'Quenching of Excited States of Metal Complexes

Zn(etioporphyrin I) [singlet]

excited state quenched by Nitrobenzene

Whitten, D.G.; Lopp, I.G.; Wildes, P.D.
J. Am. Chem. Soc. 90: 7196-200 (1968)

Zn(etioporphyrin I) [singlet] quenched by Nitrobenzene
Solvent : Benzene

k_q = 3.4 x 10⁹(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.0043 micro sec. ()

Whitten, D.G.; Lopp, I.G.; Wildes, P.D.
J. Am. Chem. Soc. 90: 7196-200 (1968)

Zn(etioporphyrin I) [singlet] quenched by Nitrobenzene
Solvent : Benzene, 1 mol/L PPh₃

k_q = 2.8 x 10⁹(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.0043 micro sec. ()
Comments: S partially bound to PPh₃

Whitten, D.G.; Lopp, I.G.; Wildes, P.D.
J. Am. Chem. Soc. 90: 7196-200 (1968)

Zn(etioporphyrin I) [singlet] quenched by Nitrobenzene at conc. <= 0.20 mol L^–1
Solvent : EtOH

k_q = 7.3 x 10⁹(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.0043 micro sec. ()

Whitten, D.G.; Lopp, I.G.; Wildes, P.D.
J. Am. Chem. Soc. 90: 7196-200 (1968)

Zn(etioporphyrin I) [singlet] quenched by Nitrobenzene
Solvent : MeCH

k_q = 4.8 x 10⁹(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.0043 micro sec. ()

Whitten, D.G.; Lopp, I.G.; Wildes, P.D.
J. Am. Chem. Soc. 90: 7196-200 (1968)

Zn(etioporphyrin I) [singlet] quenched by Nitrobenzene at conc. <= 0.20 mol L^–1
Solvent : Piperidine

k_q = 3.4 x 10⁹(L mol^–1 s^–1)

Mechanism: exciplex formation
Experimental methods: steady state irradiation, luminescence
Lifetime in the absence of quencher, air free = 0.0043 micro sec. ()

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