Superoxide radical anion Singlet oxygen

Mulazzani, Q.G.; D'Angelantonio, M.; Venturi, M.; Rodgers, M.A.J.
J. Phys. Chem. 95, 9605-9608 (1991)

Reaction: O₂·^- + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 2 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 355 nm

Photosensitizer = 2'-Acetonaphthone; KO₂/18-crown-6.

Mulazzani, Q.G.; D'Angelantonio, M.; Venturi, M.; Rodgers, M.A.J.
J. Phys. Chem. 95, 9605-9608 (1991)

Reaction: O₂·^- + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 2 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 532 nm

Photosensitizer = Tris(2,2'-bipyridine)ruthenium(II) ion; KO₂/18-crown-6.

Guiraud, H.J.; Foote, C.S.
J. Am. Chem. Soc. 98, 1984-1986 (1976)

Reaction: O₂·^- + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃CN

k = 7 × 10⁹(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV emission
Data type: Derived from steady state measurements using indicator

Photosensitizer = Rose Bengal dianion; Indicator = 1,3-Diphenylisobenzofuran; used solvent k_d = 3.3 × 10⁴ s^-1; tetramethylammonium superoxide.

Guiraud, H.J.; Foote, C.S.
J. Am. Chem. Soc. 98, 1984-1986 (1976)

Reaction: O₂·^- + ¹O₂^* ® products and/or physical quenching
Solvent: CH₃SOCH₃

k = 1.6 × 10⁹(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV emission
Data type: Derived from steady state measurements using indicator

Photosensitizer = Rose Bengal dianion; Indicator = 1,3-Diphenylisobenzofuran; used solvent k_d = 5.2 × 10⁴ s^-1; tetramethylammonium superoxide.

Rosenthal, I.
Isr. J. Chem. 13, 86-90 (1975)

Reaction: O₂·^- + ¹O₂^* ® products and/or physical quenching
Solvent: C₆H₅Br, 67%, CH₃CN, 33%

k = 3.6 × 10⁷(L mol^-1 s^-1)

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator

Photosensitizer = Indicator = Rubrene; used solvent k_d = 3.1 × 10⁴ s^-1; k for indicator = 4 × 10⁷ L/(mol·s); Showed quenching >> product formation; tetrabutylammonium superoxide.