A metal-organic framework-based material for electrochemical sensing of carbon dioxide

Jeremiah J. Gassensmith; Jeung Yoon Kim; James M. Holcroft; Omar K. Farha; J. Fraser Stoddart; Joseph T. Hupp; Nak Cheon Jeong

doi:10.1021/ja5006465

A metal-organic framework-based material for electrochemical sensing of carbon dioxide

Jeremiah J. Gassensmith, Jeung Yoon Kim, James M. Holcroft, Omar K. Farha, J. Fraser Stoddart, Joseph T. Hupp, Nak Cheon Jeong

Northwestern University

Research output: Contribution to journal › Article › peer-review

153 Citations (Scopus)

Abstract

The free primary hydroxyl groups in the metal-organic framework of CDMOF-2, an extended cubic structure containing units of six Î-cyclodextrin tori linked together in cube-like fashion by rubidium ions, has been shown to react with gaseous CO₂ to form alkyl carbonate functions. The dynamic covalent carbon-oxygen bond, associated with this chemisorption process, releases CO₂ at low activation energies. As a result of this dynamic covalent chemistry going on inside a metal-organic framework, CO₂ can be detected selectively in the atmosphere by electrochemical impedance spectroscopy. The as-synthesized CDMOF-2 which exhibits high proton conductivity in pore-filling methanolic media, displays a ∼550-fold decrease in its ionic conductivity on binding CO₂. This fundamental property has been exploited to create a sensor capable of measuring CO₂ concentrations quantitatively even in the presence of ambient oxygen.

Original language	English
Pages (from-to)	8277-8282
Number of pages	6
Journal	Journal of the American Chemical Society
Volume	136
Issue number	23
DOIs	https://doi.org/10.1021/ja5006465
Publication status	Published - Jun 11 2014

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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A metal-organic framework-based material for electrochemical sensing of carbon dioxide. / Gassensmith, Jeremiah J.; Kim, Jeung Yoon; Holcroft, James M.; Farha, Omar K.; Fraser Stoddart, J.; Hupp, Joseph T.; Jeong, Nak Cheon.

In: Journal of the American Chemical Society, Vol. 136, No. 23, 11.06.2014, p. 8277-8282.

Research output: Contribution to journal › Article › peer-review

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AU - Hupp, Joseph T.

AU - Jeong, Nak Cheon

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