Cytosine Singlet oxygen

Rougee, M.; Bensasson, R.V.
C.R. Seances Acad. Sci., Ser. II 302, 1223-1226 (1986)

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

k = < 8 × 10⁴(L mol^-1 s^-1), pH ~7, T = 293K

Experimental method: Flash photolysis
Analytical method: infrared luminescence
Data type: Limiting value
Excitation wavelength: 530 nm

Photosensitizer = 5,10,15,20-Tetrakis(4-sulfonatophenyl)porphine; No reaction at [A] = 5 × 10^-2 mol L^-1.

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

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

k = 6.8 × 10⁴(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. [Sensitizer] = 1.5 × 10^-5 (mol L^-1).