Bacteriochlorophyll a Singlet oxygen

Egorov, S.Yu.; Krasnovsky, A.A.,Jr.; Vychegzhanina, I.V.; Drozdova, N.N.; Krasnovskii, A.A.
Doklady Biophys. 310, 6-10 (1990)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products and/or physical quenching
Solvent: Diethyl ether

k = 2.2 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 337.1 nm

Self-sensitized.

Egorov, S.Yu.; Krasnovsky, A.A.,Jr.; Vychegzhanina, I.V.; Drozdova, N.N.; Krasnovskii, A.A.
Doklady Biophys. 310, 6-10 (1990)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products and/or physical quenching
Solvent: Pyridine

k = 5.9 × 10⁸(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 337.1 nm

Self-sensitized.

Krasnovsky, A.A.,Jr.; Vychegzhanina, I.V.; Drozdova, N.N.; Krasnovsky, A.A.
Dokl. Biophys. 283, 161-163 (1985)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products and/or physical quenching
Solvent: CCl₄

k = 9 × 10⁸(L mol^-1 s^-1), k_react = 3 × 10⁷(L mol^-1 s^-1)

Experimental method: Modulated photolysis
Analytical method: infrared luminescence
Data type: Derived from steady state measurements

Photosensitizer = 5,10,15,20-Tetraphenylporphine; used solvent k_d = 39 s^-1; Actinometer = Tetracene, k_prod = 3 × 10⁷ L(mol·s). [O₂] = O₂.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Diethyl ether

k/k_reference = 3.5 × 10^-2

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.35.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Pyridine

k/k_reference = 1 × 10^-1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.14.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Benzene

k/k_reference = 8.2 × 10^-1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.82.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Methylene chloride

k/k_reference = 1.1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 1.1.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Acetonitrile

k/k_reference = 1.0

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 1.0.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Acetone

k/k_reference = 4.1 × 10^-1

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.41.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Tetrahydrofuran

k/k_reference = 1.5 × 10^-2

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.015.

Marsh, K.L.; Connolly, J.S.
J. Photochem. 25, 183-195 (1984)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Reference Reaction: Rub + ¹O₂^* ®
Solvent: Dioxane

k/k_reference = 4.4 × 10^-2

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method
Excitation wavelength: 488 nm

Photosensitizer = Rubrene; meas. k/k_ref = 0.044.

Krasnovsky, A.A.,Jr.; Venediktov, E.A.; Cherenko, O.M.
Biophysics (Engl. Transl.) 27, 1009-1016 (1982)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products
Solvent: CCl₄

k_react = 2 × 10⁷(L mol^-1 s^-1)

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

Photosensitizer = TPP, TPBC or MP; Actinometer = Tetracene.

Krasnovsky, A.A.,Jr.
Biophysics (Engl. Transl.) 22, 960-962 (1977)

Reaction: Bacteriochlorophyll a + ¹O₂^* ® products and/or physical quenching
Solvent: CCl₄

k = 10⁹(L mol^-1 s^-1)

Experimental method: Modulated photolysis
Analytical method: infrared luminescence
Data type: Derived from steady state measurements

Photosensitizer = Protoporphyrin or Pheophytin a; used solvent k_d = 36 s^-1; also see [78KRA], [79KRA].