Redox-Responsive 2-Aminoanthraquinone Core–Shell Particles for Structural Colors and Carbon Capture

Abstract

Quinone-containing materials have attracted significant attention for energy storage and electroswing carbon capture. Tailored redox-responsive core−shell particles are obtained in the present work via semicontinuous starved-feed emulsion polymerization and subsequent postmodification strategies with redox-responsive quinone moieties. The use of glycidyl methacrylate within the shell material offers the possibility of a ring-opening reaction with the redox-responsive 2-aminoanthraquinone (2-AAQ), which possesses a high affinity toward electrophilic carbon dioxide. The successful preparation of monodisperse particles, an essential prerequisite for colloidal selfassembly, was investigated by dynamic light scattering and transmission electron microscopy. The presence of reactive epoxy functionalities was achieved by the ring-opening reaction with the Preussmann reagent. Postsynthesis modification was investigated using X-ray photoelectron spectroscopy and cyclic voltammetry measurements. The redox-responsive core−shell particles were subjected to the melt-shear organization technique to prepare freestanding opal films featuring structural colors. The monodisperse 2-AAQ-containing particles were investigated for self-assembly inside conductive carbon felts, and their electrochemically mediated carbon capture capabilities were studied.

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