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  • Nunes, S. C.Universidade de Tras-os-Montes e Alto Douro,University of Trás-os-Montes and Alto Douro (author)

Sol-gel-derived potassium-based di-ureasils for "smart windows''

  • Article/chapterEnglish2007

Publisher, publication year, extent ...

  • Royal Society of Chemistry (RSC),2007

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:b52de228-7641-4766-b116-13826141cf9b
  • https://doi.org/10.1039/b708905hDOI
  • https://research.chalmers.se/publication/76831URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Sol-gel-derived KCF3SO3-doped di-urea cross-linked poly(oxyethylene) (POE)/siloxane (di-ureasil) ormolytes with infinity > n >= 1 (n is the number of oxyethylene units per K+ ion) have been analysed. Samples with n. 40 are thermally stable up to 310 degrees C. At n >= 100, POE crystallites are present. At n = 5, a crystalline POE-KCF3SO3 complex with stoichiometry 1 : 1 is formed. In the xerogel with n = 1 this complex coexists with free salt. The highest ionic conductivity is reached at n = 20. The redox stability domain of this material spans 5.0 V. "Free'' anions and weakly coordinated CF3SO3- ions appear to be the main charge carriers at n = 20. The K+ ions interact with the urea carbonyl oxygen atoms at all salt concentrations. Complexation of the cations by POE occurs at n

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Bermudez, V. D.Universidade de Tras-os-Montes e Alto Douro,University of Trás-os-Montes and Alto Douro (author)
  • Silva, M. M.Universidade do Minho,University of Minho (author)
  • Smith, M. J.Universidade do Minho,University of Minho (author)
  • Ostrovskii, Denis,1967Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)dostr (author)
  • Ferreira, R. A. S. (author)
  • Carlos, L. D. (author)
  • Rocha, J. (author)
  • Goncalves, A.Universidade do Porto,University of Porto (author)
  • Fortunato, E.Universidade do Porto,University of Porto (author)
  • Universidade de Tras-os-Montes e Alto DouroUniversidade do Minho (creator_code:org_t)

Related titles

  • In:Journal of Materials Chemistry: Royal Society of Chemistry (RSC)17:40, s. 4239-42481364-55010959-9428

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