High‐Pressure Synthesis of Metal–Inorganic Frameworks Hf4N20⋅N2, WN8⋅N2, and Os5N28⋅3 N2 with Polymeric Nitrogen Linkers
Abstract
Polynitrides are intrinsically thermodynamically unstable at ambient conditions and require peculiar synthetic approaches. Now, a one‐step synthesis of metal–inorganic frameworks Hf4N20⋅N2, WN8⋅N2, and Os5N28⋅3 N2 via direct reactions between elements in a diamond anvil cell at pressures exceeding 100 GPa is reported. The porous frameworks (Hf4N20, WN8, and Os5N28) are built from transition‐metal atoms linked either by polymeric polydiazenediyl (polyacetylene‐like) nitrogen chains or through dinitrogen units. Triply bound dinitrogen molecules occupy channels of these frameworks. Owing to conjugated polydiazenediyl chains, these compounds exhibit metallic properties. The high‐pressure reaction between Hf and N2 also leads to a non‐centrosymmetric polynitride Hf2N11 that features double‐helix catena‐poly[tetraz‐1‐ene‐1,4‐diyl] nitrogen chains [−N−N−N=N−]∞.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 08, 2020
- Source ID
- 10.1002/ange.202002487
Entities
People
- Alena V. Ponomareva
- Alexander Goncharov
- Elena Bykova
- Ferenc Tasnádi
- Hanns‐peter Liermann
- Igor A. Abrikosov
- Johan Tidholm
- Leonid Dubrovinsky
- Maxim Bykov
- Michael Hanfland
- Mohammad Mahmood
- Natalia Dubrovinskaia
- Pavel Sedmak
- Saiana Khandarkhaeva
- Stella Chariton
- Timofey Fedotenko
- Vitali Prakapenka
Organizations
- European Synchrotron Radiation Facility
- Federal Ministry of Research, Technology and Space
- German Research Foundation
- Howard University
- Knut and Alice Wallenberg Foundation
- Linköping University
- National University of Science and Technology
- Russian Science Foundation
- Swedish Research Council
- United States Army Research Laboratory
- University of Bayreuth
- University of Chicago