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[en] Reports of studies carried out on the inorganic coordination chemistry of vanadium are reviewed. 167 refs.; 25 figs
Journal
[en] A selective and quantitative extraction procedure for vanadium(IV), as a adipate complex, with Adogen-464[methyltri(C8-C10)alkylammonium chloride, mol.wt. 431] dissolved in chloroform is described. The method was optimized from the study of the effects of different parameters on the extraction efficiency and was subsequently applied to the determi-nation of vanadium in several complex matrices. (author). 19 refs.; 1 fig.; 2 tabs
Journal
[en] The blue vanadium(IV) compound VO(HPO4)·O.5H2O has been identified as precursor to the maleic anhydride catalyst (VO)2P2O7. Structural similarities between the two compounds suggest a topotactic transformation from hydrogen phosphate to pyrophosphate as the mechanism of catalyst activation. In both compounds, measurement of the magnetic susceptibility as a function of temperature reveals that the major bulk fraction of the vanadium spins are antiferromagnetically coupled, while a variable minor fraction of the defect spins are nearly isolated from the other spins. Two new phases of VOPO4 are formed upon oxidation of VO(HPO4)·O.5H2O. 19 refs.; 5 figs.; 3 tabs
Source
Delmon, B.; Grange, P.; Poncelet, G. (Louvain Univ., Louvain-la-Neuve (Belgium). Groupe de Physico-Chimie Minerale et de Catalyse); Jacobs, P.A. (Louvain Univ., Heverlee (Belgium). Centrum voor Oppervlaktescheikunde en Colloidale Scheikunde) (eds.); Studies in Surface Science and Catalysis; v. 31; 886 p; ISBN 0-444-42796-1; 
; 1987; p. 181-190; Elsevier; Amsterdam (Netherlands); 4. International symposium on the scientific bases for the preparation of heterogeneous catalysts; Louvain-la-Neuve (Belgium); 1-4 Sep 1986; Contains discussion.
; 1987; p. 181-190; Elsevier; Amsterdam (Netherlands); 4. International symposium on the scientific bases for the preparation of heterogeneous catalysts; Louvain-la-Neuve (Belgium); 1-4 Sep 1986; Contains discussion.
[en] We systematically search for the stable structures of two-dimensional (2D) V-V binary compounds with honeycomb-like structure by using the first-principles calculation. We identify 26 stable structures out of 54 2D V-V compounds based on various assessments of stabilities: total energy, thermodynamics, and mechanics. Among them, 12 2D V-V compounds are previously unrecognized structures. For each class V-V isomer, the most stable structures are found to be β-AsP, β-SbAs, α-BiAs, α-BiSb, α 2-SbP, and α 2-BiP. For all isomers of the AsP, they are always stable, and hence PAs monolayer is most likely to be prepared experimentally. All the stable structures are semiconductors with bandgaps ranging from 0.06 eV to 2.52 eV at the Heyd–Scuseria–Ernzerhof level. Therefore, they are potential materials for versatile semiconductor devices. Our findings provide a new clue to facilitate the design of 2D materials for potential applications. (paper)
Journal
Materials Research Express (Online); ISSN 2053-1591; ; v. 5(3); [9 p.]
; v. 5(3); [9 p.]
No abstract available
Journal
Zhurnal Fizicheskoj Khimii; ISSN 0044-4537; ; v. 57(2); p. 443-444
; v. 57(2); p. 443-444
No abstract available
Journal
Fizika Tverdogo Tela; ISSN 0367-3294; ; v. 24(5); p. 1486-1488
; v. 24(5); p. 1486-1488
[en] Influence of copper (2) ions on interaction of vanadium with 2,4-dithiobiuret in weakly acidic media is studied. Preliminary reduction of copper up to the univalent one which later on reduces vanadium (5) is the most probable under given conditions
Journal
Ukrainskij Khimicheskij Zhurnal; ISSN 0041-6045; ; v. 48(3); p. 247-250
; v. 48(3); p. 247-250
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