Pt(CN)42– excited state quenched by Fe(CN)63–

Pt(CN)₄^2– quenched by Fe(CN)₆^3– at conc. 0.0083 mol L^–1
Solvent : H₂O

k_q = 5.0 x 10⁷(L mol^–1 s^–1)

Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.66 micro sec. (laser flash, luminescence, single shot signal)
Comments: [S] = 0.44 mol/L, as K⁺ salt; forms oligomers