| Texto completo | |
| Autor(es): |
Gil, Yolimar
;
de Santana, Ricardo Costa
;
de Camargo, Andrea Simone Stucchi
;
Merizio, Leonnam Gotardo
;
Carreno, Patricia Farias
;
Fuentealba, Pablo
;
Manzur, Jorge
;
Spodine, Evgenia
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | DALTON TRANSACTIONS; v. 52, n. 10, p. 11-pg., 2023-02-07. |
| Resumo | |
Considering the structural design of some of the scarce molecular-based Er-centred emitters in the literature, we explored the optical properties of three Er-III hexaazamacrocyclic complexes, namely Er-EDA (1), Er-OPDA(2) and Er-DAP(3). The macrocyclic ligands in these complexes differ in the lateral spacers, and are derived from 2,6-pyridine-dicarbaldehyde and ethylenediamine (EDA), ortho-phenylenediamine (OPDA) or 1,3-diaminopropane (DAP). Upon ligand-centred excitation, the bluish-green and green emissions of the Er-III ion were detected only for the complexes containing macrocycles with aliphatic spacers (1 and 3), which evidenced that these ligands can sensitize the Er-III luminescence. On the other hand, the ligand derived from the aromatic diamine (2) does not sensitize the Er-III luminescence. Energy transfer mechanisms, temperature sensing, CIE coordinates and CCT values were analyzed. Besides the excitation in the ligands, the erbium-centred excitation at 980 nm allowed the detection, in all cases, of bluish-green, green and red up-converted emissions, and also the downshifted NIR emission. The possible mechanisms involved in these transitions were described and analyzed according to the available data. (AU) | |
| Processo FAPESP: | 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros |
| Beneficiário: | Edgar Dutra Zanotto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 19/21770-5 - Materiais luminescentes incorporados à vidros: novos compósitos para aplicações em iluminação de segurança e detectores de radiação |
| Beneficiário: | Leonnam Gotardo Merizio |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |