'Quenching of Excited States of Metal Complexes

Zn[5,10,15,20-tetrakis(1-methylpyridinium-3-yl)porphyrin]⁴⁺

excited state quenched by O₂

Le Roux, D.; Mialocq, J.-C.; Anitoff, O.; Folcher, G.
J. Chem. Soc., Faraday Trans. 2 80: 909-20 (1984)

Zn[5,10,15,20-tetrakis(1-methylpyridinium-3-yl)porphyrin]⁴⁺ quenched by O₂ at partial pressure 2 x 10⁴ Pa
Solvent : H₂O

k_q = 1.2 x 10⁹(L mol^–1 s^–1)

Experimental methods: laser flash, absorption, single shot signal
Lifetime in the absence of quencher, air free = 1800 micro sec.