Dual visible and near-infrared luminescence in mononuclear macrocyclic erbium((III)) complexes( )via( )ligand and metal centred excitation

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

• 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