激光等离子体中超金属氧化物离子LiZnO^+的产生  

Formation of Hypermetallic Molecule LiZnO^+ from Laser Plasma

作　　者：傅正文[1] 曾宪康[2] 张谊华[2] 秦启宗[1] 陈宏[3] 黄荣彬[3] 郑兰荪[3] 

机构地区：[1]复旦大学化学系,激光化学研究所上海200433 [2]华东理工大学化学物理研究室,上海200237 [3]厦门大学固体表面物理化学国家重点实验室,厦门361005

出　　处：《高等学校化学学报》2001年第3期482-484,共3页Chemical Journal of Chinese Universities

基　　金：厦门大学固体表面物理化学国家重点实验室资助

摘　　要：By 355 nm laser ablating a composite target prepared from metallic lithium and ZnO in high vaccum, a new hypermetallic oxide LiZnO + ion, which consists of two heterometal atoms and oxygen atom, was observed by using a time of flight mass spectrometer for the first time. The time of flight positive ion mass spectra at different delay time between the accelerated electric field and laser pulse are investigated. It shows that the formation of LiOZn + depends on the delay time, and the hypervalent ion LiOZn + is observed obviously at the delay time from 7.5 to 17.5 μs. These results suggest that the ion molecular reaction between the ablated Li + ions and ZnO in the laser plasma should be responsible for the formation of hypermetallic LiZnO +.By 355 nm laser ablating a composite target prepared from metallic lithium and ZnO in high vaccum, a new hypermetallic oxide LiZnO + ion, which consists of two heterometal atoms and oxygen atom, was observed by using a time of flight mass spectrometer for the first time. The time of flight positive ion mass spectra at different delay time between the accelerated electric field and laser pulse are investigated. It shows that the formation of LiOZn + depends on the delay time, and the hypervalent ion LiOZn + is observed obviously at the delay time from 7.5 to 17.5 μs. These results suggest that the ion molecular reaction between the ablated Li + ions and ZnO in the laser plasma should be responsible for the formation of hypermetallic LiZnO +.

关 键 词：超金属分子 飞行时间质谱仪 激光等离子体 锂 锌 金属氧化物离子 产生 

分 类 号：O531[理学—等离子体物理]