Guanosine Singlet oxygen

Devasagayam, T.P.A.; Steenken, S.; Obendorf, M.S.W.; Schulz, W.A.; Sies, H.
Biochemistry 30, 6283-6289 (1991)

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

k = 6.2 × 10⁶(L mol^-1 s^-1), pH = 7.4, T = 310K

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

Used solvent k_d = 1.9 × 10⁴ s^-1. ¹O₂* from NDPO₂.

Kraljic, I.; Sharpatyi, V.A.
Photochem. Photobiol. 28, 583-586 (1978)

Reaction: Guanosine + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O

k £ 1 × 10⁶(L mol^-1 s^-1), pH = 7.1, T = 298K

Experimental method: Photolysis
Analytical method: oxygen consumption
Data type: Limiting value

Photosensitizer = Phenosafranine; No measurable effect.

Nilsson, R.; Merkel, P.B.; Kearns, D.R.
Photochem. Photobiol. 16, 117-124 (1972)

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

k £ 1 × 10⁷(L mol^-1 s^-1)

Experimental method: Flash photolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly using indicator

Photosensitizer = Methylene Blue; Indicator = 1,3-Diphenylisobenzofuran.