Investigation of the reactivity of hydrated electron toward perfluorinated carboxylates by laser flash photolysis

Laser flash photolysis technique was employed to investigate the reactivity of hydrated electron ( e aq - ) toward a series of perfluorinated carboxylates, CnF2n+1COO− (n = 1, 3, 7), at 288 ± 1 K in aqueous phase. It was demonstrated that the length of –CnF2n+1 group exerted substantial influence on the rate constant. The second-order rate constants for e aq - with CF3COO−, C3F7COO−, C7F15COO− were estimated to be (1.9 ± 0.2) × 106 M−1 s−1 (μ = 0), (7.1 ± 0.3) × 106 M−1 s−1 (μ = 0) and (1.7 ± 0.5) × 107 M−1 s−1 (μ = 0.01 M), respectively.