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Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films

The progression of the green emission spectrum during the decomposition of polyfluorenes (PFs) has impeded the development and commercialization of the materials. Herein, we constructed a solvent-tuned aggregated PFO film with the aim of retarding the material’s thermal degradation behavior which ca...

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Autores principales: Chew, Kang Wei, Abdul Rahim, Nor Azura, Teh, Pei Leng, Abdul Hisam, Nurfatin Syafiqah, Alias, Siti Salwa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029415/
https://www.ncbi.nlm.nih.gov/pubmed/35458365
http://dx.doi.org/10.3390/polym14081615
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author Chew, Kang Wei
Abdul Rahim, Nor Azura
Teh, Pei Leng
Abdul Hisam, Nurfatin Syafiqah
Alias, Siti Salwa
author_facet Chew, Kang Wei
Abdul Rahim, Nor Azura
Teh, Pei Leng
Abdul Hisam, Nurfatin Syafiqah
Alias, Siti Salwa
author_sort Chew, Kang Wei
collection PubMed
description The progression of the green emission spectrum during the decomposition of polyfluorenes (PFs) has impeded the development and commercialization of the materials. Herein, we constructed a solvent-tuned aggregated PFO film with the aim of retarding the material’s thermal degradation behavior which causes a significant decline in optical properties as a result of phase transformation. The tuning of the aggregate amount and distribution was executed by applying a poor alcohol-based solvent in chloroform. It emerges that at a lower boiling point methanol evaporates quickly, limiting the aggregate propagation in the film which gives rise to a more transparent film. Furthermore, because of the modulated β-phase conformation, the absorption spectra of PFO films were red-shifted and broadened. The increase in methanol percentage also led to a rise in β-phase percentage. As for the thermal degradation reactions, both pristine and aggregated PFO films exhibited apparent changes in the UV-Vis spectra and PL spectra. In addition, a 97:3 (chloroform:methanol) aggregated PFO film showed a more defined emission spectrum, which demonstrates that the existence of β-phase is able to suppress the unwanted green emission.
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spelling pubmed-90294152022-04-23 Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films Chew, Kang Wei Abdul Rahim, Nor Azura Teh, Pei Leng Abdul Hisam, Nurfatin Syafiqah Alias, Siti Salwa Polymers (Basel) Article The progression of the green emission spectrum during the decomposition of polyfluorenes (PFs) has impeded the development and commercialization of the materials. Herein, we constructed a solvent-tuned aggregated PFO film with the aim of retarding the material’s thermal degradation behavior which causes a significant decline in optical properties as a result of phase transformation. The tuning of the aggregate amount and distribution was executed by applying a poor alcohol-based solvent in chloroform. It emerges that at a lower boiling point methanol evaporates quickly, limiting the aggregate propagation in the film which gives rise to a more transparent film. Furthermore, because of the modulated β-phase conformation, the absorption spectra of PFO films were red-shifted and broadened. The increase in methanol percentage also led to a rise in β-phase percentage. As for the thermal degradation reactions, both pristine and aggregated PFO films exhibited apparent changes in the UV-Vis spectra and PL spectra. In addition, a 97:3 (chloroform:methanol) aggregated PFO film showed a more defined emission spectrum, which demonstrates that the existence of β-phase is able to suppress the unwanted green emission. MDPI 2022-04-15 /pmc/articles/PMC9029415/ /pubmed/35458365 http://dx.doi.org/10.3390/polym14081615 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chew, Kang Wei
Abdul Rahim, Nor Azura
Teh, Pei Leng
Abdul Hisam, Nurfatin Syafiqah
Alias, Siti Salwa
Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title_full Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title_fullStr Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title_full_unstemmed Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title_short Thermal Degradation of Photoluminescence Poly(9,9-dioctylfluorene) Solvent-Tuned Aggregate Films
title_sort thermal degradation of photoluminescence poly(9,9-dioctylfluorene) solvent-tuned aggregate films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9029415/
https://www.ncbi.nlm.nih.gov/pubmed/35458365
http://dx.doi.org/10.3390/polym14081615
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