Carnosine Singlet oxygen

Egorov, S.Yu.; Kurella, E.G.; Boldyrev, A.A.; Krasnovsky, A.A.,Jr.
Bioorg. Khim. 18, 142-144 (1992)

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

k = 3 × 10⁷(L mol^-1 s^-1), pH = 7

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Absolute value measured directly

Photosensitizer = Carboxyanthracene.

Dahl, T.A.; Midden, W.R.; Hartman, P.E.
Photochem. Photobiol. 47, 357-362 (1988)

Reaction: b-AlaHis + ¹O₂^* ® products
Reference Reaction: 2,5-Bis(hydroxymethyl)furan + ¹O₂^* ®
Solvent: H₂O

k/k_reference = 7.2 × 10^-1
pH = 7.0, T = 283K

Experimental method: Photolysis
Analytical method: HPLC
Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion; meas. k/k_ref = 0.72. Added solute 10^-3. [Sensitizer] = 10^-5 (mol L^-1). [Indicator] = 10^-4 (mol L^-1).

Dahl, T.A.; Midden, W.R.; Hartman, P.E.
Photochem. Photobiol. 47, 357-362 (1988)

Reaction: b-AlaHis + ¹O₂^* ® products
Reference Reaction: 2,5-Bis(hydroxymethyl)furan + ¹O₂^* ®
Solvent: H₂O

k/k_reference = 7.6 × 10^-1
pH = 7.0, T = 283K

Experimental method: Photolysis
Analytical method: HPLC
Data type: Relative value measured by steady state method

Photosensitizer = Rose Bengal dianion; meas. k/k_ref = 0.76; sensitizer immobilized on glass beads. Added solute 10^-3. [Sensitizer] = 10^-5 (mol L^-1). [Indicator] = 10^-4 (mol L^-1).