激光溅射Cu等离子体与气相CH3CN团簇的反应

用激光溅射 -分子束技术研究了Cu等离子体与乙腈团簇的气相反应 .观察到Cu+ (CH3 CN) n、CH2 CN+ (CH3 CN) n、H+ (CH3 CN) n 和CH3 CHCN+ (CH3 CN) n 四个种类的团簇离子 .考察了等离子体作用于脉冲分子束的不同位置 ,对团簇产物的种类和尺寸大小的影响 .实验结果表明 ,Cu+ (CH3 CN) n 是由Cu+ 与乙腈团簇直接缔合而成 ,CH2 CN+ (CH3 CN) n、H+ (CH3 CN) n 主要是激光等离子体中的电子与乙腈团簇碰撞电离产生的 ,而CH3 CHCN+ (CH3 CN) n 是由乙腈团簇离子内的离子 分子反应生成的 .

Reaction of the Cu Plasma with Acetonitrile Clusters

s The gas phase reaction of Cu plasma and acetonitrile clusters is studied by the laser ablation-molecular beam (LAMB) method. Four series of clustered complex ions Cu+(CH_3CN)_n, CH_2CN+(CH_3CN)_n, H+(CH_3CN)_n and CH_3CHCN+(CH_3CN)_n are observed. Interestingly, the species and sizes of the product clusters vary observably when the plasma acts on the different parts of the pulsed acetonitrile molecular beam. When the laser ablated Cu plasma acts on the head of the beam, the metal acetonitrile complex clusters Cu+(CH_3CN)n together with protonated acetonitrile clusters H+(CH_3CN)_n and deprotonated acetonitrile clusters CH_2CN+(CH_3CN)_n are domain, while the plasma acts on the middle of the beam. However, CH_2CN+(CH_3CN)_n and H+(CH_3CN)_n along with the clusters CH_3CHCN+(CH_3CN)_n turn out to be the main resulting clusters. By comparing the intensities and the cluster sizes of CH_3CHCN+(CH_3CN)_n with H+(CH_3CN)_n and CH_2CN+(CH_3CN)_n, the formation of CH_3CHCN+(CH_3CN)_n is contributed to the intracluster ion-molecule reaction of acetonitrile clusters.