PbO–Bi2O3–As2O3 glasses mixed with different concentrations of CuO (ranging from 0 to 0.6 mol%) were prepared. Dielectric properties (viz., dielectric constant ε′, loss tan δ and a.c. conductivity σac) over a wide range of frequency and temperature as a function of concentration of CuO hav...
Two new bismuth arsenites with two different structural types, namely, Bi2O(AsO3)Cl (1), Bi8O6(AsO3)2(AsO4)2 (2), have been synthesized by the solid-state reactions. Compound 1 exhibits novel 2D bismuth arsenite layers with Bi4O4 rings capped by oxide anions, which are further interconnected by ...
The Raman spectrum of atelestite Bi2O(OH)(AsO4), a hydroxy-arsenate mineral containing bismuth, has been studied in terms of spectra-structure relations. The studied spectrum is compared with the Raman spectrum of atelestite downloaded from the RRUFF database. The sharp intense band at 834 cm−1 ...
Sulfur-containing conjugated polymer was synthesized by the polymerization of phenyl propargyl sulfide by transition metal catalysts such as PdCl2, RuCl3, (NBD)PdCl2, WCl6, and MoCl5. The polymerization proceeded well in homogeneous manner to give a moderate yield of polymer. The chemical struct...
As a common environmental pollutant, the sulfide anion (S2−) is toxic to the human body. We report here the simple preparation of a selective fluorogenic glycoprobe–metal complex for the rapid analysis of S2− in full aqueous solution and real water samples. The probe was synthesized by “clicki...
The molecular structures of pyridine complexes with boron trifluoride, boron trichloride and boron tribromide have been determined from gas electron-diffraction data. The molecular parameters of the boron trifluoride complex are rg(NB) = 1.669(7) Å, rg(BF) = 1.366(2) Å, ∠FBF = 113.3(4)°, r...
The IR and Raman spectra of arylselenium tribromides X = C6H4SeBr3 where X = H, Br, Cl, CH3 are reported. It is suggested that the solids are possibly tetramers in the solid state formed by donor-acceptor interaction between units RSeBr2+ and Br−. Each selenium atom is in a highly symmetrical or...
Reactions of [Pt2(μ-S)2(PPh3)4] with the diarylthallium(III) bromides Ar2TlBr [Ar = Ph and p-ClC6H4] in methanol gave good yields of the thallium(III) adducts [Pt2(μ-S)2(PPh3)4TlAr2]+, isolated as their BPh4- salts. The corresponding selenide complex [Pt2(μ-Se)2(PPh3)4TlPh2]BPh4 was similarly...
The 71Ga NMR spectra of solutions of gallium tribromide in different aromatic solvents have been recorded, and dependences of chemical shift on concentration, temperature and solvent observed. Such effects are absent in the corresponding solutions of Me3Ga. The 71 Ga chemical shift changes are c...
A divanadium(V) complex, [V2O3(o-van-val)2] (o-van-val = Schiff base derived from o-vanillin and l-valine), has been synthesized and structurally characterized. The crystal structure shows that both of the vanadium centers in the complex have a distorted octahedral coordination environment compo...
The synthesis and characterization of the resin Amberlite XAD-2 functionalized with Nitroso R salt and its application in an online system for preconcentration of cobalt and determination by flame atomic absorption spectrometry (FAAS) is proposed. Cobalt(II) ions are sorbed in a minicolumn packe...
Cobalt hexagonal nanoplatelets and cobalt nanoflakes were produced by electrodeposition onto aluminium from cobalt sulphate solutions. The dependence of the nanostructure morphology on cobalt ion concentration and potential was investigated under potentiostatic and pulsed-electrodeposition. Unde...
A novel series of un-metallized and metal complexes formazan dye (12–17) have been synthesized in an aqueous system, without using Buffers, with cost-effectiveness and improved fastness properties. The synthetic methodology involved the synthesis of 4-(2-(((2-hydroxy-5-nitrophenyl) diazenyl) (p...
Corrosion has been acknowledged as one of the biggest opponents in applications and industries such as in motorized industries, oil and gas industries, manufacturing and chemical plants, electric power generation plants and concrete structuresUsing the electrodeposition process, Cobalt-Nickel-Ir...
At the PWR Paks diluted low-level radioactive waste water (LLW) contains the long-lived 60Co isotope in EDTA complex form, which has no simple separation procedure. In this research nanofiltration(NF) was studied for selective removal of the cobalt(III) EDTA complex from a drain waste water mode...
Reactivity of three boron cluster anions [B10H10]2−, [B10Cl10]2− and [B12H12]2− with cobalt(II) chloride and 1,10-phenanthroline was studied in acetonitrile and DMF, in the presence of an oxidizing agent CeIV and without it. It was found that the nature of the boron cluster, solvent used, reagen...
Kinetic investigations on the reduction of CoIII-complex by a biologically active antioxidant molecule, ascorbic acid in a buffer medium of pH 9.0 have been performed using spectroscopic techniques. The reaction has been carried out in presence of a protein, bovine serum albumin (BSA), n-cetyltr...
A new version of DSPE in a narrow-bore tube followed by HPLC-DAD was proposed for the analysis of Ni2+, Cd2+, Co2+, and Pb2+ cations. 2-Propanol is mixed with C18 sorbent and used for dispersing the sorbent into solution containing the cations oxinate complexes. The sorbent passes through the so...
An analysis of the normal vibrations of dichloroborane has been made, according to the conventional Wilson's method of symmetry coordinates. The molecule was assumed to be planar and belonging to C2υ symmetry. Data from previous works have been used and the calculated spectrum fitted to th...
1,2-aminoazides are easily prepared from 1,2-amino alcohols. Catalytic hydrogenation in the presence of palladium on charcoal or reductive alkylation with dichloroboranes afford with good yields unsymmetrically substituted vicinal diamines.
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