Guanine Singlet oxygen

Zhang, Y.; Ma, H.; Dai, J.
Kexue Tongbao (Foreign Lang. Ed.) 31, 1065-1069 (1986)

Reaction: Guanine + ¹O₂^* ® products and/or physical quenching
Solvent: DMSO, 75%, H₂O, 25%

k = 5.0 × 10⁵(L mol^-1 s^-1), T = 298K

Experimental method: Photolysis
Analytical method: vis-UV absorption
Data type: Derived from steady state measurements using indicator
Excitation wavelength: 626 nm

Photosensitizer = Methylene Blue; Indicator = 1,3-Diphenylisobenzofuran; used solvent k_d = 1.2 × 10⁵ s^-1; k for indicator = 6.9 × 10⁸ L/(mol·s). [Sensitizer] = 1.5 × 10^-5 (mol L^-1).