What is it about?
The combination of time-resolved X-ray fluorescence (XRF) and position-dependent X-ray absorption near-edge structure (XANES) spectroscopies shed light on a complicated and poorly-understood but technologically-interesting system: gel-state dependent, discrete brown bands of Mn−Fe-based Prussian blue analogues (PBAs) formed in water-glass gels by reaction−diffusion processes.
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Why is it important?
Recently, the Mn−Fe-based Prussian blue analogues (PBAs), which are well-known functional materials, have been reported to form Liesegang bands. The Liesegang banding of PBAs, for instance, has a potential to be used for simple self-assembling of micro-magnetic/electrode arrays of Mn−Fe-based PBAs. To realize such technological applications, a detailed understanding of reaction-diffusion processes of the PBAs formed in gels is required. The chemical states of Mn−Fe-based PBAs in gels are complicated and currently poorly understood because such PBAs are polymeric and do not have well-defined structures. Furthermore, PBAs can intercalate a broad range of ions, making their structures more complicated. Thus, the PBAs states in gels are also of interest in analytical and inorganic chemistry.
Perspectives
The combination of time-resolved XRF and position-dependent XANES provided several interesting findings concerning the gel-state dependencies of brown patterns formed by RD processes of Mn−Fe-based PBAs in water-glass gels. This approach is expected to be useful for future investigations of the RD processes of PBAs.
Dr Hisashi Hayashi
Japan Women's University
Read the Original
This page is a summary of: Gel-State Dependencies of Brown Patterns of Mn–Fe-Based Prussian Blue Analogues Studied by Combined X-ray Spectroscopies, Bulletin of the Chemical Society of Japan, July 2017, The Chemical Society of Japan,
DOI: 10.1246/bcsj.20170080.
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