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

被引：0

作者：

Ma Xianyong ^{[1
]}

Yao Side ^{[2
]}

Wang Wenfeng ^{[2
]}

Zuo Zhihua ^{[2
]}

Liu Nianyun ^{[2
]}

机构：

[1] Hunan Med Univ, Inst Canc Res, Changsha 410078, Hunan, Peoples R China

[2] Acad Sinica, Lab Radiat Chem, Shanghai Inst Nucl Res, Shanghai 201800, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 1997年 / 13卷 / 09期

关键词：

Cytosine; Pulse radiolysis; Free radical; Characteristic absorption;

D O I：

10.3866/PKU.WHXB19970912

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using the us pulse radiolysis 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 lambda=355+/-5 nm, and decayed following the first order kinetics with tau(1/2)=265 ns at pH=7.0. The decay because slower and tau(1/2) rapidly rised with the increment of pH value, Cyt(-). protonated at C-6 in acidic solution, and the characteristic absorption was located at lambda=310+/-5 nm, and decayed following thy second order kinetics Cyt(-) protomited at N-3 in aqueous solution of pH >= 7, and the characteristic absorption was located at lambda=295+/-5 nm, and decayed following the second order kinetics.

引用

页码：833 / 837

页数：5

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