'Quenching of Excited States of Metal Complexes

Zn(protoporphyrin)

excited state quenched by Naphthoquinone sulfonate

Feitelson, J.; Barboy, N.
J. Phys. Chem. 90: 271-4 (1986)

Zn(protoporphyrin) quenched by Naphthoquinone sulfonate
Solvent : EtOH/H₂O (1.2/1), 0.001 mol/L Pbuf, pH 8

k_q = 8 x 10⁸(L mol^–1 s^–1)

Experimental methods: laser flash, luminescence,
Lifetime in the absence of quencher, air free = 1300 micro sec.