Metal-organic framework thin films composed of free-standing acicular nanorods exhibiting reversible electrochromism

Chung Wei Kung, Timothy Chiaan Wang, Joseph E. Mondloch, David Fairen-Jimenez, Daniel M. Gardner, Wojciech Bury, Jordan Matthew Klingsporn, Jonathan C. Barnes, Richard Van Duyne, J. Fraser Stoddart, Michael R. Wasielewski, Omar K. Farha*, Joseph T. Hupp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

149 Scopus citations

Abstract

A uniform and crack-free metal-organic framework (MOF) thin film composed of free-standing acicular nanorods was grown on a transparent conducting glass substrate. The MOF thin film exhibits electrochromic switching between yellow and deep blue by means of a one-electron redox reaction at its pyrene-based linkers. The rigid MOF stabilizes the radical cations of the pyrene linkers at positive applied potential, resulting in the reversible color change of the MOF film. The regular and uniform channels of the MOF allow ions to migrate through the entire film. The MOF thin film thus exhibits a remarkable color change and rapid switching rate.

Original languageEnglish (US)
Pages (from-to)5012-5017
Number of pages6
JournalChemistry of Materials
Volume25
Issue number24
DOIs
StatePublished - Dec 23 2013

Keywords

  • electrochromism
  • metal-organic frameworks
  • one-dimensional nanorods
  • pyrene

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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