Figure 1.

Benchmark spectra used for computer analysis. (A) G•⁺ produced from dGuo via one-electron oxidation by Cl₂•⁻ at pD ca. 3. ¹⁴, ¹⁵ (B) C5′•, formed via photo-excitation of G•⁺ in 8-D-3′-dGMP.⁹ (C) C3′•, produced via photo-excitation of G•⁺ in dGuo.⁹ (D) C1′•, produced via photo-excitation of G•⁺ in TGT. ¹¹ (E) C1′•, produced via photo-excitation of G•⁺ in 5′-dGMP.⁹ (F) As an example of the formation of the matrix radical (Cl₂•⁻) owing to 405 nm photoexcitation of one-electron oxidized G (hole transfer to the matrix), the spectrum 4A″ is shown here. (G) Partial spectrum (220 G scan) of the total Cl₂•⁻ spectrum (1000 G scan) shown in spectrum 1(H). The scan range of Cl₂•⁻ spectrum shown in Figure 1(G) matches those of 1(A) to 1(E). (H) the Cl₂•⁻ spectrum obtained via γ-irradiation of 7.5 M LiCl/D₂O solution containing persulfate to capture electrons followed by annealing at 143 K for 20 min.¹⁸

The three reference markers (open triangles) in this Figure and in other Figures show the position of Fremy's salt resonance with the central marker at g = 2.0056. Each of these markers is separated from each other by 13.09 G.