| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7720948 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
Sulfonated poly(ether sulfone)s containing a mixture of cis and trans mesonaphthobifluorene moiety were synthesized, and their properties were characterized. The mesonaphthobifluorene graphene moiety contained 6 phenyl rings and was conjugated together to form planar sheets of sp2-bonded carbon. Poly(arylene ether sulfone)s containing a mixture of cis and trans tetraphenyl ethylene units were synthesized by polycondensation, and converted into graphene by intramolecular Friedel-Craft cyclization with Lewis acid (FeCl3). The sulfonation was taken selectively on mesonaphthobifluorene units with concentrated sulfuric acid. The structural properties of the sulfonated polymers were investigated by 1H NMR spectroscopy. The membranes were studied with regard to ion exchange capacity (IEC), water uptake, and proton conductivity.
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Authors
Youngdon Lim, Soonho Lee, Hohyoun Jang, Md. Awlad Hossain, Geonhui Gwak, Hyunchul Ju, Dongmin Kim, Whangi Kim,