Imidazole Singlet oxygen

Michaeli, A.; Feitelson, J.
Photochem. Photobiol. 59, 284-289 (1994)

Reaction: Imidazole + ¹O₂^* ® products
Solvent: D₂O, 75%, EtOH, 25%

k_react = 1.4 × 10⁷(L mol^-1 s^-1), T = 295K

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

Photosensitizer = Rose Bengal dianion; Actinometer = 9,10-Dimethylanthracene; used solvent k_d = 4.8 × 10⁴ s^-1.

Michaeli, A.; Feitelson, J.
Photochem. Photobiol. 59, 284-289 (1994)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O, 75%, EtOH, 25%

k = 2.4 × 10⁷(L mol^-1 s^-1), T = 295K

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

Photosensitizer = Rose Bengal dianion.

Egorov, S.Yu.; Kurella, E.G.; Boldyrev, A.A.; Krasnovsky, A.A.,Jr.
Bioorg. Khim. 18, 142-144 (1992)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O

k = 2 × 10⁷(L mol^-1 s^-1), pH = 7

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = Carboxyanthracene.

Gottfried, V.; Kimel, S.
J. Photochem. Photobiol., B 8, 419-430 (1991)

Reaction: Imidazole + ¹O₂^* ® products
Solvent: H₂O

Activation energy = 30(kJ mol^-1), Log(A) = 12.839, Temperature range 288 to 318 K
k_react = 3.4 × 10⁷(L mol^-1 s^-1), T = 298K

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Derived from steady state measurements

Photosensitizer = 5,10,15,20-Tetrakis(4-sulfonatophenyl)porphine; used solvent k_d = 2.8 × 10⁵ s^-1; phosphate buffer contg. 1.6% NaCl.

Barboy, N.; Kraljic, I.
J. Photochem. 9, 336-337 (1978)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O

k = 3.4 × 10⁷(L mol^-1 s^-1), k_reference = 2 × 10⁸(L mol^-1 s^-1), pH = 7.0

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Relative value measured by steady state method

Photosensitizer = Hematoporphyrin IX; Quencher = Azide ion, k_q = 2 × 10⁸ L moL^-1 s^-1. Use Azide ion as quencher.

Kraljic, I.; Sharpatyi, V.A.
Photochem. Photobiol. 28, 583-586 (1978)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O

k = 4 × 10⁷(L mol^-1 s^-1), pH = 7.1, T = 298K

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Relative value measured by steady state method

Photosensitizer = Phenosafranine; Quencher = Azide ion, k_q = 2 × 10⁸ L moL^-1 s^-1. Use Azide ion as quencher.

Barboy, N.; Kraljic, I.
J. Photochem. 9, 336-337 (1978)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O (mic)

k = 2.0 × 10⁷(L mol^-1 s^-1), pH = 7.0

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Relative value measured by steady state method

Photosensitizer = Chlorophyll a; Quencher = Azide ion, k for quencher = 2 × 10⁸ L/(mol·s); 1% Triton X-100; k = 2.9 × 10⁷ and 3.9 × 10⁷ L mol^-1 s^-1 in 2% and 5% Triton X-100, resp. Use Azide ion as quencher.

Barboy, N.; Kraljic, I.
J. Photochem. 9, 336-337 (1978)

Reaction: Imidazole + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O (mic)

k = 3.6 × 10⁷(L mol^-1 s^-1), pH = 7.0

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Relative value measured by steady state method

Photosensitizer = Hematoporphyrin IX; Quencher = Azide ion, k for quencher = 2 × 10⁸ L/(mol·s); 1% Triton X-100. Use Azide ion as quencher.