Cr(5-Clphen)33+ excited state quenched by Cr(5-Clphen)33+

Cr(5-Clphen)₃³⁺ quenched by Cr(5-Clphen)₃³⁺
Solvent : H₂O, 1 mol/L HCl, 22ºC

k_q = 1.7 x 10⁷(L mol^–1 s^–1)

Mechanism: collisional deactivation
Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 180 micro sec.
Comments: [Q] = [S] <= 0.0013 mol/L; tau₀ extrap'd to [S] = 0

Cr(5-Clphen)₃³⁺ quenched by Cr(5-Clphen)₃³⁺
Solvent : H₂O, 1 mol/L NaCl, BRbuf, 22ºC, pH 9.5

k_q = 3.5 x 10⁷(L mol^–1 s^–1)

Mechanism: collisional deactivation
Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air free = 150 micro sec.
Comments: tau₀ extrap'd to [S] = 0; same k_q with steady state irradiation/quantum yield of a photoproduct, see Mech. [5]