摘要
将分子束流 ,激光解离和飞行时间质谱结合起来 ,在一个石英反应室内 ,让激光解离的Ni+与连续喷入的醇分子束流发生反应 ,产物经飞行时间质谱仪检测 ,研究了Ni+与C2 ～C6 等五种醇分子的气相反应。用如下的插入机理解释了反应 :( 1 )选择性的插入醇分子共价键 ;( 2 ) β H 迁移至Ni+上 ;( 3)失去一中性分子形成产物离子。
A apparatus combining molecular flows,laser ablation and time of flight mass spectrometer was first designed,in which the gas phase reactions of metal ions with organic compounds were realized.In a small quartz cell of it,laser ablated Ni + meet and react with molecular flows of alcohols,and their product ions were detected by the time of flight mass spectrometer.The gas phase reactions of Ni + with C 2—C 6 alcohols were studied.All of which can be explained by the following mechanism:(1)Insertion of Ni + into bonds of alcohols;(2)Following each insertion,a β hydrogen shift onto Ni + to produce intermediate;(3)Dessociation of each intermediate by loss of neutral molecular to give product ion.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2000年第2期237-239,共3页
Spectroscopy and Spectral Analysis
关键词
醇分子束流
飞行时间质谱
气相反应
镍离子
Laser ablation
Molecular flows of alcohols
Time of flight mass spectrometer
Gas phase reaction
