Pd(2,3,7,8,12,13,17,18-octaethylporphyrin) excited state quenched by cis-alpha-Methylstilbene

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

k_q = 2.0 x 10⁵(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)
Comments: k_q = 9.7 x 10⁴ with conventional flash/luminescence/single shot signal