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. Author manuscript; available in PMC: 2016 Mar 11.
Published in final edited form as: J Am Chem Soc. 2015 Feb 26;137(9):3330–3337. doi: 10.1021/ja512584r

Figure 4.

Figure 4

(a) Time profiles of formation of Fc*+ monitored by absorbance at 780 nm (ε = 500 M−1 cm−1) in the two-electron reduction of O2 by Fc* (2.0 mM) with Sc(OTf)3 (10 mM) catalyzed by 1 (2–10 μM) in saturated ([O2] = 11 mM) acetone at 298 K. Inset: First-order plots. (b) Plot of kobs vs [1] for the two-electron reduction of O2 by Fc* (2.0 mM) in the presence of Sc(OTf)3 (10 mM) in acetone at 298 K. (c) Plot of kobs vs [O2] for the two-electron reduction of O2 by Fc* (2.0 mM) catalyzed by 1 (2.0 μM) in saturated ([O2] = 11 mM) acetone at 298 K. (d) Plot of kobs vs [Sc(OTf)3] for the two-electron reduction of O2 by Fc* (2.0 mM) with Sc(OTf)3 (5–25 mM) catalyzed by 1 (2 μM) in saturated ([O2] = 11 mM) acetone at 298 K.