Figure 3.

CVs of 10 mM of PEG₈–PDI in DMSO under N₂ after adding incremental amounts of KO₂ (20 μL of KO₂ in DMSO, 0.0114 mM stock) containing of 0.1 M [(n-Bu)₄N]ClO₄ as a supporting electrolyte at 298 K with a glassy carbon working electrode and platinum wire as quasi-reference electrode. Scan rate: 50 mV/s. The arrow indicates the newly formed redox peak of the molecular O₂. Color code: KO₂ concentration increased from black to red.