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Title: Designing highly fluorescent, arylated poly(phenylene vinylene)s of intrinsic microporosity
Authors: Rodrigues, Ana Clara B. 
Geisler, Isabell S.
Klein, Patrick
Pina, João 
Neuhaus, Fabian J. H.
Dreher, Elke
Lehmann, Christian W.
Scherf, Ullrich 
Melo, J. Sérgio Seixas de 
Issue Date: 2020
Publisher: Royal Society of Chemistry
Project: PEst- OE/QUI/UI0313/2014 
info:eu-repo/grantAgreement/EC/FP7/284464/EU/The Integrated Initiative of European Laser Research Infrastructures III 
Serial title, monograph or event: Journal of Materials Chemistry C
Volume: 8
Issue: 7
Abstract: Three new polymers containing tetraphenylethylene and diphenyl-dinaphthylethylene cores and their corresponding monomeric model compounds were synthesized and fully characterized aiming to investigate their photoluminescence efficiency, microporosity and Brunauer–Emmett–Teller-derived surface areas (SBET). Comprehensive photophysical characterization was undertaken in the solid state (powder and thin films), in tetrahydrofuran (THF) solution and in mixtures of “good” and “poor” solvent to induce aggregation (THF:water mixtures). Aggregation induced emission (AIE) was found for the tert-butyl-TPE monomer and polymer and diphenyl-dinaphthylethylene monomer with the increase of the water amount in THF:water mixtures and in the solid state. The tert-butyl substituted TPE derivatives display the highest fluorescence quantum yield (ϕF) values: 0.14 to 0.30 (in powder) and 0.46 to 0.64 in thin films. In contrast, with the diphenyl-dinaphthylethylene (meta and para-phenylene) polymers aggregation caused quenching (ACQ) occurs in THF:water mixtures (ϕF ≤ 0.011) and in the solid state (ϕF ≤ 0.012). The microporosity of the soluble conjugated polymers as potential conjugated polymers of intrinsic microporosity (cPIMs) was further investigated. The SBET of the polymers were related to their optical properties. The polymers show an attractive combination of high SBET surface area (417 m2 g−1) and the occurrence of distinct AIE effects for the tert-butyl-TPE polymer while the diphenyl-dinaphthylethylene polymers do not exhibit microporosity (SBET ≤ 17 m2 g−1) and show ACQ behavior.
ISSN: 2050-7526
DOI: 10.1039/C9TC06028F
Rights: openAccess
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais

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