'Quenching of Excited States of Metal Complexes

UO₂²⁺

excited state quenched by Cl^–

Yokoyama, Y.; Moriyasu, M.; Ikeda, S.
J. Inorg. Nucl. Chem. 38: 1329-33 (1976)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 25ºC, ionic strength 0 (extrap'd, HClO₄)

k_q = 1.4 x 10¹⁰(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: conventional flash, luminescence, , luminescence

Yokoyama, Y.; Moriyasu, M.; Ikeda, S.
J. Inorg. Nucl. Chem. 38: 1329-33 (1976)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 1 mol/L HClO₄, 25ºC

k_q = 1.7 x 10⁹(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: conventional flash, luminescence, , luminescence
Lifetime in the absence of quencher, unknown oxygen content = 6.8 micro sec.

Yokoyama, Y.; Moriyasu, M.; Ikeda, S.
J. Inorg. Nucl. Chem. 38: 1329-33 (1976)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 1 mol/L H₃PO₄, 25ºC

k_q = 8.0 x 10⁷(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: conventional flash, luminescence, , luminescence
Lifetime in the absence of quencher, unknown oxygen content = 190 micro sec.

Romanovskaya, G.I.; Atabekyan, L.S.; Chibisov, A.K.
Theor. Exp. Chem. 17: 221-5 (1981)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, pH 2.3, ionic strength 0.007

k_q = 2.8 x 10⁹(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air saturated = 1.5 micro sec.
Comments: S as NO₃^– salt

Moriyasu, M.; Yokoyama, Y.; Ikeda, S.
J. Inorg. Nucl. Chem. 39: 2211-4 (1977)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 0.05 mol/L HClO₄; 0.05 mol/L F^–, ionic strength 0 (extrap'd, NaClO₄)

k_q = 6.0 x 10⁷(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: conventional flash, luminescence, single shot signal
Comments: S mainly as UO₂F₂

Moriyasu, M.; Yokoyama, Y.; Ikeda, S.
J. Inorg. Nucl. Chem. 39: 2211-4 (1977)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 0.05 mol/L HClO₄; 0.05 mol/L SO₄^2–, ionic strength 0 (extrap'd, NaClO₄)

k_q = 2.0 x 10⁸(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: conventional flash, luminescence, single shot signal
Comments: S mainly as UO₂SO₄

Romanovskaya, G.I.; Atabekyan, L.S.; Chibisov, A.K.
Theor. Exp. Chem. 17: 221-5 (1981)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 1 mol/L H₃PO₄, ionic strength 0.09

k_q = 8.0 x 10⁷(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air saturated = 160 micro sec.
Comments: S as NO₃^– salt

Romanovskaya, G.I.; Atabekyan, L.S.; Chibisov, A.K.
Theor. Exp. Chem. 17: 221-5 (1981)

UO₂²⁺ quenched by Cl^–
Solvent : H₂O, 1 mol/L HNO₃, ionic strength 1

k_q = 1.4 x 10⁹(L mol^–1 s^–1)

Mechanism: reductive electron transfer
Experimental methods: laser flash, luminescence, single shot signal
Lifetime in the absence of quencher, air saturated = 2.8 micro sec.
Comments: S as NO₃^– salt

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UO22+

UO₂²⁺