Transport of some nitrogen heterocyclic and aromatic compounds through metal ion containing Nafion ionomer membrane |
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| Affiliation: | 1. Department of Molecular Sciences and Nanosystems, University Ca’ Foscari Venice, Via Torino 155, Venice 30137, Italy;2. NIMBE-LAPA, CEA, CNRS, Université Paris-Saclay, CEA Saclay, Gif-sur-Yvette 91191 France;1. Laboratorio de Materiales y Energía, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago, Chile;2. Centro de Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago, Chile;3. Centro de Investigación de Procesos Redox (CiPRex), Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile;4. Facultad de Química y Biología, Departamento de Química de los Materiales, Universidad de Santiago de Chile, Santiago, Chile;5. Facultad de Química y de Farmacia, Departamento de Química-Física, Pontificia Universidad Católica de Chile, Macul, Santiago, Chile |
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| Abstract: | The permeation of some nitrogen heterocyclic bases, such as 1,10-phenanthroline, 2,2′-bipyridyl and 2-aminopyridine, and several aromatic compounds, namely styrene, toluene, nitrobenzene, aniline and biphenyl, through Nafion 117 ionomer membrane in H+, Na+, Cu2+ and Ag+ form has been studied. The permeation fluxes of the organic solutes through the membrane were measured by determining the concentration of the compounds in the sweep solutions using HPLC or flow injection technique. The positive role of metal ions in enhancing the permeation flux has been attributed to the complex formation of the solutes with the metal ions in the membrane. The contribution of the molecular structure of the permeates and steric effects are also discussed. The separation of some binary mixtures under favourable conditions is also shown. |
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