Publicação
Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes
| Resumo: | In this paper, we propose for the first time that the combination of a sol-gel derived diurethane cross-linked siloxane-based biohybrid host including short poly(ε-caprolactone) segments (PCL(530)) and lanthanide aquocomplexes incorporating β-diketonate ligands yields an effective protecting cage that efficiently encapsulates the emitting centers and reduces luminescence quenching. The results obtained using the Eu(tta) 3 (H 2 O) 2 (where tta - is 2-thenoyltrifluoracetonate) complex demonstrate that 1 (2) carbonyl oxygen atoms of the host matrix enter the Eu 3+ coordination shell, thus replacing the labile water molecule-(s). The significant increase in the quantum efficiency q of the doped hybrid with respect to that of Eu(tta) 3 (H 2 O) 2 (44.2 versus 29.0%, respectively) reveals that complex anchoring to the PCL(530)-based host structure contributes to enhancement of the 5 D 0 quantum efficiency. However, when a complex that contains only strong chelating ligands, such as Eu(tta) 3 phen (where phen is 1,10-phenantroline), is incorporated into the same host medium, the effect is lost and the 5 D 0 nonradiative paths in the doped hybrid are higher than those existing in the complex itself. Under UVA exposure, the emission intensity of PCL(530)/siloxane/Eu(tta) 3 (H 2 O) 2 decreased 10% in 11 h, whereas that of PCL(530)/siloxane/Eu-(tta) 3 phen decreased 25% in the same period of time. |
|---|---|
| Autores principais: | Fernandes, M. |
| Outros Autores: | Zea Bermudez, V. de; Ferreira, R. A. Sá; Carlos, Luís; Charas, A.; Morgado, J.; Silva, Maria Manuela; Smith, Michael John |
| Assunto: | Biohybrid Luminescent polymer Eu3+ doped network |
| Ano: | 2007 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1866270650086195200 |
|---|---|
| author | Fernandes, M. |
| author2 | Zea Bermudez, V. de Ferreira, R. A. Sá Carlos, Luís Charas, A. Morgado, J. Silva, Maria Manuela Smith, Michael John |
| author2_role | author author author author author author author |
| author_facet | Fernandes, M. Zea Bermudez, V. de Ferreira, R. A. Sá Carlos, Luís Charas, A. Morgado, J. Silva, Maria Manuela Smith, Michael John |
| author_role | author |
| contributor_name_str_mv | Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Fernandes, M.\"},{\"Person.name\":\"Zea Bermudez, V. de\"},{\"Person.name\":\"Ferreira, R. A. Sá\"},{\"Person.name\":\"Carlos, Luís\"},{\"Person.name\":\"Charas, A.\"},{\"Person.name\":\"Morgado, J.\"},{\"Person.name\":\"Silva, Maria Manuela\"},{\"Person.name\":\"Smith, Michael John\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Fernandes, M. Zea Bermudez, V. de Ferreira, R. A. Sá Carlos, Luís Charas, A. Morgado, J. Silva, Maria Manuela Smith, Michael John |
| datacite.date.Accepted.fl_str_mv | 2007-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2008-01-08T19:51:08Z |
| datacite.date.embargoed.fl_str_mv | 2008-01-08T19:51:08Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Biohybrid Luminescent polymer Eu3+ doped network |
| datacite.titles.title.fl_str_mv | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| dc.contributor.none.fl_str_mv | Universidade do Minho |
| dc.creator.none.fl_str_mv | Fernandes, M. Zea Bermudez, V. de Ferreira, R. A. Sá Carlos, Luís Charas, A. Morgado, J. Silva, Maria Manuela Smith, Michael John |
| dc.date.Accepted.fl_str_mv | 2007-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2008-01-08T19:51:08Z |
| dc.date.embargoed.fl_str_mv | 2008-01-08T19:51:08Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/7416 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | ACS Publications |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Biohybrid Luminescent polymer Eu3+ doped network |
| dc.title.fl_str_mv | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | In this paper, we propose for the first time that the combination of a sol-gel derived diurethane cross-linked siloxane-based biohybrid host including short poly(ε-caprolactone) segments (PCL(530)) and lanthanide aquocomplexes incorporating β-diketonate ligands yields an effective protecting cage that efficiently encapsulates the emitting centers and reduces luminescence quenching. The results obtained using the Eu(tta) 3 (H 2 O) 2 (where tta - is 2-thenoyltrifluoracetonate) complex demonstrate that 1 (2) carbonyl oxygen atoms of the host matrix enter the Eu 3+ coordination shell, thus replacing the labile water molecule-(s). The significant increase in the quantum efficiency q of the doped hybrid with respect to that of Eu(tta) 3 (H 2 O) 2 (44.2 versus 29.0%, respectively) reveals that complex anchoring to the PCL(530)-based host structure contributes to enhancement of the 5 D 0 quantum efficiency. However, when a complex that contains only strong chelating ligands, such as Eu(tta) 3 phen (where phen is 1,10-phenantroline), is incorporated into the same host medium, the effect is lost and the 5 D 0 nonradiative paths in the doped hybrid are higher than those existing in the complex itself. Under UVA exposure, the emission intensity of PCL(530)/siloxane/Eu(tta) 3 (H 2 O) 2 decreased 10% in 11 h, whereas that of PCL(530)/siloxane/Eu-(tta) 3 phen decreased 25% in the same period of time. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| fulltext.url.fl_str_mv | https://prod-dspace.uminho.pt/bitstreams/0ec9b38c-5aaa-49e6-bdd0-8a22f058b560/download |
| id | rum_f01a080790c8f34713ccfb03531d6fec |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/7416 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/7416 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Fernandes, M. Zea Bermudez, V. de Ferreira, R. A. Sá Carlos, Luís Charas, A. Morgado, J. Silva, Maria Manuela Smith, Michael John |
| publishDate | 2007 |
| publisher.none.fl_str_mv | ACS Publications |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engACS PublicationsengIn this paper, we propose for the first time that the combination of a sol-gel derived diurethane cross-linked siloxane-based biohybrid host including short poly(ε-caprolactone) segments (PCL(530)) and lanthanide aquocomplexes incorporating β-diketonate ligands yields an effective protecting cage that efficiently encapsulates the emitting centers and reduces luminescence quenching. The results obtained using the Eu(tta) 3 (H 2 O) 2 (where tta - is 2-thenoyltrifluoracetonate) complex demonstrate that 1 (2) carbonyl oxygen atoms of the host matrix enter the Eu 3+ coordination shell, thus replacing the labile water molecule-(s). The significant increase in the quantum efficiency q of the doped hybrid with respect to that of Eu(tta) 3 (H 2 O) 2 (44.2 versus 29.0%, respectively) reveals that complex anchoring to the PCL(530)-based host structure contributes to enhancement of the 5 D 0 quantum efficiency. However, when a complex that contains only strong chelating ligands, such as Eu(tta) 3 phen (where phen is 1,10-phenantroline), is incorporated into the same host medium, the effect is lost and the 5 D 0 nonradiative paths in the doped hybrid are higher than those existing in the complex itself. Under UVA exposure, the emission intensity of PCL(530)/siloxane/Eu(tta) 3 (H 2 O) 2 decreased 10% in 11 h, whereas that of PCL(530)/siloxane/Eu-(tta) 3 phen decreased 25% in the same period of time.application/pdfengHighly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexesFernandes, M.Zea Bermudez, V. deFerreira, R. A. SáCarlos, LuísCharas, A.Morgado, J.Silva, Maria ManuelaSmith, Michael JohnHostingInstitutionOrganizationalUniversidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf0897-4756ISSNIsPartOf1520-5002DOIIsPartOf10.1021/cm062832n2008-01-08T19:51:08Z200720062007-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/7416http://purl.org/coar/access_right/c_16ecrestricted accessBiohybridLuminescent polymerEu3+ doped network445351 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://prod-dspace.uminho.pt/bitstreams/0ec9b38c-5aaa-49e6-bdd0-8a22f058b560/download |
| spellingShingle | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes Fernandes, M. Biohybrid Luminescent polymer Eu3+ doped network |
| status | SINGLETON |
| subject.fl_str_mv | Biohybrid Luminescent polymer Eu3+ doped network |
| title | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| title_full | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| title_fullStr | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| title_full_unstemmed | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| title_short | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| title_sort | Highly photostable luminescent poly(caprolactone)siloxane biohybrids doped with europium complexes |
| topic | Biohybrid Luminescent polymer Eu3+ doped network |
| topic_facet | Biohybrid Luminescent polymer Eu3+ doped network |
| url | https://hdl.handle.net/1822/7416 |
| visible | 1 |