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Citation: Ma Xian-Yong, Yao Si-De, Wang Wen-Feng, Zuo Zhi-Hua, Lin Nian-Yun. Study on Transient Products Induced by Pulse Radiolysis of Cytosine Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;1997, 13(09): 833-837. doi: 10.3866/PKU.WHXB19970912 shu

Study on Transient Products Induced by Pulse Radiolysis of Cytosine Aqueous Solution

1.
Cancer Research Institute,Hunan Medical University,Changsha 410078

Received Date: 27 December 1996
Available Online: 15 September 1997

Using the ns pulse radolysis, we studied the characteristic absorption spectrum and kinetic decay of cytosine anion radical (Cyt-). Results showed that the characteristic absorption of Cyt- was located at λ=355±5 nm, and decayed following the first order kinetics with τ1/2=265 ns at pH=7.0. The decay became slower and τ1/2 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.
- Cytosine,
- Pulse radiolysis,
- Free radical,
- Characteristic absorption
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