Fig. 5. Effects of single R-group substitutions on tuning the redox potential and the solubility of different quinone classes. (a) Change in redox potential, ΔE 0, (c) change in solvation free energy, Δ(ΔG0solv) for only a single R-group functionalized quinones. The mean values are reported when the functional group is substituted in turn with different core hydrogens of a parent quinone. (b and d) Ranking of substituents in affecting the E 0 and ΔG0solv. The ranking is based on the efficiency of R-groups on decreasing the E 0 (b) or ΔG0solv (d). The results of the fully functionalized quinones are shown in ESI, Fig. S3.† .
