Tb3+ [5D4] excited state quenched by Eu3+

Tb³⁺ [⁵D₄] quenched by Eu³⁺ at conc. <= 0.5 mol L^–1
Solvent : DMSO

k_q = 1.5 x 10³(L mol^–1 s^–1)

Mechanism: energy transfer
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 2200 micro sec. (71E390)
Comments: nonlinear Stern-Volmer plot with negative deviation; quenching of an higher-excited state proposed, see Mech. [9]

Tb³⁺ [⁵D₄] quenched by Eu³⁺ at conc. <= 0.8 mol L^–1
Solvent : DMSO

k_q = 1 x 10³(L mol^–1 s^–1)

Experimental methods: steady state irradiation,
Lifetime in the absence of quencher, air free = 2200 micro sec.