Xi:Irritant;7440-62-2Relevant articles and documents
Reduction of vanadium from alkaline solutions
Shirinov,Gasanly,Ganbarov
, p. 1230 - 1233 (2009)
Effect of the potential sweep rate and temperature on the reduction kinetics of vanadate ions from alkaline solutions was studied. The nature of polarization in separate regions of the cathodic process was determined.
Balduin, H.
, (1957)
Extreme Sensitivity of a Topochemical Reaction to Cation Substitution: SrVO2H versus SrV1- xTixO1.5H1.5
Amano Patino, Midori,Zeng, Dihao,Blundell, Stephen J.,McGrady, John E.,Hayward, Michael A.
, p. 2890 - 2898 (2018)
The anion-ordered oxide-hydride SrVO2H is an antiferromagnetic insulator due to strong correlations between vanadium d electrons. In an attempt to hole-dope SrVO2H into a metallic state, a strategy of first preparing SrV1-xTixO3 phases and then converting them to the corresponding SrV1-xTixO2H phases via reaction with CaH2 was followed. This revealed that the solid solution between SrVO3 and SrTiO3 is only stable at high temperature. In addition, reactions between SrV0.95Ti0.05O3 and CaH2 were observed to yield SrV0.95Ti0.05O1.5H1.5 not SrV0.95Ti0.05O2H. This dramatic change in reactivity for a very modest change in initial chemical composition is attributed to an electronic destabilization of SrVO2H on titanium substitution. Density functional theory calculations indicate that the presence of an anion-ordered, tetragonal SrMO2H phase is uniquely associated with a d2 electron count and that titanium substitution leads to an electronic destabilization of SrV1-xTixO2H phases, which, ultimately, drives further reaction of SrV1-xTixO2H to SrV1-xTixO1.5H1.5. The observed sensitivity of the reaction products to the chemical composition of initial phases highlights some of the difficulties associated with electronically doping metastable materials prepared by topochemical reactions.
Jantsch, G.,Zemek, F.
, (1953)
Some novel tetradentate Schiff base complexes VO(IV) and Cu(II) involving fluorinated heterocyclic β-diketones and polymethylene diamines of varying chain length : Synthesis, spectral, coordination and thermal aspects
Modi,Thaker
, p. 567 - 577 (2008)
The present article describes the synthesis, spectral, coordination and thermal aspects of N,N'-polymethylene bis(1-phenyl-3-methyl-4- trifluoroacetylimino-2-pyrazoline-5-ol)oxovanadium(IV) or copper(II) Schiff base complexes with alkyl backbones ranging
McCarley, R. E.,Roddy, J. W.
, p. 293 - 296 (1960)
VCl4 revisited: ESR and photolysis in solid hydrogen, neon, and argon; Formation of VH4
Graham, John T.,Li, Li,Weltner Jr.
, p. 9302 - 9306 (2000)
Electron-spin-resonance (ESR) spectra of the VCl4 molecule were observed at low concentrations at 2-4 K in solid H2, D2, Ne, and Ar. As previously observed in other matrixes, the spectra of an axial molecule were obtained in H2, D2, and Ne, indicative of a Jahn-Teller (JT) distorted molecule with compressed tetrahedral D2d symmetry. However, in argon, a composite of an axial and a near-isotropic spectrum was observed, and annealing yielded only the isotropic at 4 K. This surprising result is discussed relative to JT dynamic vibronic interaction. Photolysis of VCl4 in H2 (and D2) matrixes yielded a new spectrum assigned to VH4 (or VD4), indicating that the tetrahydride is also a JT-distorted 2E ground-state molecule, in accord with earlier ab initio theory.
