Journal
CHEMISTRY OF MATERIALS
Volume 25, Issue 24, Pages 5012-5017Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm403726v
Keywords
electrochromism; metal-organic frameworks; one-dimensional nanorods; pyrene
Funding
- U.S. Dept. of Energy, Office of Science, Basic Energy Sciences [DE-FG02-87ER13808]
- Northwestern University
- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, DOE [DE-FG02-99ER14999]
- Foundation for Polish Science through the Kolumb Program
- DOE [DE-AC05-060R23100]
- Graduate Students Study Abroad Program
- National Science Council (Taiwan)
- Royal Society (U.K.)
- Department of Defense through the National Defense Science & Engineering Graduate (NDSEG) Fellowship Program
- NDSEG Fellowship from the Department of Defense [32 CFR 168a]
- Ryan Fellowship from the NU International Institute for Nanotechnology (IIN)
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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.
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