Visible Light-Responsive DASA-Polymer Conjugates

Ulrich, S., Hemmer, J. R., Page, Z. A., Dolinski, N. D., Rifaie-Graham, O., Bruns, N., Hawker, C. J., Boesel, L. F., Read de Alaniz, J.
ACS Macro Letters
6, pp 738–742

A modular synthesis of Donor–Acceptor Stenhouse Adduct (DASA) polymer conjugates is described. Pentafluorophenyl-ester chemistry is employed to incorporate aromatic amines into acrylate and methacrylate copolymers, which are subsequently coupled with activated furans to generate polymers bearing a range of DASA units in a modular manner. The effect of polymer glass transition temperature on switching kinetics is studied, showing dramatic rate enhancements in going from a glassy to a rubbery matrix. Moreover, tuning the DASA absorption profile allows for selective switching, as demonstrated by ternary photopatterning, with potential applications in rewriteable data storage.