Research Article

A fragmentation study of the Rhodamine 610 cation using visible-laser desorption ionization

  1. C. Y. Yang1,
  2. X. K. Hu2,
  3. A. V. Loboda2,
  4. R. H. Lipson1,*

Article first published online: 20 JUL 2010

DOI: 10.1002/jms.1779

Issue

Journal of Mass Spectrometry

Journal of Mass Spectrometry

Volume 45, Issue 8, pages 909–914, August 2010

Additional Information

How to Cite

Yang, C. Y., Hu, X. K., Loboda, A. V. and Lipson, R. H. (2010), A fragmentation study of the Rhodamine 610 cation using visible-laser desorption ionization. J. Mass Spectrom., 45: 909–914. doi: 10.1002/jms.1779

Author Information

  1. 1

    Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7

  2. 2

    MDS Analytical Technologies, 71 Four Valley Drive, Concord, Ontario, Canada L4K 2V8

*Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7.

Publication History

  1. Issue published online: 23 AUG 2010
  2. Article first published online: 20 JUL 2010
  3. Manuscript Accepted: 7 JUN 2010
  4. Manuscript Received: 25 JAN 2010

Funded by

  • Natural Sciences and Engineering Research Council of Canada (NSERC)

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Keywords:

  • cation fragmentation;
  • anion effect;
  • visible-MALDI;
  • Rhodamine dyes;
  • matrices

Abstract

The fragmentation of a potential visible matrix-assisted laser desorption ionization: Rhodamine 610 was studied under 532 nm visible irradiation, as a function of anion counter ion. It was found that at a fixed fluence, the chloride salt produced fewer fragments than those formed with ClO4− or BF4−. Evidence presented suggests that the degree of fragmentation is inversely proportional to the strength of the contact ion pair in the solid state; that is, more energy is deposited into the radical cation which can lead to fragmentation when less energy is required to separate the ion pair. Similar results were found for salts of Rhodamine 6G. Copyright © 2010 John Wiley & Sons, Ltd.

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