低能氮离子对胞嘧啶水溶液损伤作用的光谱分析  

Analysis of the Spectrum of Damage Effects of Low Energy N^+ Ions on Cytosine Aqueous Solution

作　　者：石怀彬[1] 邵春林[1] 王相勤[1] 余增亮[1] 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2001年第5期644-646,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金资助 (2 9772 0 33)

摘　　要：利用N2 常压弧光放电产生低能N+,经电场加速后注入胞嘧啶 (C)水溶液 ,研究了低能N+作用后胞嘧啶水溶液的紫外及红外吸收光谱的变化。结果表明 ,低能N+对溶液样品造成了多种形式的损伤 ,形成丰富多彩的损伤产物 ,其中不仅包括水溶液中多种损伤碎片之间的重新化合 ,还包括N+与溶液中元素形成新的化学基团 ,继而与其他碎片结合形成产物 ,使外来的N+“沉积”在溶液样品中。Low energy N+ ions were produced by gas arc-discharge and the ions were accelerated into cytosine (C) aqueous solution. Changes in UV and infrared spectra of C after this kind of ions' action were investigated. UV spectra showed that absorption at 259 nm gradually decreased and lambda (max) of C solution moved toward the longer wavelength with the time. Thus, it was deduced that C was damaged and some fragments including -NO2 and -NH2 groups might have been produced. Judging from the IR spectra, the disappearance of the peak of 3005 cm(-1) confirmed the formation of -NO2 groups. All these results revealed that N+ ions caused various damages on C molecules and many new substances were formed. These new substances were not synthesized only by combination of the damage fragments in the solution, but also by 'deposition' of N+ from outside.

关 键 词：低能离子注入 弧光放电 胞嘧啶水溶液 光谱 氮离子 损伤作用 生物学 

分 类 号：Q691[生物学—生物物理学]