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A Metal-Organic Framework-Based Material for Electrochemical Sensing of Carbon Dioxide
- A Metal-Organic Framework-Based Material for Electrochemical Sensing of Carbon Dioxide
- Gassensmith, JJ[Gassensmith, Jeremiah J.]; Kim, JY[Kim, Jeung Yoon]; Holcroft, JM[Holcroft, James M.]; Farha, OK[Farha, Omar K.]; Stoddart, JF[Stoddart, J. Fraser]; Hupp, JT[Hupp, Joseph T.]; Jeong, NC[Jeong, Nak Cheon]
- DGIST Authors
- Kim, JY[Kim, Jeung Yoon]; Jeong, NC[Jeong, Nak Cheon]
- Issue Date
- Journal of the American Chemical Society, 136(23), 8277-8282
- Article Type
- Activation Energy; Atmosphere; Atmospheric Chemistry; Carbon-Oxygen Bonds; Carbon Dioxide; Chemistry; Conductance; Crystalline Materials; Cubic Structure; Dynamic Covalent Chemistry; Electro-Chemical Impedance Spectroscopy (EIS); Electrochemical Sensing; Electrochemistry; Fundamental Properties; Gamma Cyclodextrin; Hydroxyl Group; Hydroxyl Groups; Low-Activation Energy; Metal Organic Framework; Oxygen; Proton; Rubidium Ion; Sensor
- 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. © 2014 American Chemical Society.
- AMER CHEMICAL SOC
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