Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/17872
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Campo DC | Valor | Idioma |
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dc.contributor.author | Coelho, Paulo J. | - |
dc.contributor.author | Carvalho, Luís M. | - |
dc.contributor.author | Gonçalves, Luís F. F. F. | - |
dc.contributor.author | Silva, Carlos J. R. | - |
dc.contributor.author | Campos, Ana M. F. Oliveira | - |
dc.contributor.author | Gomes, M. J. M. | - |
dc.date.accessioned | 2012-03-16T18:41:54Z | - |
dc.date.available | 2012-03-16T18:41:54Z | - |
dc.date.issued | 2010-07 | - |
dc.identifier.issn | 0928-0707 | por |
dc.identifier.uri | https://hdl.handle.net/1822/17872 | - |
dc.description.abstract | Several photochromic benzo- and naphthopyrans were embedded in hybrid organic-inorganic ureasilicate based films obtained by a sol-gel process. The resulting films, containing 0,1 % (w/w) of the photochromic compound, were transparent and flexible and for naphthopyrans they were colourless or presented just a slight colouration. Under UV continuous irradiation the films developed a significant absorption in the visible region that fades in the dark with variable kinetics depending on the naphthopyran structure. 2,2-Diphenyl-3H-naphtho[2,1-b]pyran films showed a very fast colouration under UV light giving rise to coloured open forms, containing mainly the TC isomer (98%) along with a very small amount of the more stable TT isomer (2%), that practically returned to the initial absorbance in one minute. | por |
dc.language.iso | eng | por |
dc.publisher | Springer Science+Business Media | por |
dc.rights | restrictedAccess | por |
dc.subject | Naphtopyran | por |
dc.subject | Sol-gel | por |
dc.subject | Ureasilicate | por |
dc.subject | Organic-inorganic hybrid | por |
dc.subject | Phtochromism | por |
dc.subject | UV light | por |
dc.subject | Kinetics | por |
dc.subject | Naphthopyran | por |
dc.subject | Photochromism | por |
dc.title | Photochromic hybrid sol-gel films containning naphtopyrans | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://dx.doi.org/10.1007/s10971-010-2295-5 | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 203 | por |
oaire.citationEndPage | 211 | por |
oaire.citationIssue | 2 | por |
oaire.citationTitle | Journal of Sol-Gel Science and Technology | por |
oaire.citationVolume | 56 | por |
dc.identifier.doi | 10.1007/s10971-010-2295-5 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Journal of Sol-Gel Science and Technology | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Photochromic sol V 8.0.doc revised.pdf Acesso restrito! | 158,75 kB | Adobe PDF | Ver/Abrir |