b-Tocopherol Singlet oxygen

Mukai, K.; Daifuku, K.; Okabe, K.; Tanigaki, T.; Inoue, K.
J. Org. Chem. 56, 4188-4192 (1991)

Reaction: b-Tocopherol + ¹O₂^* ® products and/or physical quenching
Solvent: EtOH

k = 1.5 × 10⁸(L mol^-1 s^-1), T = 308K

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

Indicator = 1,3-Diphenylisobenzofuran; used solvent k_d = 8.3 × 10⁴ s^-1; ¹O₂* from MNPO₂. [Indicator] = 4.3 × 10^-5 (mol L^-1).

Kaiser, S.; Di Mascio, P.; Murphy, M.E.; Sies, H.
Arch. Biochem. Biophys. 277, 101-108 (1990)

Reaction: b-Tocopherol + ¹O₂^* ® products and/or physical quenching
Solvent: CHCl₃, 50%, EtOH, 50%

k = 2.7 × 10⁸(L mol^-1 s^-1), T = 310K

Experimental method: Chemical reaction
Analytical method: infrared luminescence
Data type: Derived from steady state measurements

used solvent k_d = 1 × 10⁵ s^-1; ¹O₂* from NDPO₂.

Kaiser, S.; Di Mascio, P.; Murphy, M.E.; Sies, H.
Arch. Biochem. Biophys. 277, 101-108 (1990)

Reaction: b-Tocopherol + ¹O₂^* ® products
Solvent: CHCl₃, 50%, EtOH, 50%

k_react = 2.3 × 10⁵(L mol^-1 s^-1), T = 310K

Experimental method: Chemical reaction
Analytical method: HPLC
Data type: Derived from steady state measurements

used solvent k_d = 1 × 10⁵ s^-1; ¹O₂* from NDPO₂.

Neely, W.C.; Martin, J.M.; Barker, S.A.
Photochem. Photobiol. 48, 423-428 (1988)

Reaction: b-Tocopherol + ¹O₂^* ® products and/or physical quenching
Solvent: n-C₁₆H₃₄

k = 2.3 × 10⁷(L mol^-1 s^-1), T = 298K

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

Indicator = Rubrene; k for indicator = 7.3 × 10⁷ L/(mol·s). used solvent k_d = 9 × 10⁴ s^-1.

Grams, G.W.; Eskins, K.
Biochemistry 11, 606-608 (1972)

Reaction: b-Tocopherol + ¹O₂^* ® products and/or physical quenching
Solvent: MeOH

k = 3.6 × 10⁸(L mol^-1 s^-1), b = 2.8 × 10^-4(mol L^-1), T = 298K

Experimental method: Photolysis
Analytical method: chemical analysis
Data type: Derived from steady state measurements

Photosensitizer = Methylene Blue; used solvent k_d = 1 × 10⁵ s^-1.