pH-Responsive Polyketone/5,10,15,20-Tetrakis-(Sulfonatophenyl)Porphyrin Supramolecular Submicron Colloidal StructuresAraya-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.
Research output: Contribution to journal › Article › Academic › peer-review
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.
|Number of pages||18|
|Publication status||Published - 3-Sep-2020|