Viscosity-induced dual-emission of europium ions containing metallopolymer

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: Synthetic Metals; v. 273, MAR 2021.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 16/18511-0 - Stability, Thermal and Luminescent Properties of Hybrid Materials Formed by Polysiloxanes and Organic Semiconducting Polymers aiming Application in Ligth Emitting Diodes (LEDs).
• Grantee: Raquel Aparecida Domingues
• Support Opportunities: Regular Research Grants