低能氮离子注入乙醇重水溶液的GC-MS分析

将氮气常压弧光放电产生的N⁺在放电间隙电场的加速下“注入”到乙醇的重水溶液中,利用气相色谱-质谱(GC-MS)分析样品,证实有氘代产物(DCH₂CH₂OH)和羟基取代产物(DOCH₂CH₂OH)生成,这表明低能N⁺诱发水溶液中的反应与水分子分解产生的自由基有关.同时,产物中还检测到乙酸(CH₃COOD )和氨基乙醇(HOCH₂CH₂ND₂),说明反应是在氧化性氛围中进行的,而这种氧化作用可能亦与水分子分解产生的氢氧根自由基有关.氨基乙醇则可能是氮离子俘获重水中的氘形成氨基继而与乙醇反应生成的,这也是氮“沉积”在溶液中的重要形式.这些结果对初步揭示低能离子与水溶液体系反应的机理具有一定的意义.

GC-MS Analysis of Ethanol Solution with D2O as Solvent Implanted by Low Energy N+

Low energy ions were produced by N₂ glow-discharge. The positive ones were accelerated into ethanol solution with D₂O as solvent to induce chemical reactions. GC-MSanalysis showed that DCH₂CH₂OH, HOCH₂CH₂OD were produced by such kind of implantation. Thus, it was proved that the reaction was mainly caused by radicals generated by decomposition of water molecules, D^· and ^·OD played an important role in the process. Meanwhile, CH₃COOD and HOCH₂CH₂ND₂ were also found in the products, so it was concluded that the reaction was carried out under an oxidative atmosphere, which was thought to be probably related to ^·OD radicals, too. The capture of Dfrom D₂O by N⁺ to form ^·ND₂ radicals was not only an initial step to produce HOCH₂CH₂ND₂ but also served as a probable pattern for "nitrogen deposition". All these are helpful to reveal the mechanism of the reaction induced by low energy N⁺ implanting into solution samples.