pH-Responsive Polyketone/5,10,15,20-Tetrakis-(Sulfonatophenyl)Porphyrin Supramolecular Submicron Colloidal Structures

Araya-Hermosilla, E., Moreno-Villoslada, I., Araya-Hermosilla, R., Flores, M. E., Raffa, P., Biver, T., Pucci, A., Picchioni, F. & Mattoli, V., 3-Sep-2020, In : Polymers. 12, 9, p. 1-18 18 p., 2017.

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In this work, we prepared color-changing colloids by using the electrostatic self-assembly approach. The supramolecular structures are composed of a pH-responsive polymeric surfactant and the water-soluble porphyrin 5,10,15,20-tetrakis-(sulfonatophenyl)porphyrin (TPPS). The pH-responsive surfactant polymer was achieved by the chemical modification of an alternating aliphatic polyketone (PK) via the Paal-Knorr reaction with N-(2-hydroxyethyl)ethylenediamine (HEDA). The resulting polymer/dye supramolecular systems form colloids at the submicron level displaying negative zeta potential at neutral and basic pH, and, at acidic pH, flocculation is observed. Remarkably, the colloids showed a gradual color change from green to pinky-red due to the protonation/deprotonation process of TPPS from pH 2 to pH 12, revealing different aggregation behavior.

Original languageEnglish
Article number2017
Pages (from-to)1-18
Number of pages18
Issue number9
Publication statusPublished - 3-Sep-2020

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