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Structural Influence of Lone Pairs in GeP2N4, a Germanium(II) Nitridophosphate |
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| Authors: | M?Sc Sebastian J Ambach Cody Somers Dr Tristan de Boer Dr Lucien Eisenburger Prof?Dr Alexander Moewes Prof?Dr Wolfgang Schnick |
| Institution: | 1. Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstraße 5–13, 81377 Munich, Germany
Contribution: Data curation (lead), Formal analysis (lead), ?Investigation (lead), Validation (equal), Visualization (lead), Writing - original draft (lead), Writing - review & editing (equal);2. Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan, S7?N 5E2 Canada Contribution: Formal analysis (supporting), ?Investigation (supporting), Writing - review & editing (supporting);3. Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstraße 5–13, 81377 Munich, Germany;4. Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan, S7?N 5E2 Canada |
| Abstract: | Owing to their widespread properties, nitridophosphates are of high interest in current research. Explorative high-pressure high-temperature investigations yielded various compounds with stoichiometry MP2N4 (M=Be, Ca, Sr, Ba, Mn, Cd), which are discussed as ultra-hard or luminescent materials, when doped with Eu2+. Herein, we report the first germanium nitridophosphate, GeP2N4, synthesized from Ge3N4 and P3N5 at 6 GPa and 800 °C. The structure was determined by single-crystal X-ray diffraction and further characterized by energy-dispersive X-ray spectroscopy, density functional theory calculations, IR and NMR spectroscopy. The highly condensed network of PN4-tetrahedra shows a strong structural divergence to other MP2N4 compounds, which is attributed to the stereochemical influence of the lone pair of Ge2+. Thus, the formal exchange of alkaline earth cations with Ge2+ may open access to various compounds with literature-known stoichiometry, however, new structures and properties. |
| Keywords: | Germanium High-Pressure Chemistry Nitrides Nitridophosphates Solid-State Structures |