| Microviscosity in modified Nafion membranes measured by fluorescence probes |
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| 作者姓名： | 官景渠 佟振合 |
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| 作者单位： | Institute of Photographic Chemistry，Chinese Academy of Sciences，Beijing 100101，China，Institute of Photographic Chemistry，Chinese Academy of Sciences，Beijing 100101，China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China |
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| 摘 要： | Sodium or quaternary ammonium modified Nafion membranes in forms of Nafion-Na+,Nafion-NMe4+,Nafion-NEt4+ and Nafion-NBu4+ have been prepared by neutralizing Nafion-H+ membrane with NaOH or tetraalkylammonium hydroxide aqueous solution.Intramolecular excimer formation and fluorescence polarization methods using l,3-di(1-pyrenyl)propane and acridine orange as probes respectively have been employed for measurements of the microviscosity within those modified Nafion membranes.Results show that the probes are located in the fluorocarbon/water interface in the cluster of the membranes and the microviscosities around the probe molecules are in the range of ca.120-1200 cp and increase in the order of Nafion-Na+
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Microviscosity in modified Nafion membranes measured by fluorescence probes |
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| GUAN,Jing-Qu TUNG,Chen-HoInstitute of Photographic Chemistry,Chinese Academy of Sciences,Beijing ,China.Microviscosity in modified Nafion membranes measured by fluorescence probes[J].Chinese Journal of Chemistry,1998,16(4):322-329. |
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| Authors: | GUAN Jing-Qu TUNG Chen-HoInstitute of Photographic Chemistry Chinese Academy of Sciences Beijing China |
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| Institution: | GUAN,Jing-Qu TUNG,Chen-HoInstitute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101,China |
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| Abstract: | Sodium or quaternary ammonium modified Nafion membranes in forms of Nafion-Na+,Nafion-NMe4+,Nafion-NEt4+ and Nafion-NBu4+ have been prepared by neutralizing Nafion-H+ membrane with NaOH or tetraalkylammonium hydroxide aqueous solution.Intramolecular excimer formation and fluorescence polarization methods using l,3-di(1-pyrenyl)propane and acridine orange as probes respectively have been employed for measurements of the microviscosity within those modified Nafion membranes.Results show that the probes are located in the fluorocarbon/water interface in the cluster of the membranes and the microviscosities around the probe molecules are in the range of ca.120-1200 cp and increase in the order of Nafion-Na+
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| Keywords: | Modified Nafion microviscosity excimer formation fluorescence polarization |
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