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Table 2 Different auxochromes on benzenes whether owning the capabilities to be electron shuttles

From: Polyphenolic compounds as electron shuttles for sustainable energy utilization

AuxochromeElectron-mediating capabilitiesa
Hydroxyl group, –OH+
Amino group, –NH2+
Sulfhydryl group, –SH
Methoxy group, –OCH3
Carboxyl group, –COOH
Sulfo group, –SO3H
  1. a+: with redox peaks on CV profile; : without redox peaks on CV profile (cited from [26])