Viscosity-induced dual-emission of europium ions containing metallopolymer

Autor(es)

Campos, Emerson C. G. ^[1] ; Turchetti, Denis A. ^[2] ; Santana, Alisson J. ^[2] ; Domingues, Raquel A. ^[3] ; Duarte, Luis G. T. A. ^[4] ; Atvars, Teresa D. Z. ^[4] ; Akcelrud, Leni ^[1]

Afiliação do(s) autor(es)

^[1] Fed Univ Parana UFPR, Grad Program Engn & Mat Sci PIPE, Paulo Scarpa Polymer Lab LaPPS, BR-81530900 Curitiba, PR - Brazil

^[2] Fed Univ Parana UFPR, Dept Chem, Paulo Scarpa Polymer Lab LaPPS, BR-81530900 Curitiba, PR - Brazil

^[3] Univ Fed Sao Paulo, Inst Sci & Technol, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[4] Univ Campinas UNICAMP, Chem Inst, BR-13084971 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Synthetic Metals; v. 273, MAR 2021.
• Citações Web of Science: 0

Resumo

A hybrid structure poly {[}(9,9'-dihexyl-9H-fluoren-2,7-yl)-6,6'-(2,2':6,2 `'-terpyridine)] complexed with europium trisl3-trifluommetyhydroxymethylenel-(+)-camphorate, with luminescence sensitive to viscous chemical environments is presented. Four solvents were tested: chloroform, toluene, DMF and DMSO. The material depicts a dual-emission profile with red luminescence from europium ions in the DMF and DMSO media, whereas in chloroform and toluene solution the structure presents blue emission only. In this study, absorption, excitation, emission and lifetime measurements are presented and discussed. It is suggested that DMSO and DMF restrict intramolecular motion / rotation on the polymer backbone, minimizing non-radioactive energy losses and promoting the europium luminescence via aggregation-induced emission (AIE), caused by the viscous environments. (AU)

• Processo FAPESP: 16/18511-0 - Estudo da Estabilidade, Propriedades Térmicas e Luminescentes de Materiais Híbridos formados por Polissiloxanos e Polímeros Semicondutores visando Aplicação em Dispositivos Emissores de Luz (LEDs)
• Beneficiário: Raquel Aparecida Domingues
• Modalidade de apoio: Auxílio à Pesquisa - Regular