Novel π-conjugated bio-based polymer, poly(3-amino-4-hydroxybenzoic acid),and its solvatochromism

Abstract

Soluble π-conjugated polymer derived from a renewable monomer, 3-amino-4-hydroxybenzoic acid (3,4-AHBA), was synthesized by an electropolymerization. The polymer has higher solubility in common solvents, compared to polyaniline, due to the polar side groups such as carboxyl and hydroxyl. The polymer showed various chromic behaviors based on the solvation and ionization of the side groups, and gave a flexible film with a conductivity as high as that of semiconductor. © 2014 IUPAC & De Gruyter.