Cr(4,7-Ph2phen)33+ excited state quenched by 4,4'-Bis(N,N-dimethylamino)biphenyl

Cr(4,7-Ph₂phen)₃³⁺ quenched by 4,4'-Bis(N,N-dimethylamino)biphenyl
Solvent : Acetonitrile, ~15ºC

k_q = 6.7 x 10⁹(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 200 micro sec. (laser flash, absorption, multiple shot with signal averaging)
Electron transfer fraction of quenching = 0.21