Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/5488
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Nunes, Sílvia | - |
dc.contributor.author | Zea Bermudez, V. de | - |
dc.contributor.author | Silva, Maria Manuela | - |
dc.contributor.author | Smith, Michael John | - |
dc.contributor.author | Morales, Enrique | - |
dc.contributor.author | Ferreira, R. A. Sá | - |
dc.contributor.author | Carlos, Luís | - |
dc.contributor.author | Rocha, João | - |
dc.date.accessioned | 2006-09-01T09:43:40Z | - |
dc.date.available | 2006-09-01T09:43:40Z | - |
dc.date.issued | 2006-09-01T09:43:40Z | - |
dc.date.submitted | 2006-03 | - |
dc.identifier.issn | 1293-2558 | por |
dc.identifier.uri | https://hdl.handle.net/1822/5488 | - |
dc.description | Prova tipográfica (In Press) | eng |
dc.description | A publicar em "Solid States Sciences". | - |
dc.description.abstract | Zinc triflate (Zn(CF3SO3)2)-doped sol-gel derived di-urea cross-linked POE/siloxane ormolytes (designated as di-ureasils) with ∞ > n ≥ 1 (where the salt content is expressed as n, the molar ratio of oxyethylene moieties to Zn2+ ions) were investigated. The hybrids with n ≥ 5 are entirely amorphous; those with n > 10 are thermally stable up to approximately 305 ºC. The siliceous network of representative samples (n = 200 and 10) is essentially composed of (SiO)3Si(CH2)- environments and is thus highly branched. The distance between the structural units in samples with 200 ≥ n ≥ 10 and n ≤ 7 is 4.2 and 4.3 Å, respectively. The estimated interdomain distance is 11 and 13 Å for xerogels with 200 ≥ n ≥ 20 and n ≤ 10, respectively. At n = 1 a crystalline POE/Zn(CF3SO3)2 complex of unknown stoichiometry is formed. The conductivity maxima are located at n = 60 (3x10-6 S cm-1) and n = 20 (7x10-5 S cm-1) at 30 and 100 ºC, respectively. | eng |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia - POCTI/P/CTM/46780/03; SFRH/BD/13559/03. | eng |
dc.language.iso | eng | eng |
dc.publisher | Elsevier Science BV | por |
dc.rights | openAccess | eng |
dc.subject | Ionic conductivity | eng |
dc.subject | POE/siloxane | eng |
dc.subject | Di-ureasils | eng |
dc.subject | Zinc triflate | eng |
dc.title | Study of sol-gel derived di-ureasils doped with zinc triflate | eng |
dc.type | article | por |
oaire.citationStartPage | 1484 | por |
oaire.citationEndPage | 1491 | por |
oaire.citationIssue | 12 | por |
oaire.citationVolume | 8 | por |
dc.identifier.doi | 10.1016/j.solidstatesciences.2006.07.013 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Solid State Sciences | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
newSSScZn.pdf | main article with figures and tables | 1,64 MB | Adobe PDF | Ver/Abrir |