Invariant nature of substituted element in metal-hexacyanoferrate

Hideharu Niwa, Wataru Kobayashi, Takayuki Shibata, Hiroaki Nitani, Yutaka Moritomo

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The chemical substitution of a transition metal (M) is an effective method to improve the functionality of materials. In order to design the highly functional materials, we first have to know the local structure and electronic state around the substituted element. Here, we systematically investigated the local structure and electronic state of the host (M h) and guest (M g) transition metals in metal-hexacyanoferrate (M-HCF), Na x (M h, M g)[Fe(CN)6] y (1.40 < x < 1.60 and 0.85 < y < 0.90), by means of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) analyses. The EXAFS and XANES analyses revealed that the local structure and electronic state around M g are essentially the same as those in the pure compound, i.e, M g-HCF. Such an invariant nature of M g in M-HCF is in sharp contrast with that in layered oxide, in which the M g valence changes so that local M g-O distance (d M-O g) approaches the M h-O distance (d M-O h).

Original languageEnglish
Article number13225
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • General

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