Figure 3 a) UV-Vis reduction titration of 0.041mM MnIII-3 with ascorbic acid, recorded in PBS (25 ºC, pH = 7.4). Number of equivalents of ascorbic acid added: (black line) - 0; (red line) – 0.28; (light blue line) – 0.57; (light green line) – 0.85; (pink line) – 6.4; (dark green) – 11.4; (dark blue) – 25.3; b) UV-Vis spectra of the reoxidation of MnII-3 upon air exposure: (black line) – MnII-3 before exposure; (red line) – after 10 min. exposure; (blue line) after 4h exposure; (green line) complete conversion to MnIII-3 (after 24h exposure). c) UV-Vis reduction titration of 0.041mM MnIII-3 with , recorded in PBS (25 ºC, pH = 7.4). Number of equivalents of added: (black line) - 0; (red line) – 0.43; (light blue line) – 2.32; (light green line) – 7.94; (pink line) – 23.5; (dark green) – 48; d) UV-Vis spectra of the reoxidation of MnII-3 upon air
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