Preliminary characterisation of porphyrins from the Gafsa Basin, Tunisia: Evidence for metal-free benzo porphyrins from an immature sediment
Identifieur interne : 001198 ( Main/Exploration ); précédent : 001197; suivant : 001199Preliminary characterisation of porphyrins from the Gafsa Basin, Tunisia: Evidence for metal-free benzo porphyrins from an immature sediment
Auteurs : J. Martin E. Quirke [États-Unis] ; T. Dale [États-Unis] ; Edward D. Britton [États-Unis] ; Richard A. Yost [États-Unis] ; Jean Trichet [France] ; H. Belayouni [France]Source :
- Organic Geochemistry [ 0146-6380 ] ; 1990.
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Abstract
Five metal-free porphyrin fractions were isolated chromatographically from an immature chert of the Gafsa Basin (Paleocene, Tunisia). Each fraction was analysed by electron ionisation tandem mass spectrometry. In addition to the expected aetioporphyrin-III and deoxophylloerythroetioporphyrin (DPEP), an isomeric C32 CAP porphyrin, which probably bears an extended isocyclic ring was also detected. A C31 CAP component bearing one unsubstituted β-position was isolated. C33 and C34 benzo-DPEP porphyrin as well as a C33 tetrahydrobenzo-DPEP porphyrin were also present, which indicates that such compounds are generated in immature sediments.
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DOI: 10.1016/0146-6380(90)90081-A
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Each fraction was analysed by electron ionisation tandem mass spectrometry. In addition to the expected aetioporphyrin-III and deoxophylloerythroetioporphyrin (DPEP), an isomeric C32 CAP porphyrin, which probably bears an extended isocyclic ring was also detected. A C31 CAP component bearing one unsubstituted β-position was isolated. C33 and C34 benzo-DPEP porphyrin as well as a C33 tetrahydrobenzo-DPEP porphyrin were also present, which indicates that such compounds are generated in immature sediments.</div></front></TEI><affiliations><list><country><li>France</li><li>États-Unis</li></country><region><li>Centre-Val de Loire</li><li>Floride</li><li>Région Centre</li></region><settlement><li>Orleans</li></settlement><orgName><li>Université d'Orléans</li></orgName></list><tree><country name="États-Unis"><region name="Floride"><name sortKey="Quirke, J Martin E" sort="Quirke, J Martin E" uniqKey="Quirke J" first="J. Martin E." last="Quirke">J. Martin E. 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