Publication
Title
Disproportionation of in the topochemically reduced oxide LaSrCoRuO₅
Author
Abstract
Complex transition-metal oxides exhibit a wide variety of chemical and physical properties which are a strong function the local electronic states of the transition-metal centres, as determined by a combination of metal oxidation state and local coordination environment. Topochemical reduction of the double perovskite oxide, LaSrCoRuO6, using Zr, yields LaSrCoRuO5. This reduced phase contains an ordered array of apex-linked square-based pyramidal Ru3+O5, square-planar Co1+O4 and octahedral Co3+O6 units, consistent with the coordination-geometry driven disproportionation of Co2+. Coordination-geometry driven disproportionation of d(7) transition-metal cations (e.g. Rh2+, Pd3+, Pt3+) is common in complex oxides containing 4d and 5d metals. However, the weak ligand field experienced by a 3d transition-metal such as cobalt leads to the expectation that d(7+) Co2+ should be stable to disproportionation in oxide environments, so the presence of Co1+O4 and Co3+O6 units in LaSrCoRuO5 is surprising. Low-temperature measurements indicate LaSrCoRuO5 adopts a ferromagnetically ordered state below 120 K due to couplings between S=(1)/(2) Ru3+ and S=1 Co1+.
Language
English
Source (journal)
Angewandte Chemie: international edition in English. - Weinheim
Publication
Weinheim : Wiley-v c h verlag gmbh , 2024
ISSN
1433-7851
0570-0833
DOI
10.1002/ANIE.202313067
Volume/pages
63 :6 (2024) , p. 1-5
Article Reference
e202313067
ISI
001136579700001
Pubmed ID
38085493
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
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Publications with a UAntwerp address
External links
Web of Science
Record
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Creation 01.02.2024
Last edited 08.12.2024
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