Melanin (from DOPA) Singlet oxygen

Egorov, S.Yu.; Dontsov, A.E.; Krasnovsky, A.A.; Ostrovskii, M.A.
Biophysics 32, 740-742 (1987)

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

k = 1 × 10⁸(L mol^-1 s^-1), pH = 7.5-8.1

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly
Excitation wavelength: 337 nm

Photosensitizer = ?; rate per monomer unit.

Sealy, R.C.; Sarna, T.; Wanner, E.J.; Reszka, K.
Photochem. Photobiol. 40, 453-459 (1984)

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

k £ 2 × 10⁷(L mol^-1 s^-1), b = >6.7 × 10^-3(mol L^-1), pH = 7.6 ?, T = 296K

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Derived from steady state measurements
Excitation wavelength: 544 nm

Photosensitizer = Rose Bengal dianion; used solvent k_d = 1.9 × 10⁴ s^-1; based on monomer unit of MW 150. [Sensitizer] = 3.9 × 10^-5 (mol L^-1).