Post-Synthetic Cyano-ferrate(II) Functionalization of a Metal-Organic Framework, NU-1000

Chung Wei Kung*, Ken Ichi Otake, Riki J. Drout, Subhadip Goswami, Omar K. Farha, Joseph T. Hupp*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)4936-4942
Number of pages7
JournalLangmuir
Volume39
Issue number14
DOIs
StatePublished - Apr 11 2023

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award Number DE-FG02-87ER13808. C.-W.K. acknowledges support from the Postdoctoral Research Abroad Program (105-2917-I-564-046) sponsored by the Ministry of Science and Technology (Taiwan). This work made use of the J. B. Cohen X-ray Diffraction Facility supported by the MRSEC program of the National Science Foundation (NSF) (DMR-1121262) at the Materials Research Center of Northwestern University and the EPIC and KECK II facilities (NUANCE Center, Northwestern University) supported by the MRSEC program (NSF DMR-1121262), the International Institute for Nanotechnology (IIN), and the State of Illinois through the IIN. This work also made use of the IMSERC at Northwestern University, which has received support from the NSF (CHE-1048773 and DMR-0521267), the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205), the State of Illinois, and IIN. We also thank Pi-Yun Lin in the Core Facility Center of National Cheng Kung University for NMR measurements and the National Science and Technology Council (NSTC) of Taiwan (110-2221-E-006-017-MY3) for support.

ASJC Scopus subject areas

  • Condensed Matter Physics
  • General Materials Science
  • Spectroscopy
  • Surfaces and Interfaces
  • Electrochemistry

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