Probing proton dissociation in ionic polymers by means of in situ ATR-FTIR spectroscopy
| Autor: | Philippe Bebin, S. Deabate, Philippe Sistat, Patrick Bouchard, Patrice Huguet, Samuel Castagnoni, Lidwine Grosmaire, Mario Boucher |
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| Přispěvatelé: | Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM) |
| Rok vydání: | 2008 |
| Předmět: |
Polymers
Analytical chemistry General Physics and Astronomy Infrared spectroscopy Ionic bonding Ether Biocompatible Materials 02 engineering and technology 010402 general chemistry 01 natural sciences Dissociation (chemistry) Polyethylene Glycols chemistry.chemical_compound Benzophenones Nafion Spectroscopy Fourier Transform Infrared [CHIM]Chemical Sciences Sulfones Physical and Theoretical Chemistry Spectroscopy ComputingMilieux_MISCELLANEOUS Ions Chemistry Sodium Cationic polymerization Water Membranes Artificial Ketones 021001 nanoscience & nanotechnology 0104 chemical sciences Membrane Physical chemistry Protons 0210 nano-technology |
| Zdroj: | Physical Chemistry Chemical Physics Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2008, 10, pp.1577-1583. ⟨10.1039/B714870D⟩ |
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/B714870D⟩ |
| Popis: | The hydration process of cationic membrane protogenic groups was investigated using in situ ATR-FTIR spectroscopy. The aim of this study is to provide a relationship between the hydration degree of the membrane and the dissociation state of exchange sites inside the polymer material. IR spectra were recorded by means of an environmental device specifically manufactured to allow the control of water vapour pressure in equilibrium with the sample. The behaviour of Nafion 112 and sulfonated poly(ether ether ketone) (S-PEEK), in both proton and sodium forms, was compared. IR data, analyzed and fitted in the 800-1850 cm(-1) spectral range, gave precise information on the assignment of sulfonic group vibrational modes. The results of this study improve the understanding of the transition phenomena between dissociated and undissociated states of the grafted sites in protonic conductors. |
| Databáze: | OpenAIRE |
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