Cyclic voltammetry of platinum and glassy carbon electrodes in an acidic mixture containing 1.0 mM PdCl2 and 2.0 mM Na2IrCl6 yields a film of a 0.75 μm film is about 0.2 at.%. The surface concentration of palladium drops to below the detection limit of X-ray photoelectron spectroscopy wh experi...
We have examined quantum yields for chlorine production from solar photolysis of acidic chloride solutions containing the hexachloroiridate (IV) complex, IrCl62−. Previous investigators found good quantum yields in the middle UV (Φ(Cl2) = 0.128 at 254 nm), but the yield was found to decrease in...
Kinetic parameters are reported for hexachloroiridate (IV) oxidation of t-butyl-catechol (4-t-butyl-benzene-1,2-diol), hydroquinone (benzene-1,4-diol) and its 2-t-butyl derivative in binary aqueous mixtures containing methanol, ethanol, t-butyl alcohol, acetone, dimethyl sulfoxide, or dimethylfo...
Kinetics of the oxidation of methanol, ethanol and isopropanol by hexachloroiridate(IV) have been studied spectrophotometrically in sodium acetate-acetic acid buffer. Each reaction is first order with respect to iridium(IV) but the order with respect to alcohol is less than unity. Hydrogen ion i...
Kinetic data for the oxidation of d-glucose by hexachloroiridate(IV) and tetrachloroaurate(III) are reported. The reactions have been studied spectrophotometrically over a wide range of experimental conditions. The activation parameters have been calculated and mechanisms are suggested.
Spectrophotometric techniques has been applied for studying the kinetics and mechanistics between Ag+ and [IrCl6]2− reaction in aqueous acidic solutions at a constant ionic strength of 1.0 moldm−3. The naked eyes observation showed that the brownish color of [IrCl6]2− solution was rapidly vanish...
In this paper we investigated reactions of urazole and phthalazine with N-(aryl)-2,2,2-trifluoroacetimidoyl chloride derivatives. Results showed that when imidoyl chloride derivative has a fluorine atom at ortho position (3a–c), in two steps under a SNi mechanism and then SNAr reaction mechanis...
Direct oxidative functionalization of CH bonds is an ongoing chemical challenge. Here we report results of the comparative tests of Ag(II)SO4 reactivity towards 24 selected fluoro- and/or trifluoromethyl-substituted aromatic hydrocarbons with ionization potentials (IP) varying in the 8.15–10.72...
In this work investigations of the hyperfine structure of 66 spectral lines of the holmium atom were performed with the method of laser induced fluorescence in a hollow cathode discharge lamp. Altogether 43 odd-parity levels, involved as the upper levels in the transitions studied, were investig...
Extramammary Paget’s disease (EMPD) is a rare intraepithelial neoplasm arising in apocrine rich area of the skin. Surgery is the standard treatment but relapse is common. The postoperative skin defects, penile reconstruction, functional effects and old age are also challenges for curing disease...
First-principles calculations of the structural, magnetic and elastic properties of Holmium pnictides compounds HoX (X = As, Sb, and P) in the rock-salt structure, as a function of pressure, have been performed using the Density Functional Theory (DFT). We have used two full-potential methods: f...
This work is devoted to investigations of unclassified spectral lines in atomic holmium, aiming at identification of new electronic levels and determination of their hyperfine structure. Altogether 113 unclassified lines were investigated with the method of laser induced fluorescence in a hollow...
We demonstrate and compare nanoseconds pulse induced by a Holmium oxide PVA film (HOPF, 50 μm thick) and a Holmium-doped fibre (HDF, 8 cm long) saturable absorber (SA) in a Thulium doped-fibre laser (TDFL) cavity. The HOPF SA produced a nanoseconds pulse operating at 1960 nm wavelength, with a ...
BackgroundThe existence of saccharide-holmium complexes, containing mono or polysaccharide molecules, is an attractive hypothesis toward a radiation therapy (RT) with beta-emitters targeting high glucose metabolic human sites. To exam such hypothesis, the aim of this study was to investigate the...
SummaryLaparoscopic biliary tract exploration is a minimally invasive surgery for biliary calculi. Most of the stones could be removed by conventional surgical methods including lithotomy forceps and choledochoscopy, but for the incarceration stones of the bile duct, it is technically challengin...
The asymmetric synthesis of new tetrahydropyrrolo[2,3-b]indole 19 and tetrahydropyrano[2,3-b]indole 20 rings, substituted in position C-3a and C-4a with a hydroxy- and an amino functionalized chain, respectively, was performed starting from the racemic spiro[cyclohexane-1,3′-indoline]-2′,4-dio...
The pentacyanoferrate(II) complexes of 1,4-thioxane, 1,4-dithiane and 1,3-dithiane have been prepared in ethanol-water solution and their sodium salts isolated. Microanalysis, UV-visible, infrared and Mo¨ssbauer spectroscopies, were used to characterize the complexes. Each complex has an absorp...
Substituted pentacyanoferrate(II) complexes Na3[Fe(CN)5L]·xH2O have been obtained for di-sec-butylamine, tri-n-amylamine, pyrazole, pyrazine, pyrrole, and 2-,3- and 4-cyanopyridine. Microanalysis, UV-visible, infrared, and Mössbauer spectroscopies, TGA-DTG and XRD were used to characterize the ...
The synthesis and characterization of a new supermolecular porphyrin obtained by the coordination of four pentacyanoferrate(II) groups to the pyridyl N-atoms of meso-(3-pyridyl)porphyrin are reported. The redox potential and the 57Fe Mössbauer isomeric shift indicated that the pyridylporphyrin b...
The assembly of a surfactant-based rotaxane by adding the labile aquopentacyanoferrate(II) ion to the previously formed pseudorotaxane between the surfactant 11-(isonicotinoyloxy)-N,N,N-triethyl-1-undecanaminium bromide and β-cyclodextrin was investigated by 1H NMR and kinetic measurements. NMR...
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