Journal of the American Society for Mass Spectrometry

, Volume 14, Issue 11, pp 1205–1214

Elucidation of the collision induced dissociation pathways of water and alcohol coordinated complexes containing the uranyl cation

  • Michael Van Stipdonk
  • Victor Anbalagan
  • Winnie Chien
  • Garold Gresham
  • Gary Groenewold
  • Dorothy Hanna
Articles

DOI: 10.1016/S1044-0305(03)00531-2

Cite this article as:
Van Stipdonk, M., Anbalagan, V., Chien, W. et al. J Am Soc Mass Spectrom (2003) 14: 1205. doi:10.1016/S1044-0305(03)00531-2

Abstract

Multiple-stage tandem mass spectrometry was used to characterize the dissociation pathways for complexes composed of (1) the uranyl ion, (2) nitrate or hydroxide, and (3) water or alcohol. The complex ions were derived from electrospray ionization (ESI) of solutions of uranyl nitrate in H2O or mixtures of H2O and alcohol. In general, collisional induced dissociation (CID) of the uranyl complexes resulted in elimination of coordinating water and alcohol ligands. For undercoordinated complexes containing nitrate and one or two coordinating alcohol molecules, the elimination of nitric acid was observed, leaving an ion pair composed of the uranyl cation and an alkoxide. For complexes with coordinating water molecules, MSn led to the generation of either [UO22+OH] or [UO22+NO3]. Subsequent CID of [UO22+OH] produced UO2+. The base peak in the spectrum generated by the dissociation of [UO22+NO3], however, was an H2O adduct to UO2+. The abundance of the species was greater than expected based on previous experimental measurements of the (slow) hydration rate for UO2+ when stored in the ion trap. To account for the production of the hydrated product, a reductive elimination reaction involving reactive collisions with water in the ion trap is proposed.

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© American Society for Mass Spectrometry 2003

Authors and Affiliations

  • Michael Van Stipdonk
    • 1
  • Victor Anbalagan
    • 1
  • Winnie Chien
    • 1
  • Garold Gresham
    • 2
  • Gary Groenewold
    • 2
  • Dorothy Hanna
    • 3
  1. 1.Department of ChemistrtyWichita State UniversityWichitaUSA
  2. 2.Idaho National Engineering and Environmental LaboratoryIdaho FallsUSA
  3. 3.Department of ChemistryKansas Wesleyan UniversitySalinaUSA

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