One-Dimensional Non-coplanar Nitrogen Chains in Manganese Tetranitride under High Pressure
Yuchen Zhang1, Kexin Zhang1, Jingkun Yu2
1State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
The Journal of Physical Chemistry Letters
|April 12, 2024
Summary
Researchers discovered a new manganese polynitride, MnN4, a hard and high energy density material. This discovery offers insights into polymeric nitrogen structures under high pressure.
Area of Science:
- Materials Science
- Solid State Chemistry
- High-Pressure Physics
Background:
- Transition metal nitrides are promising for applications requiring incompressible and high energy density materials.
- Polymeric nitrogen structures significantly influence the properties of these materials, leading to complex bonding and coordination.
Purpose of the Study:
- To report the discovery of a new manganese polynitride, MnN4.
- To investigate the structural and energetic properties of MnN4 under high-pressure conditions.
Main Methods:
- High-pressure and high-temperature synthesis using a diamond anvil cell.
- Experimental characterization including pressure-volume data analysis.
- Computational calculations to determine material properties.
Main Results:
- A novel manganese polynitride, MnN4, with bifacial trans-cis [N4] chains was synthesized.
- MnN4 exhibits P-1 symmetry and stabilizes between 56-127 GPa.
- Calculations indicate MnN4 is a potential hard material (255 GPa) with high energy density (2.97 kJ/g).
- Asymmetric interactions lead to sp2-3 hybridization and distortions in the [N4] chains.
Conclusions:
- Discovery of a new polynitride material, MnN4.
- Contribution to the understanding of manganese polynitride behavior under high pressure.
- New insights into the formation mechanisms of polymeric nitrogen structures.
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