| Texto completo | |
| Autor(es): |
Bispo-Jr, Airton Germano
;
Mazali, Italo Odone
;
Sigoli, Fernando Aparecido
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS CHEMISTRY C; v. 10, n. 38, p. 8-pg., 2022-08-15. |
| Resumo | |
Luminescence thermometry based on Ln(III) systems has become a hotspot in nanotechnology, biotechnology, and integrated optics, whereas the self-calibrated two-band intensity ratiometric method excels in this. Herein, propyldiphenylphosphine oxide (pdppo)-functionalized polydimethylsiloxane (PDMS) was reacted with [Ln(X-bza)(3)(H2O)(2)] complexes (Ln = Eu, Tb, or Yb, X-bza = 3,5-dichlorobenzoate or 3,5-dibromo benzoate) leading to chemically bound [Ln(X-bza)(3)(pdppo)(2)]-PDMS membranes. The systems were used as luminescent temperature probes by exploiting a new strategy based on two different thermally dependent excitation channels arising from spin-allowed singlet -> singlet or spin forbidden singlet -> triplet transitions. To define the thermometric parameter, the intensity ratio of the Ln(III) emission spectra measured upon singlet -> singlet or singlet -> triplet excitation was considered, which enables achieving ratiometric single-centered Eu-III or Tb-III or Yb-III-based luminescent temperature probes within 50-320 K. The maximum thermal sensitivity lies within 0.5-1.6% K-1 whereas the largest value was accomplished for [Yb(3,5-bbza)(3)(pdppo)(2)]-PDMS (1.6% K-1 at 120 K), which is among the best value reported for NIR-emitting single-center Ln(III) luminescent temperature probes. (AU) | |
| Processo FAPESP: | 12/11382-9 - Modulação ótica de sistemas nanoestruturados usando ondas acústicas de superfícies |
| Beneficiário: | Odilon Divino Damasceno Couto Júnior |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 13/22127-2 - Desenvolvimento de novos materiais estratégicos para dispositivos analíticos integrados |
| Beneficiário: | Lauro Tatsuo Kubota |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 21/06326-1 - Luminescência de íons lantanídeos: uma ferramenta óptica contra falsificações |
| Beneficiário: | Fernando Aparecido Sigoli |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/02614-0 - Silicatos emissores de luz branca dopados com lantanídeos e metais de transição para aplicação em diodos emissores de luz branca quente |
| Beneficiário: | Marian Rosaly Davolos |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |