Mass spectrometric investigation of protonated and cationized molecules of oxaalkyl phosphates

Eur. J. Mass Spectrom. 8, 451–460 (2002)
DOI: 10.1255/ejms.512

Mass spectrometric investigation of protonated and cationized molecules of oxaalkyl phosphates

Natalia Lyapchenko, Rafal Franski and Grzegorz Schroeder^*
Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland

ABSTRACT:

Mass spectrometric fragmentation pathways of protonated molecules of oxaalkyl phosphates and their complexes with alkali metal cations are discussed in this paper. Liquid secondary ion mass spectrometry (LSIMS) was used as the ionisation technique and mass spectra from B/E linked scans were registered to elucidate the mass spectrometric decomposition of the studied ions. Mainly loss of the ether molecules H₂C=HCOCH₃ and HOH₂C–H₂COCH₃ was observed. The elimination of neutrals containing metal, for example, K-CH₂CH₂OCH₃ or KOCH₂CH₂OCH₃ also occurred. In the case of phosphate (III) an unusual loss of two CH₃CH₂OCH₃ molecules and a Li or Na atom was observed. Electrospray ionisation mass spectrometry (ESIMS) was applied in order to check the ability of the studied tripodands to form complexes with alkali metal cations.

Keywords: mass spectrometry, podands, molecular channels, oxaalkyl phosphates

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