Cr(4,7-Ph2phen)33+ excited state quenched by 1,2-Diaminobenzene

Cr(4,7-Ph₂phen)₃³⁺ quenched by 1,2-Diaminobenzene
Solvent : Acetonitrile, ~15ºC

k_q = 1.5 x 10¹⁰(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, absorption, multiple shot with signal averaging
Lifetime in the absence of quencher, air free = 200 micro sec.
Electron transfer fraction of quenching = 0.14