Cr(bpy)33+ excited state quenched by Fe(C5H5)(C5H4COOH)

Cr(bpy)₃³⁺ quenched by Fe(C₅H₅)(C₅H₄COOH) at conc. < 5 x 10^–4 mol L^–1
Solvent : Acetonitrile/H₂O (2.3/1), ~15ºC

k_q = 7.3 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 = 60 micro sec.
Electron transfer fraction of quenching = 0.069