低能离子与生物有机小分子相互作用机制的初步研究

Study on the Action Mechanism of the Low Energy Ions Implanted in Bio - Organic Micro - Molecules

利用低能离子束(N^+,Ar^+离子)辐照固态羧酸钠(甲酸钠、乙酸钠、苯甲酸钠)和固态嘧啶碱基两类样品,经电子顺磁共振谱(EPR)、富里叶红外光谱(FT-IR)的检测,结果发现,三种低能离子辐照后的甲酸钠样品中产生了[COO]^-自由基和亚甲基(CH_2),氮离子辐照乙酸钠和苯甲酸钠样品后,形成了新的化学基团氰基(CN);同时,结合茚三酮反应,证明了辐照后的羧酸钠和碱基样品中还含有新的基团氨基(NH_2),给出了氨基的产生量与注入离子的剂量的相关曲线.

The sample of solid sodium carboxylic and three pyrimidinyls were implanted by different ions ( such asN+,H+,Ar+)of the same energy. The induced damages were detected by EPR and infrared (IR) , which showed that the CH2 group and [ COO ]'- radical ion were produced in the sodium formate sample implanted with N+ , H+ , Ar+ ions. By using highly sensitive ninhydrin reaction, it was proved that the NH2 group was produced in the three pyrimidinyls implanted with Ar+ ion beam. These results show that no matter what kinds of ions are used, new products including CH2 and [ COO ] - groups can be produced in the implanted sodium formate sample. They may form from the rearrangement reactions of the target atoms. Above results are to examine the mass and energy deposition effects of low energy ion implantation.It was found that the new CN group and the NH2 group could be produced in the implanted sodium carboxylic by N+ ion beam. It is well known that the sodium formate itself has no N atom. Therefore, the produced NH2 group and CN group must result from the mass deposition effect of the implanted N+ ion. Above results are to examine the mass and energy deposition effects of low energy ion implantation.