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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Solvent-induced terbium-emission in a fluorene-co-terpyridine metallopolymer

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Author(s):
Campos, Emerson C. G. [1] ; Turchetti, Denis A. [2] ; Zanlorenzi, Cristiano [2] ; Domingues, Raquel A. [3] ; Duarte, Luis G. T. A. [4] ; Atvars, Teresa D. Z. [4] ; Akcelrud, Leni [1]
Total Authors: 7
Affiliation:
[1] Fed Univ Parana UFPR, Paulo Scarpa Polymer Lab LaPPS, Grad Program Engn & Mat Sci, BR-81530900 Curitiba, Parana - Brazil
[2] Fed Univ Parana UFPR, Dept Chem, Paulo Scarpa Polymer Lab LaPPS, BR-81530900 Curitiba, Parana - 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
Total Affiliations: 4
Document type: Journal article
Source: Polymer; v. 229, AUG 16 2021.
Web of Science Citations: 1
Abstract

This work reports the solvent effects on the photophysical properties of an alternated terbium containing copolymer, composed by fluorene and terpyridine units. The metallopolymer presents dual emission with bands at 390 nm (polymer main chain - blue emission) and 544 nm (main transition of the terbium ion - green emission). It was found that the terbium emission is sensitive to the chemical environment. Among all the solvents tested, luminescence was detected in DMSO only. The results strongly suggested that an aggregationinduced emission phenomenon (AIE) was operating in the lanthanide emission when DMSO was used. The phenomenon was accounted to the restriction of intramolecular motion (high polarity and viscosity effect) of the polymer main chain optimizing the antenna effect in the terbium complex. Theoretical studies involving the terpyridine units have also been carried out suggesting that DMSO environment may act stabilizing these structures in a cis-cis conformation, blocking non-radiative energy losses, optimizing the energy transfer to terbium ion. (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