Fig. 4: Light-gated redox switching of BTX-gel.
From: Light-gated redox switching and actuation in polymer hydrogels
a Schematic depiction of the principle of light-gated oxidation of BTX-gel in water. The strong oxidant CAN can oxidize the BTX-gel in both anti- and syn-folded states. In contrast, the weaker oxidant Fe(ClO4)3 is only capable of oxidizing the BTX motifs in the syn-folded state, i.e., when the gel is irradiated, thereby enabling localized light-gated redox-switching. b UV/Vis spectra of the BTX-gel in water under different conditions, confirming the successful oxidation to BTX2+ in the presence of Fe(ClO4)3 and light.
