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Filling vacancies in a Prussian blue analogue using mechanochemical post-synthetic modification

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Abstract

Mechanochemical grinding of polycrystalline powders of the Prussian blue analogue (PBA) Mn[Co(CN)6]2/31/3·xH2O and K3Co(CN)6 consumes the latter and chemically modifies the former. A combination of inductively-coupled plasma and X-ray powder diffraction measurements suggests the hexacyanometallate vacancy fraction in this modified PBA is reduced by approximately one third under the specific conditions we explore. We infer the mechanochemically-driven incorporation of [Co(CN)6]3− ions onto the initially-vacant sites, coupled with intercalation of charge-balancing K+ ions within the PBA framework cavities. Our results offer a new methodology for the synthesis of low-vacancy PBAs.

Graphical abstract: Filling vacancies in a Prussian blue analogue using mechanochemical post-synthetic modification

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Article information


Submitted
22 Apr 2020
Accepted
04 Jun 2020
First published
04 Jun 2020

This article is Open Access

Chem. Commun., 2020, Advance Article
Article type
Communication

Filling vacancies in a Prussian blue analogue using mechanochemical post-synthetic modification

J. Cattermull, S. Wheeler, K. Hurlbutt, M. Pasta and A. L. Goodwin, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC02922J

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