摘要
利用激光溅射 分子束的技术 ,结合反射飞行时间质谱计 ,研究了Cu+、Ag+、Au+与乙硫醇的气相化学反应。结果显示这三种金属离子与 (CH3 CH2 SH) n 反应形成一系列团簇离子M+(CH3 CH2 SH) n,且团簇离子尺寸不一样。Ag+、Au+与乙硫醇的反应还生成了 (CH3 CH2 SH) +n ,由此推测Cu+、Ag+、Au+与乙硫醇团簇的反应存在两种通道 ,一种通道是生成M+(CH3 CH2 SH) n,另一种是生成 (CH3 CH2 SH) +n 。Cu+、Au+与乙硫醇的反应还生成了M+(H2 S) (M =Cu、Au) ,但是实验中没有观察到Ag+(H2 S) ,理论计算表明Ag+(H2 S)很不稳定。另外 ,分析产物离子M+(CH3 CH2 SH) n 的强度发现 ,n =1～
The gas phase reactions of Cu +?Ag +?Au + with ethanethiol have been studied by using laser ablation molecular beam method in conjunction with a reflection time of flight mass spectrometer. Different sized cluster ions M +(CH 3CH 2SH) n are formed for different metal ions and a sharp intensity deceasing appears between n=1 and 2. Another series of cluster ions (CH 3CH 2SH) + n are found for Ag + and Au +. From these results, it can be supposed that two major pathways exist in the reactions of Cu +?Ag +?Au + with ethanethiol clusters, one producing M +(CH 3CH 2SH) n , the other producing (CH 3CH 2SH) + n . In addition, very intense signals of complex ions M +(H 2S) (M=Cu?Au) are found, but no Ag +(H 2S) appears, for it is unstable based on the calculation results.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2003年第2期127-131,共5页
Journal of Atomic and Molecular Physics
基金
国家自然科学基金资助项目 (批准号 2 980 3 0 0 8)
