2-Methyl-6-(4-methoxyphenyl)imidazo[1,2-a]pyrazin-3-one Singlet oxygen

Mashiko, S.; Ashino, T.; Mizumoto, I.; Suzuki, N.; Nakano, M.; Goto, T.; Inaba, H.
Photomed. Photobiol. 11, 191-194 (1989)

Reaction: 2-Methyl-6-(4-methoxyphenyl)imidazo[1,2-a]pyrazin-3-one + ¹O₂^* ® products and/or physical quenching
Solvent: H₂O

k = 2.9 × 10⁹(L mol^-1 s^-1), pH = 5.4

Experimental method: Photolysis
Analytical method: infrared luminescence
Data type: Derived from steady state measurements
Excitation wavelength: 514.5 nm

Photosensitizer = Rose Bengal dianion; used solvent k_d = 2.4 × 10⁵ s^-1; see also [91MAS/SUZ]. [Sensitizer] = 2.0 × 10^-5 (mol L^-1).