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. Author manuscript; available in PMC: 2018 Oct 4.
Published in final edited form as: J Am Chem Soc. 2017 Sep 20;139(39):13640–13643. doi: 10.1021/jacs.7b07979

Figure 2.

Figure 2

(a) Oxygen rebound reaction for 2 with para-X-substituted trityl radicals. (b) Time-resolved UV–vis spectral changes observed upon addition of (p-tBu-C6H4)3C· (0.33 mM) to 2 (20 µM) (red line, t = 0.5 s) to form 3 (green line, t = 220 s) in toluene at 23 °C. Inset: changes in absorbance for 570 nm vs time. (c) Hammett plot and (d) Marcus plot.