Post-Synthetic Cyano-Ferrate(II) Functionalization of the Metal–Organic Framework, NU-1000

14 December 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Starting with ferrocyanide ions in acidic aqueous solution, cyano-ferrate(II) species are post-synthetically grafted to the nodes of a mesoporous zirconium-based MOF, NU-1000. As indicated by single-crystal X-ray crystallography, grafting occurs by substitution of cyanide ligands by node-based hydroxo and oxo ligands, rather than by substitution of node aqua ligands by cyanide ligands as bridges between Fe(II) and Zr(IV). The installed moieties yield a broad absorption band that is tentatively ascribed to iron-to-zirconium charge-transfer. Consistent with Fe(III/II) redox activity, a modest fraction of the installed iron complexes are directly electrochemically addressable.

Keywords

Ferrocyanide
Post-synthetic modification
Redox hopping
Zirconium-based MOF

Supplementary materials

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Description
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Supporting Information
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Additional data and discussion
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CheckCIF file
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CheckCIF file of the crystallographic data
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.cif file
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.cif file of FeCN@NU-1000
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