation of indigo carmine (1С) in water is studied. The effects of some parameters such as pH, amount of catalyst, initial concentration of dye, arc examined.

О предстоящей конференции по техническим аспектам информационной безопасности - ZeroNights 2011.

Two new zinc(II) complexes [ZnL(N3)]?BF4 (1) and [ZnBrL]?BF4 (2), derived from the tetra­dentate Schiff base ligand N,N?-bis(1-pyridin-2-yl-ethylidene)propane-1,3-diamine (L), are prepared and characterized by physicochemical methods and single crystal X-ray crystallography. The crystal of (1) is triclinic: space group P-1, a = 8.593(1) ?, b = 8.752(1) ?, c = 13.393(2) ?, a = 97.153(1)°, b = 93.046(1)°, g = 91.577(1)°, V = 997.4(2) ?3, Z = 2. The crystal of (2) is triclinic: space group P-1, a = 8.351(1) ?, b = 8.956(1) ?, c = 13.139(2) ?, a = 92.716(1)°, b = 94.241(2)°, g = 95.016(1)°, V = 974.8(2) ?3, Z = 2. The geometries of the penta-coordinated zinc atoms in both complexes are intermediate between the square pyramid and the trigonal bipyramid having the Addison parameters of 0.39 and 0.47 respectively. The syntheses of the complexes show distinct preference for the anions in the order Br– >N3-> CH3COO–.