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. 2014 Oct 28;19(11):17279–17304. doi: 10.3390/molecules191117279

Figure 3.

Figure 3

Experimental (black) and simulated (red) EPR spectra (SW = 8 mT) obtained upon irradiation (λmax = 365 nm; irradiance 15 mW∙cm−2; exposure 400 s) of the aerated aqueous TiO2 P25 suspensions in the presence of spin trapping agent DMPO (TiO2 concentration 0.167 mg∙mL−1, c0,DMPO = 0.035 M): (a) ordinary water; (b) water enriched with H217O (13%–17% atom.). Simulation parameters (hfcc in mT): (a) •DMPO–OH (aN = 1.497, aH = 1.477; g = 2.0057); (b) linear combination of spin-adducts, i.e., •DMPO–OH (relative concentration in %, 82) and •DMPO-17OH (aN = 1.494, aH = 1.480, a17O = 0.467; g = 2.0057; 18).