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Liquid secondary ion mass spectrometry of porphyrin dimers: reduction reactions and structural characterisation
Author(s) -
Domingues M. Rosário M.,
SantanaMarques M. Graça O.,
Domingues Pedro,
Faustino M. A.,
Neves Maria G. P. M. S.,
Cavaleiro José A. S.,
FerrerCorreia A. J.
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/1097-0231(20001115)14:21<2025::aid-rcm127>3.0.co;2-w
Subject(s) - chemistry , porphyrin , dimer , fragmentation (computing) , amide , mass spectrometry , monomer , secondary ion mass spectrometry , ion , photochemistry , organic chemistry , chromatography , polymer , computer science , operating system
New synthesised porphyrin dimers, with an amide or ester linkage between the two porphyrin units, were studied using liquid secondary ion mass spectrometry (LSIMS). The formation of reduced species was observed for all the compounds and it was found that the extent of reduction is dependent on the matrix used and on the structure of the porphyrin dimer. The main fragmentation pathways lead to monomer fragments resulting from cleavage of the amide or ester linkage between the two porphyrin units. The consistency of the fragmentations for all the dimers studied leads to the proposal of a common designation for the fragment ions. LSIMS, in addition to molecular weight determination, can provide important structural information for this type of compound. Copyright © 2000 John Wiley & Sons, Ltd.