Quantum-chemical calculations at DFT B3LYP and ab initio MP2, CCSD, and CCSD(T) levels have been performed on various binary fluorides of platinum up to formal oxidation state +VIII, to evaluate the stability of these species. The calculations indicate clearly that elimination of F2 from PtF8 is...

The reactions of the third transition (5d) series metal hexafluorides PtF6, IrF6, OsF6, ReF6 and WF6 with CO are studied in the Lewis superacid SbF5, the Brønsted superacid HF and the conjugate Brønsted–Lewis superacid HF–SbF5, in order to evaluate their potential as reactants in reductive car...

Electronic transition spectrum of platinum monofluoride (PtF) between 431 and 560 nm has been investigated using the technique of laser vaporization/reaction with free jet expansion and laser induced fluorescence spectroscopy. Eight vibrational bands had been observed but only six of them were a...

Reactions of platinum metal hexafluoride negative ions were studied by Knudsen cell mass spectrometry. The electron affinities were measured for OsF6(5.93±0.28 eV), IrF6 (6.50±0.38 eV), PtF6(7.00±0.35 eV), and RuF6 (6.47±0.31 eV).The relevant data on electron affinities of platinum metal hex...

Knudsen-cell mass spectrometry was used for the investigation of the gas-phase equilibrium: PtF4 + F2 = PtF6, generated within an effusion cell by heating a (Pt + TbF4) mixture. By use of the third law the following quantities at T = 298.15 K have been determined: ΔrHmo = −(152 ± 12) kJ·mol−1...

The effusion method has been applied to the study of equilibria of molecular negative ions. The heats of the charge-exchange reactions between platinum tetra- and hexa- fluorides and their negative ions have been determined and the electron affinity of PtF6 calculated as 8.0 ± 0.3 e V.

Modes of activation of sulfur hexafluoride for the synthesis of sulfur pentafluorides are considered. We report an S‒F activation of sulfur hexafluoride with TEMPO lithium and subsequent reaction with an alkene affording an aliphatic SF5-containing product, which is isolated in low yield and ful...

Terbium and rare earths recovery from fluorescent powders of exhausted lamps by acid leaching with hydrochloric acid was the objective of this study. In order to investigate the factors affecting leaching a series of experiments was performed in according to a full factorial plan with four varia...

Two novel lanthanide−sulfate compounds, [Ln2(SO4)3(H2O)8] (Ln = Tb (1) and Dy (2)), have been synthesized under hydrothermal reactions. X-ray crystal structure analyses reveal that 1 and 2 are isomorphous and crystallize in monoclinic C2/c pace group, showing a layered structure. The layers bear...

Six new 4-acyl pyrazolone derivatives and their complexes with the terbium nitrates were synthesized and characterized by mass spectra, elemental analysis, EDTA titrimetric analysis, UV spectra, infrared spectra, molar conductivity and thermal analysis. The results showed that pyrazolone derivat...

Triboluminescence of Се2(SO4)3·8H2O and Tb2(SO4)3·8H2O crystals has been studied. For the first time spectral evidence for a contribution of light-emitting products OH⁎ (283 and 290 nm maxima, 1–0 transition; 308.4 and 309.6 nm, 0–0 transition) and excited oxygen atom O⁎ (777 nm, 3P5P—3S5...

The effect of substrate material (Si, SiO2, Al2O3) on structural, optical and electrical properties of terbium doped ZnO films (Tb-ZnO) has been investigated by the X-ray diffraction, Raman scattering, atomic force microscopy, photoluminescence and infrared reflection methods. All films consist ...

In this paper, we report the preparation of terbium(Tb+3) complex 2 (Diaqua-tris(nitrato)-(2(pyridine-2,6-diyl(methyleneoxy))benzaldehyde)terbium(III)) by the mechanochemical route in good yields, which demonstrated to be superior to conventional method in terms of simplicity, reaction time, cos...

The triboluminescence of Tb2(SO4)3·8H2O crystals in which water was replaced by heavy water has been studied for the first time. An increase in triboluminescence intensity of Tb2(SO4)3·nD2O (n≈8) crystals corresponds to the change in quantum yield of Tb3+ ions. The replacement of the crystall...

The germination of Clostridium difficile spores is an important stage of the C. difficile life cycle. In other endospore-forming bacteria, the composition of the medium in which the spores are generated influences the abundance of germination-specific proteins, thereby influencing the sensitivit...

The sonication of terbium sulfate suspensions in benzene, toluene, and p-xylene induces intense UV luminescence (260–320 nm). The luminescence bands coincide with the fluorescence spectra of these aromatic hydrocarbons, but it is not observed in their sonoluminescence spectra. Furthermore, the ...

Sonotriboluminescence of terbium sulfate suspensions in aromatic hydrocarbons (benzene, toluene, or p-xylene) containing 1.5·10−2 mol L−1 of p-terphenyl in atmospheric air was investigated. An intense luminescence band of p-terphenyl was detected in the UV region (λmax = 350 nm). The luminesce...

Liquid–liquid extraction and separation of samarium(III) were carried out by using 0.025 mol dm−3 2-octylaminopyridine(2-OAP) in xylene at 298 K. The extraction behavior of samarium was studied as a function of pH, weak acid concentration, extractant concentration, diluent, and equilibration ti...

In the present research, a brown marine macroalga (Turbinaria conoides) was employed as a novel biosorbent for the sequestration of samarium ions from aqueous solutions. The influence of solution pH, initial Sm(III) concentration and contact time on Sm(III) removal were investigated. The biosorb...

A prolonged crystallization of samarium sulfite solution at 70°C yields a disulfite sulfate hydrate precipitate Sm2(SO3)2SO4 · nH2O, where n is ≈ 2.5. The solid phase was characterized by X-ray powder diffraction, thermal analysis (TG, DTG and DTA) and IR spectroscopy. TG measurements reveale...