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Hypersulfonated polyelectrolytes: preparation, stability and conductivity

Takamuku, Shogo LU ; Wohlfarth, Andreas; Manhart, Angelika; Räder, Petra and Jannasch, Patric LU (2015) In Polymer Chemistry 6(8). p.1267-1274
Abstract
Specially tailored polyelectrolytes are becoming important as energy-related materials. Here we explore a synthetic strategy to prepare fully aromatic polymers containing single phenylene rings in the backbone functionalized with four sulfonic acid groups. Thioether bridges of semifluorinated poly(arylene thioether)s were oxidized to sulfone bridges, followed by substitution of all fluorines by NaSH and quantitative oxidation of the resulting thiol groups. This gave poly(arylene sulfone)s containing octasulfonated biphenyl units, reaching ion exchange capacities up to 8 meq. g-1 and unprecedented high local sulfonic acid concentrations. These polyelectrolytes are stable up to 300 °C under air and achieve proton conductivities of up to 90... (More)
Specially tailored polyelectrolytes are becoming important as energy-related materials. Here we explore a synthetic strategy to prepare fully aromatic polymers containing single phenylene rings in the backbone functionalized with four sulfonic acid groups. Thioether bridges of semifluorinated poly(arylene thioether)s were oxidized to sulfone bridges, followed by substitution of all fluorines by NaSH and quantitative oxidation of the resulting thiol groups. This gave poly(arylene sulfone)s containing octasulfonated biphenyl units, reaching ion exchange capacities up to 8 meq. g-1 and unprecedented high local sulfonic acid concentrations. These polyelectrolytes are stable up to 300 °C under air and achieve proton conductivities of up to 90 mS cm-1 at 120 °C and 50% relative humidity. Despite the excellent performance of this unique new class of hypersulfonated polymers, our data suggests that incomplete proton dissociation may ultimately limit the conductivity of highly sulfonated polymers. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Polymer Chemistry
volume
6
issue
8
pages
1267 - 1274
publisher
Royal Society of Chemistry
external identifiers
  • wos:000349666600007
  • scopus:84922901401
ISSN
1759-9954
DOI
10.1039/C4PY01177E
language
English
LU publication?
yes
id
4bf39369-5670-4ae9-ab7f-51ff5f3b2234 (old id 4779892)
alternative location
http://pubs.rsc.org/en/Content/ArticleLanding/2015/PY/C4PY01177E#!divAbstract
date added to LUP
2014-12-12 15:17:42
date last changed
2017-05-07 03:19:20
@article{4bf39369-5670-4ae9-ab7f-51ff5f3b2234,
  abstract     = {Specially tailored polyelectrolytes are becoming important as energy-related materials. Here we explore a synthetic strategy to prepare fully aromatic polymers containing single phenylene rings in the backbone functionalized with four sulfonic acid groups. Thioether bridges of semifluorinated poly(arylene thioether)s were oxidized to sulfone bridges, followed by substitution of all fluorines by NaSH and quantitative oxidation of the resulting thiol groups. This gave poly(arylene sulfone)s containing octasulfonated biphenyl units, reaching ion exchange capacities up to 8 meq. g-1 and unprecedented high local sulfonic acid concentrations. These polyelectrolytes are stable up to 300 °C under air and achieve proton conductivities of up to 90 mS cm-1 at 120 °C and 50% relative humidity. Despite the excellent performance of this unique new class of hypersulfonated polymers, our data suggests that incomplete proton dissociation may ultimately limit the conductivity of highly sulfonated polymers.},
  author       = {Takamuku, Shogo and Wohlfarth, Andreas and Manhart, Angelika and Räder, Petra and Jannasch, Patric},
  issn         = {1759-9954},
  language     = {eng},
  number       = {8},
  pages        = {1267--1274},
  publisher    = {Royal Society of Chemistry},
  series       = {Polymer Chemistry},
  title        = {Hypersulfonated polyelectrolytes: preparation, stability and conductivity},
  url          = {http://dx.doi.org/10.1039/C4PY01177E},
  volume       = {6},
  year         = {2015},
}