Towards opto-structural parameters to enhance the circularly polarized luminescence brightness of EuIII β-diketone complexes with chiral auxiliary ligands

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorDiogenis, Isabela Moreira Soares-
Autor(es): dc.creatorBispo-Jr, Airton Germano-
Autor(es): dc.creatorPirovani, Rodrigo Vezula-
Autor(es): dc.creatorSaraiva, Leonardo Figueiredo-
Autor(es): dc.creatorGozzo, Fabio Cesar-
Autor(es): dc.creatorCorreia, Carlos Roque Duarte-
Autor(es): dc.creatorMazali, Italo Odone-
Autor(es): dc.creatorNome, Rene Alfonso-
Autor(es): dc.creatorSigoli, Fernando Aparecido-
Data de aceite: dc.date.accessioned2025-08-21T17:19:02Z-
Data de disponibilização: dc.date.available2025-08-21T17:19:02Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-03-11-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/d3tc04127a-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/308267-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/308267-
Descrição: dc.descriptionCircularly polarized luminescence (CPL) from lanthanide (LnIII) complexes has aroused extensive attention in the last decade owing to its potential use in displays or as anti-counterfeiting devices, for instance. However, the design of LnIII complexes matching high luminescence dissymmetry factor and CPL brightness still limits their real application. To help deal with this challenging task, presented herein is a series of [Eu(hfa)3(chiral)] complexes, (chiral = S-Bn-pybox = 2,6-bis((S)-4-benzyl-4,5-dihydrooxazole-2-yl)pyridine, S-Ph-pyox = (S)-4-phenyl-2-(pyridin-2-yl)-4,5-dihydrooxazole, or (R)-Cl-(S)-Ph-pzox = N-((R)-2-cloro-1-phenyletyl)-3-((S)-4-phenyl-4,5-dihydrooxazole-2-yl)pyrazine-2-carboxamide; hfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione), aiming to understand through opto-structural correlations how the overall emission quantum yield (ϕLLn), dissymmetry factor (glum), as well as CPL brightness can be finely tuned by changing the electronic structure and symmetry of the EuIII coordination polyhedron. [(Eu(hfa)3(S)-Bn-pybox)] displayed the largest |glum| values (0.36 in dichloromethane) for the 5D0 → 7F1 transition and the highest CPL brightness reported so far (465 M−1 cm−1 in dichloromethane) for the 5D0 → 7F2 transition. By combining the experimental photoluminescence and computational data, we were able to show that the bright CPL is a consequence of the quite high emission quantum yield in dichloromethane (41.4%), the large branching ratio of the 5D0 → 7F2 transition, and the increase of the magnetic dipole momentum contribution to the EuIII transitions owing to the low EuIII local microsymmetry. Thus, our investigation helps to provide further guidance on how the electronic structure of the complexes and the EuIII local microsymmetry can play synergistically to improve the CPL brightness of EuIII complexes.-
Descrição: dc.descriptionDepartment of Inorganic Chemistry Institute of Chemistry State University of Campinas (UNICAMP), SP-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (UNESP) School of Sciences and Technology, SP-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (UNESP) School of Sciences and Technology, SP-
Formato: dc.format5097-5107-
Idioma: dc.languageen-
Relação: dc.relationJournal of Materials Chemistry C-
???dc.source???: dc.sourceScopus-
Título: dc.titleTowards opto-structural parameters to enhance the circularly polarized luminescence brightness of EuIII β-diketone complexes with chiral auxiliary ligands-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.