Laser Desorption Ionization Versus Electrospray Ionization Mass Spectrometry: Applications in the Analysis of Cluster Anions

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• 作者：Paul J. Dyson ; Andrew K. Hearley ; Brian F. G. Johnson ; J. Scott McIndoe and Patrick R. R. Langridge-Smith
• 关键词：mass spectrometry laser desorption ionization ; electrospray ionization ; transition metal clusters
• 刊名：Journal of Cluster Science
• 出版年：2001
• 出版时间：2001
• 年：2001
• 卷：12
• 期：1
• 页码：273-283
• 全文大小：158 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Inorganic Chemistry
  Physical Chemistry
  
• 出版者：Springer Netherlands
• ISSN：1572-8862

文摘

Mass spectra of transition metal carbonyl cluster anions were recorded using laser desorption ionization time-of-flight (LDI-TOF) and electrospray ionization (ESI) techniques. The LDI spectra generally contain peaks corresponding the intact cluster together with extensive CO loss fragments ions whereas the ESI spectra exhibit peaks corresponding the intact cluster together with few (if any) CO loss fragment ions. The parameters of both techniques can be modified to vary the extent of fragmentation. In all cases no fragmentation of the metal core is observed. Overall, ESI is a more informative method for the analysis of these types of cluster anions.