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. Author manuscript; available in PMC: 2008 May 12.
Published in final edited form as: Environ Sci Technol. 2008 Jan 1;42(1):166–172. doi: 10.1021/es071800d

Figure 6.

Figure 6

(A) EPR spectrum observed during 1min irradiation of RB (20 μM), TBBPA (1 mM), and DMPO (100 mM) in phosphate buffer (pH 7). The spectrum contains a triplet 2,6-dibromo-p-semiquinone radical (x, a2H = 2.4 G, 38%) and a contribution from DMPO/.OH (*, aN = 15.0 G, aH = 14.4 G, 19%). The DMPO adduct of an unknown carbon-centered radical is marked with an open circle (○, aN = 16.0 G, aH = 22.9 G, 43%). (B) Computer simulated spectrum of A.

(A) EPR spectrum observed during 1min irradiation of RB (20 μM), TBBPA (1 mM), and DMPO (100 mM) in phosphate buffer (pH 7). The spectrum contains a triplet 2,6-dibromo-p-semiquinone radical (x, a2H = 2.4 G, 27%) and a contribution from DMPO/.OH (*, aN = 15.0 G, aH = 14.4 G, 15%). The DMPO adduct of an unknown carbon-centered radical is marked with an open circle (○, aN = 15.9 G, aH = 22.9 G, 58%). (B) Computer simulated spectrum of A).