Cr(4,7-Ph2phen)33+ excited state quenched by 3,3'-Dimethyl-4,4'-diaminobiphenyl

Cr(4,7-Ph₂phen)₃³⁺ quenched by 3,3'-Dimethyl-4,4'-diaminobiphenyl
Solvent : Acetonitrile, ~15ºC

k_q = 6.6 x 10⁹(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 = 0.11