Strontium Vanadium Oxide–Hydrides: “Square‐Planar” Two‐Electron Phases |
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| Authors: | Dr. Fabio Denis Romero Alice Leach Dr. Johannes S. Möller Francesca Foronda Prof. Stephen J. Blundell Prof. Michael A. Hayward |
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| Affiliation: | 1. Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR (UK);2. Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU (UK) |
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| Abstract: | A series of strontium vanadium oxide–hydride phases prepared by utilizing a low‐temperature synthesis strategy in which oxide ions in Srn+1VnO3n+1 (n=∞, 1, 2) phases are topochemically replaced by hydride ions to form SrVO2H, Sr2VO3H, and Sr3V2O5H2, respectively. These new phases contain sheets or chains of apex‐linked V3+O4 squares stacked with SrH layers/chains, such that the n=∞ member, SrVO2H, can be considered to be analogous to “infinite‐layer” phases, such as Sr1?xCaxCuO2 (the parent phase of the high‐Tc cuprate superconductors), but with a d2 electron count. All three oxide–hydride phases exhibit strong antiferromagnetic coupling, with SrVO2H exhibiting an antiferromagnetic ordering temperature, TN>300 K. The strong antiferromagnetic couplings are surprising given they appear to arise from π‐type magnetic exchange. |
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| Keywords: | oxide– hydrides solid‐state reactions solid‐state structures topochemistry |
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