Figure 4: Chemical states of heme molecule by binding with oxygen species.

Ultraviolet–vis spectra of heme-containing electrolytes with increasing time after the injection of KO₂ solution; (a) TEGDME+Heme (Soret band region), (b) TEGDME+Heme (Q-band region), (c) 1 M LiClO₄+TEGDME+Heme (Soret band region), (d) 1 M LiClO₄+TEGDME+Heme (Q-band region).