Unveiling polymerization mechanism in pH-regulated supramolecular fibers in aqueous media
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Muñoz Casellas, Nicolás; Albertazzi, Lorenzo; Pujals Riatós, Silvia; Torres Cebada, Tomás; García Iglesias, MiguelFecha
2021-08-02Derechos
Attribution 4.0 International
Publicado en
Chemistry - A European Journal, 2021, 27(43), 11056-11060
Editorial
Wiley-VCH Verlag
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Palabras clave
pH responsivity
Polymerization mechanism
Self-assembly
Supramolecular chemistry
Supramolecular polymers
Resumen/Abstract
An amine functionalized C3-symmetric benzotrithiophene (BTT) monomer has been designed and synthetized in order to form pH responsive one-dimensional supramolecular polymers in aqueous media. While most of the reported studies looked at the effect of pH on the size of the aggregates, herein, a detailed mechanistic study is reported, carried out upon modifying the pH to trigger the formation of positively charged ammonium groups. A dramatic and reversible change in the polymerization mechanism and size of the supramolecular fibers is observed and ascribed to the combination of Coulombic repulsive forces and higher monomer solubility. Furthermore, the induced frustrated growth of the fibers is further employed to finely control the one-dimensional supramolecular polymerisation and copolymerization processes.
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