LaSr3 NiRuO4 H4 : A 4d Transition-Metal Oxide-Hydride Containing Metal Hydride Sheets.
Angew Chem Int Ed Engl
; 57(18): 5025-5028, 2018 04 23.
Article
em En
| MEDLINE
| ID: mdl-29520952
ABSTRACT
The synthesis of the first 4d transition metal oxide-hydride, LaSr3 NiRuO4 H4 , is prepared via topochemical anion exchange. Neutron diffraction data show that the hydride ions occupy the equatorial anion sites in the host lattice and as a result the Ru and Ni cations are located in a plane containing only hydride ligands, a unique structural feature with obvious parallels to the CuO2 sheets present in the superconducting cuprates. DFT calculations confirm the presence of S=1/2 Ni+ and S=0, Ru2+ centers, but neutron diffraction and µSR data show no evidence for long-range magnetic order between the Ni centers down to 1.8â
K. The observed weak inter-cation magnetic coupling can be attributed to poor overlap between Niâ
3dz2 and Hâ
1s in the super-exchange pathways.
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MEDLINE
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En
Ano de publicação:
2018
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Article