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Titolo:
A fast atom bombardment and matrix-assisted laser desorption/ionization mass spectrometry study of doubly charged porphyrins
Autore:
Schafer, M; Budzikiewicz, H;
Indirizzi:
Univ Cologne, Inst Organ Chem, Mass Spectrometry Facil, D-50939 Cologne, Germany Univ Cologne Cologne Germany D-50939 try Facil, D-50939 Cologne, Germany
Titolo Testata:
JOURNAL OF MASS SPECTROMETRY
fascicolo: 9, volume: 36, anno: 2001,
pagine: 1062 - 1068
SICI:
1076-5174(200109)36:9<1062:AFABAM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
TIME-OF-FLIGHT; MOLECULAR-WEIGHT COMPOUNDS; REDUCTION PROCESSES; LIQUID MATRICES; ION-SOURCE; IONIZATION; SPECTRA; SALTS; METALLOPORPHYRINS; PARAMETERS;
Keywords:
porphyrins; FAB-MS; MALDI-MS; one-electron reductions; ionization/desorption mechanism;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Schafer, M Univ Cologne, Inst Organ Chem, Mass Spectrometry Facil, Greinstr 4, D-50939 Cologne, Germany Univ Cologne Greinstr 4 Cologne Germany D-50939 logne, Germany
Citazione:
M. Schafer e H. Budzikiewicz, "A fast atom bombardment and matrix-assisted laser desorption/ionization mass spectrometry study of doubly charged porphyrins", J MASS SPEC, 36(9), 2001, pp. 1062-1068

Abstract

In this mass spectrometry (MS) study of doubly charged porphyrin salts, fast atom bombardment (FAD) and matrix-assisted laser desorption/ionization (MALDI) MS techniques are utilized to examine several unique ionic species. The predominant transformation of preformed doubly charged ions in the desorption/ionization mechanism of FAB and MALDI is the result of deprotonationreactions to form singly charged ions of the type [M2+-H+](+) and of one-electron reductions to form radical cations [M2++e(-)](+.). The dependence of this phenomenon and the formation of a number of additional ionic specieson the different matrices and the FAB-matrix additive benzoquinone is examined. The significant analogous behavior of doubly charged porphyrins in FAB- and MALDI-MS leads to the conclusion that one-electron reductions are ofdistinct relevance in the desorption/ionization mechanism of MALDI. Copyright (C) 2001 John Wiley & Sons, Ltd..

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/10/20 alle ore 07:22:09