6-Hydroxy-2,5,7,8-tetramethylchroman-2-carboxylate ion Singlet oxygen

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

Reaction: Trolox C anion + ¹O₂^* ® products and/or physical quenching
Solvent: EtOH

k = 8.1 × 10⁷(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).

Scurlock, R.; Rougee, M.; Bensasson, R.V.
Free Radical Res. Commun. 8, 251-258 (1990)

Reaction: Trolox C anion + ¹O₂^* ® products and/or physical quenching
Solvent: CD₃OD

k = 1.2 × 10⁸(L mol^-1 s^-1), T = 293K

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

Photosensitizer = Hematoporphyrin IX. [Indicator] = 5× 10^-4-50 (mol L^-1).

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

Reaction: Trolox C anion + ¹O₂^* ® products and/or physical quenching
Solvent: D₂O, 50%, EtOH, 50%

k = 4.7 × 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.