Zn(2,3,7,8,12,13,17,18-octaethylporphyrin) [triplet] excited state quenched by 1,4-Benzoquinone

Zn(2,3,7,8,12,13,17,18-octaethylporphyrin) [triplet] quenched by 1,4-Benzoquinone at conc. (9.5-25) x 10^–8 mol L^–1
Solvent : Toluene, –50ºC

k_q = 3.0 x 10⁹(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: laser flash, absorption,

Zn(2,3,7,8,12,13,17,18-octaethylporphyrin) [triplet] quenched by 1,4-Benzoquinone at conc. (9.5-25) x 10^–8 mol L^–1
Solvent : Toluene, –25ºC

k_q = 5.0 x 10⁹(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: laser flash, absorption,

Zn(2,3,7,8,12,13,17,18-octaethylporphyrin) [triplet] quenched by 1,4-Benzoquinone at conc. (9.5-25) x 10^–8 mol L^–1
Solvent : Toluene, 0ºC

k_q = 6.7 x 10⁹(L mol^–1 s^–1)

Mechanism: oxidative electron transfer
Experimental methods: laser flash, absorption,

Zn(2,3,7,8,12,13,17,18-octaethylporphyrin) [triplet] quenched by 1,4-Benzoquinone at conc. (9.5-25) x 10^–8 mol L^–1
Solvent : Toluene, 24ºC

k_q = 9.0 x 10⁹(L mol^–1 s^–1)
Activation energy = 9.4 (–50 to 24ºC)(kJ mol^–1)

Mechanism: oxidative electron transfer
Experimental methods: laser flash, absorption,