高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (4): 622.

• 研究论文 • 上一篇    下一篇

铬/磷二元团簇的形成和光解

韩春英, 邢小鹏, 高振, 朱起鹤   

  1. 中国科学院化学研究所分子反应动力学国家重点实验室, 北京 100080
  • 收稿日期:1999-12-02 出版日期:2001-04-24 发布日期:2001-04-24
  • 通讯作者: 高 振(1938年出生),男,研究员,博士生导师,从事无机团簇研究.E-mail:gaoz@mrdlab.icas.ac.cn E-mail:gaoz@mrdlab.icas.ac.cn
  • 基金资助:

    国家自然科学基金(批准号:29773054)资助

Formation and Photodissociation of Chromium/Phosphorus Binary Clusters

HAN Chun-Ying, XING Xiao-Peng, GAO Zhen, ZHU Qi-He   

  1. State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:1999-12-02 Online:2001-04-24 Published:2001-04-24

摘要: 用532nm的Nd:YAG激光直接溅射铬/磷粉末混合物样品产生铬/磷团簇,并用串级飞行时间质谱仪研究了二元团簇的组份分布及紫外激光光解规律.实验表明,铬/磷极易形成富磷的二元团簇离子,CrPm+团簇离子系列表现出明显的奇偶振荡效应,且CrP4+,CrnP8+(n=1~4),Cr4P9+,Cr5P11+,Cr6P12+和Cr8P14+等为质谱中丰度较大的离子,不随样品组成的变化而变化,光解时主要以失去中性P2和P4的方式进行解离,尝试对其电子结构进行推测.并与铬/硫二元团簇的形成和光解结果作简单对比.

关键词: 铬/磷团簇, 激光溅射, 激光光解

Abstract: Chromium/Phosphorus binary clusters were produced by direct laser ablation and analyzed by tandem time-of-flight mass spectrometer. The main clusters formed were rich in phosphorus. There is an oscillation in CrPm+ series(the peaks with even m are stronger than those with odd m, especially the peaks of CrP4+ and CrP8+ are the strongest) and this may be ascribed to the specific stability of P4 structure. There are some strong peaks such as Cr3P8+, Cr4P9+, Cr5P11+, Cr6P12+, Cr8P14+, etc., which don't change with the change of the ratios of Cr to Pin the samples, and their stability could be explained with an electron model of valence electrons filling the d orbitals of Cr. The results of photodissociation just accord with the model.

Key words: Chromium/Phosphorus clusters, Laser ablation, Laser photodissociation

中图分类号: 

TrendMD: