Porphyrin and chlorin distributions in a Late Pliocene lacustrine sediment

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Geochimica et Cosmochimica Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(94)90159-7· OSTI ID:6590226

Kelly, B J; Harris, P G; Maxwell, J R ^[1]; Popp, B N; Hayes, J M ^[2]; Meischner, D ^[3]

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1. Univ. of Bristol (United Kingdom)
2. Indiana Univ., Bloomington, IN (United States)
3. Georg-August-Universitaet, Goettingen (Germany)

The tetrapyrroles in a highly immature Late Pliocene lacustrine sediment (Willershausen, Germany) show a simple distribution of both chlorin and porphyrin components as the free bases. The major components are C[sub 32] desoxophylloerythroaetioporphyrin (DPEP), a C[sub 33] bicycloalkano porphyrin, the chlorine analogue of the latter, and desoxophylloerythrin and its chlorin counterpart. The structure of the novel bicycloalkano chlorin was determined using a combination of two-dimensional phase-sensitive COSY NMR and nOe studies. Measurements of [delta][sup 13]C and other data indicate that DPEP and the bicycloalkano porphyrin were derived from the chlorophyll(s) of photosynthetic organisms utilizing a common source of CO[sub 2], probably diatoms. The occurrence of DPEP and other minor alkyl porphyrins indicates that the chlorophyll defunctionalization pathway leading to these components can occur at low temperature and was probably biologically mediated, as was the condensation reaction leading to the fused ring components.

• OSTI ID: 6590226
• Journal Information: Geochimica et Cosmochimica Acta; (United States), Journal Name: Geochimica et Cosmochimica Acta; (United States) Vol. 58:17; ISSN GCACAK; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ABUNDANCE
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHLORINS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORIGIN
PORPHYRINS
QUANTITATIVE CHEMICAL ANALYSIS
SEDIMENTS