Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/65997
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Campo DC | Valor | Idioma |
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dc.contributor.author | Pereira, Rui F. P. | por |
dc.contributor.author | Nunes, Sílvia C. | por |
dc.contributor.author | Toquer, Guillaume | por |
dc.contributor.author | Cardoso, Marita A. | por |
dc.contributor.author | Valente, Artur J. M. | por |
dc.contributor.author | Ferro, Marta C. | por |
dc.contributor.author | Silva, Maria M. | por |
dc.contributor.author | Carlos, Luís D. | por |
dc.contributor.author | Ferreira, Rute A. S. | por |
dc.contributor.author | Bermudez, Verónica de Zea | por |
dc.date.accessioned | 2020-07-14T15:34:43Z | - |
dc.date.available | 2020-07-14T15:34:43Z | - |
dc.date.issued | 2018 | - |
dc.identifier.issn | 2296-2646 | por |
dc.identifier.uri | https://hdl.handle.net/1822/65997 | - |
dc.description.abstract | Amine-functionalized bridged silsesquioxanes (BSs) were synthesized from bis[(3-trimethoxysilyl)propyl] amine via a solvent-mediated route. BS-1 and BS-2 were obtained at neutral pH with sub- and stoichiometric amounts of water, respectively, and high tetrahydrofuran content. BS-3 was prepared with hyperstoichiometric water concentration, high tetrahydrofuran content, and hydrochloric acid. BS-4 was synthesized with hyperstoichiometric water concentration, high ethanol content, and sodium hydroxide. BS-1 and BS-2 were produced as transparent films, whereas BS-3 and BS-4 formed white powders. Face-to-face stacking of flat or folded lamellae yielded quasi-hydrophobic platelets with emission quantum yields of 0.05 ± 0.01 (BS-1 and BS-2) or superhydrophilic onion-like nanoparticles with exciting emission quantum yields of 0.38 ± 0.03 (BS-3) and 0.33 ± 0.04 (BS-4), respectively. The latter two values are the largest ever reported for amine-functionalized siloxane-based hybrids lacking aromatic groups. Fast Grotthus proton hopping between = [Formula: see text]/ = NH groups (BS-3) and = N-/ = NH groups (BS-4), promoted by H+ and OH- ions, respectively, and aided by short amine-amine contacts provided by the onion-like morphology, account for this unique optical behavior. | por |
dc.description.sponsorship | This work was supported by Fundacao para a Ciencia e a Tecnologia (FCT)/MEC and FEDER (contracts UID/QUI/00616/2013, POCI-01-0145-FEDER-007491, and UID/Multi/00709/2013) and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement, project UniRCell (Ref. SAICTPAC/0032/2015, POCI-01-0145-FEDER-016422), and project LUMECD (Ref. PTDC/CTM/NAN/0956/20149 and POCI-01-0145-FEDER-016884). RP and MC acknowledge FCT for grants SFRH/BPD/87759/2012 and SFRH/BD/118466/2016, respectively. SN also acknowledges FCT for grants SFRH/BPD/63152/2009 and Post-PhD Fellowship of LUMECD project. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT-Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. | por |
dc.language.iso | eng | por |
dc.publisher | Frontiers Media | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147416/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147255/PT | por |
dc.relation | SAICTPAC/0032/2015 | por |
dc.relation | PTDC/CTM/NAN/0956/20149 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F87759%2F2012/PT | por |
dc.relation | SFRH/BD/118466/2016 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F63152%2F2009/PT | por |
dc.relation | SFRH/BD/118466/2016 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F63152%2F2009/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876/147332/PT | por |
dc.rights | openAccess | por |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | por |
dc.subject | bis[(3-trimethoxysilyl) propyl] amine | por |
dc.subject | sol-gel chemistry | por |
dc.subject | solvent-assisted structuring | por |
dc.subject | morphology | por |
dc.subject | luminescence | por |
dc.title | Novel highly luminescent amine-functionalized bridged silsesquioxanes | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://www.frontiersin.org/articles/10.3389/fchem.2017.00131/full | por |
oaire.citationVolume | 5 | por |
dc.identifier.doi | 10.3389/fchem.2017.00131 | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Frontiers in Chemistry | por |
oaire.version | VoR | por |
Aparece nas coleções: | CDQuim - Artigos (Papers) |
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Ficheiro | Descrição | Tamanho | Formato | |
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fchem-05-00131.pdf | 8,04 MB | Adobe PDF | Ver/Abrir |
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