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

excited state quenched by EDTA
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 EDTA at conc. 0.005 mol L–1
Solvent : H2O

kq = 3.7 x 105(L mol–1 s–1)

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

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