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利用脉冲等离子体反应器 ,采用 C2 H2 /Ar,CH4 /Ar,C6H6/Ar放电合成碳簇分子和离子 .采用 TOF-飞行时间质谱和激光电离技术来研究和分析产物分布 .讨论了在不同实验条件下 ,中性碳簇分子和离子的分布情况 ,并对反应过程和机理进行了讨论 .从反应机理来看 ,在相似的等离子条件下 ,采用不同的气体 ,如 C2 H2 /Ar,CH4 /Ar,C6H6/Ar等所得到碳簇分布非常相似 .另外 ,当增加等离子体反应器通道长度 (增大反应时间 ) ,碳簇的尺寸也有增加的趋势 .即较大的碳簇需要较多的反应步骤和较长的反应时间 .这表明 ,合成机理主要是碳原子分步加成
The pulsed plasma reactor was used to synthesize carbon cluster molecules and ions with C2H2 / Ar, CH4 / Ar and C6H6 / Ar discharges.The product distribution was studied and analyzed by TOF-TOF-MS and laser ionization techniques. Under the similar plasma conditions, using different gases, such as C2H2 / Ar, CH4 / C2H4, Ar, C6H6 / Ar etc. The distributions of carbon clusters are very similar.In addition, the size of the carbon clusters also tends to increase as the length of the plasma reactor is increased (the reaction time is increased), ie, larger carbon clusters need more Reaction steps and longer reaction time.This shows that the synthesis mechanism is mainly carbon stepwise addition