高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (7): 1088.

• 论文 • 上一篇    下一篇

羰基原子簇化合物M3(CO)12(M=Fe,Ru,Os)的激光解离研究

唐紫超, 黄荣彬, 陈宏, 郑兰荪   

  1. 固体表面物理化学国家重点实验室, 厦门大学化学系, 厦门 361005
  • 收稿日期:1998-07-27 出版日期:1999-07-24 发布日期:1999-07-24
  • 通讯作者: 郑兰荪
  • 作者简介:唐紫超,男,27岁,博士.
  • 基金资助:

    国家杰出青年科学基金(批准号:29425003)资助课题

Laser-induced Dissociation of Carbonyl Cluster Compounds, M3(CO)12(M=Fe,Ru,Os)

TANG Zi-Chao, HUANG Rong-Bin, CHEN Hong, ZHENG Lan-Sun    

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen, 361005
  • Received:1998-07-27 Online:1999-07-24 Published:1999-07-24

PDF (PC)

摘要： 在自制的仪器上以脉冲激光溅射铁、钌、锇的三核羰基原子簇化合物,由原位质谱观察和分析溅射产生的正负离子.比较了解离碎片及分布发现羰基锇原子簇化合物具有特殊的结构稳定性,它们不仅具有很强的金属键,而且锇与羰基分子还形成了很强的配位键.铁和钌的原子簇在解离中脱落羰基配体,碎裂成双核以至单核的碎片离子.而锇原子则先离解掉氧分子,形成新的C2桥连配体,且正、负离子质谱有显著差异,在正离子质谱中能观察到分子离子峰,而在负离子质谱中则只有解离产物.

关键词: 羰基原子簇, 激光解离, 铁, 钌, 锇

Abstract: Trinuclear carbonyl cluster compounds of Fe, Ru and Os were vaporized, ionized and dissociated by pulsed laser beam. The positive and negative ions were observed and studied by in situ mass spectroscopy. After comparison of their fragments distribution, it can be found that the osmium clusters have the special structural stability. Not only do they have the strong metal metal bonds, but also very strong coordination bonds formed between the metal-atoms and the carbonyl groups. Therefore, when the cluster dissociates, it loses a pair of oxygen atoms at first and forms a C2bridged compound, unlike the clusters of iron or ruthenium which loses the carbonyl groups and fragments into dinuclear or even single nuclear radicals. The spectra also revealed the significant difference between the positive ions and the negative ones. In the recorded mass spectra, the molecular ion peak of the positive ions can be observed, but only fragment ions of the negative ions can be observed.

Key words: Carbonyl cluster compounds, Laser dissociation, Fe, Ru, Os

中图分类号: 

TrendMD: