期刊
INORGANIC CHEMISTRY
卷 58, 期 21, 页码 14863-14870出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b02552
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资金
- Leverhulme Trust [RPG-2014-366]
- FWO [G035619N]
- Block Allocation Group award Oxford Solid State Chemistry BAG to probe composition-structure-property relationships in solids [EE13284]
Reaction of the n = 1 Ruddlesden-Popper oxide LaSr3CoRuO8 with CaH2 yields the oxyhydride phase LaSr3CoRuO4H4 via a topochemical anion exchange. Close inspection of the X-ray and neutron powder diffraction data in combination with HAADF-STEM images reveals that the nanoparticles of SrO are exsolved from the system during the reaction, with the change in cation stoichiometry accommodated by the inclusion of n > 1 (Co/Ru)(n)On+1H2n perovskite layers into the Ruddlesden-Popper stacking sequence. This novel pseudotopochemical process offers a new route for the formation of n > 1 Ruddlesden-Popper structured materials. Magnetization data are consistent with a LaSr3Co+Ru2+O4H4 (Co+, d(8), S = 1; Ru2+, d(6), S = 0) oxidation/spin state combination. Neutron diffraction and mu+SR data show no evidence for long-range magnetic order down to 2 K, suggesting the diamagnetic Ru2+ centers impede the Co-Co magnetic-exchange interactions.
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