'Quenching of Excited States of Metal Complexes

Os(5-Clphen)₃²⁺

excited state quenched by Eu²⁺

Creutz, C.; Chou, M.; Netzel, T.L.; Okumura, M.; Sutin, N.
J. Am. Chem. Soc. 102: 1309-19 (1980)

Os(5-Clphen)₃²⁺ quenched by Eu²⁺ at conc. <= 0.005 mol L^–1
Solvent : H₂O, 25ºC, pH 1.3, ionic strength 0.5 (NaCl)

k_q = 7.9 x 10⁶(L mol^–1 s^–1)

Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 0.078 micro sec.