'Quenching of Excited States of Metal Complexes

Pd(2,3,7,8,12,13,17,18-octaethylporphyrin)

excited state quenched by cis-Stilbene

Mercer-Smith, J.A.; Whitten, D.G.
J. Am. Chem. Soc. 100: 2620-5 (1978)

Pd(2,3,7,8,12,13,17,18-octaethylporphyrin) quenched by cis-Stilbene
Solvent : Benzene

k_q = 1.4 x 10⁶(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 500 micro sec. (conventional flash, luminescence, single shot signal)

Mercer-Smith, J.A.; Whitten, D.G.
J. Am. Chem. Soc. 100: 2620-5 (1978)

Pd(2,3,7,8,12,13,17,18-octaethylporphyrin) quenched by cis-Stilbene
Solvent : Pentane

k_q = 3.3 x 10⁶(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 555 micro sec. (conventional flash, luminescence, single shot signal)

back...