The decay of β-Car•+ was
clearly accelerated by the presence of catechin anions but not by
the neutral catechins, as is seen from Figure 6. The effect on
decay is less significant than seen for anions of other polyphenols
such as puerarin and daidzein.30 The formation and decay of
β-Car•+ could, however, be accounted for by a three-exponential
expression (see Materials and Methods)