Cr(CN)63– excited state quenched by O2

Cr(CN)₆^3– quenched by O₂ at conc. 0.0012 mol L^–1
Solvent : DMF, 22ºC

k_q = 1.7 x 10⁶(L mol^–1 s^–1)

Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 6500 micro sec.
Comments: tau₀ at 25 ºC