Real and Hypothetical Intermediate-Valence AgII /AgIII and AgII /AgI Fluoride Systems as Potential Superconductors.
@article{Grochala2001RealAH,
title={Real and Hypothetical Intermediate-Valence AgII /AgIII and AgII /AgI Fluoride Systems as Potential Superconductors.},
author={Wojciech Grochala and Roald Hoffmann},
journal={Angewandte Chemie},
year={2001},
volume={40 15},
pages={
2742-2781
}
}With the aim of gauging their potential as conducting or superconducting materials, we examine the crystal structures and magnetic properties of the roughly one hundred binary, ternary, and quaternary AgII and AgIII fluorides in the solid state reported up to date. The AgII cation appears in these species usually in a distorted octahedral environment, either in an [AgF]+ infinite chain or as [AgF2 ] sheets. Sometimes one finds discrete square-planar [AgF4 ]2- ions. The AgIII cation occurs…
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107 Citations
Real and Hypothetical Intermediate-Valence Ag(II)/Ag(III) and Ag(II)/Ag(I) Fluoride Systems as Potential Superconductors.
- Materials Science, PhysicsAngewandte Chemie
- 2001
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Calculations using the hybrid HSE06 functional of magnetic superexchange constants, J, for a series of low-dimensional CuII and AgII binary and ternary systems with fluoride and oxide ligands find that [AgF][BF4 ], a quasi-1D system with linear infinite [AgII F+ ] chains, is predicted to exhibit an unprecedented strong AFM superezchange via one atom (F).
Isovalent AgIII /AgIII , AgII /AgII , Mixed-Valent AgII /AgIII , and Corrolato-Based Mixed-Valency in β,β'-Linked [Bis{corrolato-silver}]n Complexes.
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The synthesis of a new β,β'-linked bis{corrolato-silver(III)} complex and its characterization in five different redox states are reported and open new avenues for bis- Corrolato ligands and for mixed-valency in disilver compounds.
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- Materials ScienceDalton transactions
- 2015
Thorough inspection of thermal ellipsoids of the fluorine atoms closest to Ag centres reveals their unusual shape, indicating that silver atoms must in fact have different local coordination spheres; this is not immediately apparent from the crystal structure due to static disorder of fluoride atoms.
On possible existence of pseudobinary mixed valence fluorides of Ag(I) / Ag(II): a DFT study
- Materials ScienceJournal of molecular modeling
- 2011
DFT calculations performed within local density approximation disclose conceivable existence of two novel mixed–valence Ag(I)/Ag(II) fluorides, Ag2F3 and Ag3F4, which are at the verge of thermodynamic stability and a handful of exothermic reactions have been proposed which could yield these as yet unknown compounds.
High-Pressure Behavior of Silver Fluorides up to 40 GPa.
- Chemistry, Materials ScienceInorganic chemistry
- 2017
Using X-ray diffraction and guided by theoretical calculations, crystal structures of high-pressure polymorphs of AgF2 are elucidated and the transition from ambient pressure to an unprecedented nanotubular structure takes place via an intermediate orthorhombic layered structure, which lacks an inversion center.
Canted Antiferromagnetism in Two-Dimensional Silver(II) Bis[pentafluoridooxidotungstate(VI)].
- Materials ScienceInorganic chemistry
- 2017
By slow reaction between colorless AgIW2O2F9 and elemental F2 in liquid anhydrous HF, violet platelike single crystals of Ag(WOF5)2 were grown and the vibrational spectra show more bands than expected for regular C4v symmetry.
Pressure-induced transformations of AgIIF2—towards an ‘infinite layer’ d9 material
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The enthalpy of seven polymorphs of AgF2 has been scrutinized up to 50 GPa using density functional theory (DFT) calculations. We show that α-AgIIF2 (Pbca, with its puckered-sheet structure and an…
Magnetic behaviour of layered Ag(II) fluorides
- Physics, Materials ScienceNature materials
- 2006
A comprehensive study of structure and magnetism in the layered Ag(II) fluoride Cs2AgF4 is presented, using magnetic susceptometry, inelastic neutron scattering techniques and both X-ray and neutron powder diffraction, and suggests that orbital ordering may be the origin of the ferromagnetism observed in this material.
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