Tryptophan, methyl ester Singlet oxygen

Inoue, K.; Matsuura, T.; Saito, I.
Bull. Chem. Soc. Jpn. 55, 2959-2964 (1982)

Reaction: Tryptophan, methyl ester + ¹O₂^* ® products
Reference Reaction: DPBF + ¹O₂^* ®
Solvent: MeOH, 50%, H₂O, 50%

k_react = 4 × 10⁶(L mol^-1 s^-1), k_reference = 8 × 10⁸(L mol^-1 s^-1)

Experimental method: Modulated photolysis
Analytical method: vis-UV absorption
Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion. Added solute (0.3-3) × 10^-4. [Sensitizer] = 4 × 10^-6 (mol L^-1).

Inoue, K.; Matsuura, T.; Saito, I.
Bull. Chem. Soc. Jpn. 55, 2959-2964 (1982)

Reaction: Tryptophan, methyl ester + ¹O₂^* ® products and/or physical quenching
Solvent: MeOH, 50%, H₂O, 50%

k = 3.9 × 10⁷(L mol^-1 s^-1)

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

Photosensitizer = Rose Bengal dianion. used solvent k_d = 2.8 × 10⁵ s^-1. Added solute (0.3-3) × 10^-4. [Sensitizer] = 4 × 10^-6 (mol L^-1).