'Quenching of Excited States of Metal Complexes

Tb³⁺ [⁵D₄]

excited state quenched by SO₂

Kazakov, V.P.; Bulgakov, R.G.
Opt. Spectrosc. (USSR) 43: 639-42 (1977)

Tb³⁺ [⁵D₄] quenched by SO₂
Solvent : H₂SO₄ (98%), 75ºC

k_q = 6.2 x 10³(L mol^–1 s^–1)
Activation energy = 63 (30-75ºC)(kJ mol^–1)

Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = ~250 micro sec. (60E011)