The reaction between catechin anions and β-Car•+ was
accordingly studied using laser flash photolysis with transient
absorption detection. β-Car•+ was generated by photoexcitation
(532 nm) in the electron-withdrawing methanol/chloroform
(1:9 v/v) binary solvent. The formation and decay of β-Car•+
and the bleaching and regeneration of β-Car were followed
at 950 and 500 nm, respectively, on a millisecond time scale in
the absence or presence of each of catechin monoanions in