Journal Article

FZJ-2018-07005

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Polyoxopalladates as Prototype Molecular Hydrogen Uptake Systems and Novel In situ Hydrogen Detectors on the Nanoscale

Schmitz-Antoniak, C. (Corresponding author)FZJ* ; Izarova, N. V.FZJ* ; Svechkina, N. ; Smekhova, A.FZJ* ; Stuckart, M.FZJ* ; Schmitz, D. ; Kögerler, P.FZJ*

2019
Wiley-VCH Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/21498  doi:10.1002/ejic.201800972

Abstract: Dodecapalladium(II) oxide‐based molecular nanocubes encapsulating Fe3+ (3d5) or Co2+ (3d7) ions display facile hydrogen uptake with concurrent pronounced magnetization changes that suggests use as molecular hydrogen detection materials. Electronic and magnetic properties were investigated element‐specifically by X‐ray absorption spectroscopy and its associated magnetic circular and linear dichroisms. Hydrogenation reduces the Fe3+ (3d5) ions to a 3d6 state while the Co2+ 3d7 configuration remains largely unaffected. However, in both cases, drastic changes of the crystal field and the magnetic properties were observed and quantified. The spin magnetic moments in the as‐prepared state were obtained to be similar to the ones expected for free ions and are reduced significantly by about 30–40 % for both Fe and Co central ions upon loading with hydrogen. In addition, re‐oxidation and hydrogenation in a second cycle were monitored and the sensitivity to hydrogen and oxygen exposure as a function of the peripheral capping groups is discussed.

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Contributing Institute(s):

1. Elektronische Eigenschaften (PGI-6)

Research Program(s):

1. 522 - Controlling Spin-Based Phenomena (POF3-522) (POF3-522)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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