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. Author manuscript; available in PMC: 2021 Aug 14.
Published in final edited form as: J Phys Chem C Nanomater Interfaces. 2020 Dec 30;125(1):680–690. doi: 10.1021/acs.jpcc.0c10633

Figure 3:

Figure 3:

(A) Optical spectra monitoring the oxidation of TiO2/e− (0.49 mM e−) by 0.4 oxidizing equivalents of 4-MeO-TEMPO (0.19 mM). Black markers highlight the redshift in λmax in the secondary, slow absorbance increase from Amin to Afin. (B) Optical spectra following reactions of TiO2/e− (0.50 mM e−) with (top) 0.50 oxidizing equivalents KI3 (0.125 mM I2) and (bottom) ~0.50 oxidizing equivalents of O2 (0.065 mM O2). (C) Kinetic traces: Absorbance at 600 nm of a TiO2/e− colloid (0.50 mM e−) as a function of time after mixing with various oxidizing equivalents of 4-MeO-TEMPO. Absorbance is plotted versus a log time scale to show details of both the fast and slow absorbance changes.