Pt(CN)42– excited state quenched by Eu3+

Pt(CN)₄^2– quenched by Eu³⁺ at conc. 0.0040-0.0060 mol L^–1
Solvent : H₂O, 24ºC

k_q = 2.1 x 10⁹(L mol^–1 s^–1)

Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.45 micro sec. (laser flash, luminescence, single shot signal)
Comments: [S] = 0.092 mol/L, as Ba²⁺ salt; forms oligomers