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Liquid Secondary Ion Mass Spectrometry and Collision-induced Dissociation Mass Spectrometry of Sulfonamide Derivatives of meso-Tetraphenylporphyrin

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

Corresponding author: Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal. Contract/grant sponsor: JNICT/‘Fundação para a Ciência e a Tecnologia’, Lisbon; Contract/grant number: Research Unit 62/94.

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M. GRAÇA SANTANA-MARQUES

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

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A. J. FERRRER-CORREIA

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

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AUGUSTO C. TOMÉ

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

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MARIA G. P. M. S. NEVES

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

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, and

JOSÉ A. S. CAVALEIRO

Department of Chemistry, University of Aveiro, 3810 Aveiro, Portugal

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https://doi.org/10.1002/(SICI)1099-1409(199903)3:3<172::AID-JPP118>3.0.CO;2-CCited by:6 (Source: Crossref)

Abstract

Liquid secondary ion mass spectrometry (LSIMS) and collision-induced dissociation (CID) were used for the characterization of sulfonamide derivatives of meso-tetraphenylporphyrin (TPP). The spectra obtained using LSIMS show abundant molecular ions and fragment ions from losses of the sulfonamide moieties. The main fragmentation observed in the LSI mass spectra and in the CID spectra of the protonated or cationized molecules involves the loss of one sulfonamide group. In addition, in the CID spectra of these compounds the fragment ions formed by the elimination of two, three and/or four sulfonamide groups are also observed. The CID spectra of the protonated or cationized molecules of these derivatives do not display the ions formed by the cleavage of the S-N bond which have been reported for other sulfonamide compounds. The LSI mass spectra and CID spectra of sulfonamide derivatives of meso-tetraphenylporphyrin provide an easy and reliable means of identification of the number and nature of sulfonamide groups in the porphyrinic ring.

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