Brush-like Polyaniline with Optical and Electroactive Properties at Neutral pH and High Temperature

In this research, a brush-like polyaniline (poly(2-acrylamide-2-methyl-1-propanesulfonate)-g-polyaniline)-b-poly(N-vinylcarbazole) (BL PAni) was developed as a strategy to overcome the limited processability and dedoping above pH 4 of conventional polyaniline (PAni). For the BL PAni synthesis, RAFT...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-08, Vol.23 (15), p.8085
Main Authors: Conejo-Dávila, Alain Salvador, Casas-Soto, Carlos Rafael, Aparicio-Martínez, Eider Pedro, Chávez-Flores, David, Ramos-Sánchez, Víctor Hugo, Dominguez, Rocio Berenice, Osuna, Velia Carolina, Estrada-Monje, Anayansi, Vega-Rios, Alejandro, Zaragoza-Contreras, Erasto Armando
Format: Article
Language:English
Subjects:
Absorption
Acrylamide
Addition polymerization
Block copolymers
brush-like polyaniline
Carbazole
Carbazoles
Carbon
Copolymers
Electroactivity
Emulsion polymerization
Graft copolymers
Heat resistance
High temperature
neutral pH
NMR
Nuclear magnetic resonance
poly(N-vinylcarbazole)
Polyanilines
Polymerization
Polymers
Polyvinyl carbazole
Quantum dots
RAFT-polymerization
Spectroscopy
Spectrum analysis
Surfactants
Vibration
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Summary:In this research, a brush-like polyaniline (poly(2-acrylamide-2-methyl-1-propanesulfonate)-g-polyaniline)-b-poly(N-vinylcarbazole) (BL PAni) was developed as a strategy to overcome the limited processability and dedoping above pH 4 of conventional polyaniline (PAni). For the BL PAni synthesis, RAFT polymerization (homopolymer), RAFT-mediated surfactant-free emulsion polymerization (block copolymer), and interfacial oxidative polymerization were applied to graft the PAni chains. NMR and FT-IR spectroscopies were performed to confirm the structural elucidation of the reaction pathways, while the thermal properties were analyzed by TGA and DSC. Notably, the BL PAni presents absorption throughout the visible region and up to the near-infrared, showing dedoping resistance at up to 80 °C and at a neutral pH. The absorption range of the BL PAni, block copolymer, and homopolymer were studied by UV–Vis spectroscopy in solid-state and dispersion/solution, highlighting BL PAni and poly(anilinium 2-acrylamide-2-methyl-1-propanesulfonate)-b-poly(N-vinylcarbazole) (PAAMP-b-PVK) due to the π-stacking between the anilinium and carbazole groups. The cyclic voltammetry confirmed the persistence of electroactivity at a pH near 7.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23158085