摘要
Using the ns pulse radolysis, we studied the characteristic absorption spectrum and kinetic decay of cytosine anion radical (Cyt). Reslults showed that the characteristic absorption of Cyt’ was located at λ=355±5 nm, and decayed following the first order kinetics with T1/2=265 ns at pH=7.0. The decay,became slower and T1/2 rapidly rised with the increment of pH value, Cyt’protonated at C6 in acidic solution, and the characteristic absorption was located at λ=310±5 nm,and decayed following the second order kinetics: Cyt’ protonated at N3 in aqueous solution of pH≥7, and the characteristic absorption was located at λ=295±5 nm, and decayed following the second order kinetics.
Using the ns pulse radolysis, we studied the characteristic absorption spectrum and kinetic decay of cytosine anion radical (Cyt). Reslults showed that the characteristic absorption of Cyt' was located at λ=355±5 nm, and decayed following the first order kinetics with T1/2=265 ns at pH=7.0. The decay,became slower and T1/2 rapidly rised with the increment of pH value, Cyt'protonated at C6 in acidic solution, and the characteristic absorption was located at λ=310±5 nm,and decayed following the second order kinetics: Cyt' protonated at N3 in aqueous solution of pH≥7, and the characteristic absorption was located at λ=295±5 nm, and decayed following the second order kinetics.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1997年第9期833-837,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金
