2013 Fiscal Year Final Research Report
Gas sorption into the nanochannel water cage
| Project/Area Number |
24651127
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | Tohoku University |
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Principal Investigator |
MATSUI Hiroshi 東北大学, 理学(系)研究科(研究院), 准教授 (30275292)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | ガス吸蔵 / ナノ多孔質 / 水分子 / ナノ空間 / プロトン伝導 / 水和物 / 赤外分光 / マイクロ波 |
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| Research Abstract |
The gas handling apparatus was made to control relative humidity and pressure inside the pressure cell, which is equipped in our Fourier transformed infrared spectrometer. Employing the system, we tried the experiments on gas sorption of CO2, N2, Xe into the 14- and 18-sided cavities consisting of water molecules in the nanochannel. The appropriate relative humidity was determined to dehydrate the water molecules inside the water cage. In spite of infrared inactive molecular vibrations, noble infrared band due to the gas molecule hydrated in the water cage seems to appear, because charge polarization may be induced owing to strong hydrations and interfacial interactions. From the microwave conductivity and infrared spectra, we clarified that proton and protonic hole in the water network form an Eigen-type hydrate with a local distortion. The proton and protonic hole are generated by the self-dissociation of water molecules directly hydrogen bonded to the framework molecule.
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