Evidence for polar porphyrins of bacterial and algal origin in oil shale

Conference · Tue Apr 01 04:00:00 EST 1986 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:5602566

Ocampo, R; Callot, H J; Albrecht, P

The major part of the porphyrins of the immature Messel oil shale is composed of monocarboxylic acids (C/sub 30/-C/sub 36/) essentially complexed with nickel. These acids were separated as methyl esters by reverse phase h.p.l.c. and nine components characterized by mass and NMR spectroscopy. Structural assignments were supported by synthesis of several members and nuclear Overhauser effect experiments. Besides a major component of the DPEP series, this fraction contained other members belonging to the phyllo- and etioporphyrin series, as well as to a novel chlorophyll C derived series typical of algae. Furthermore the identification of several higher homologues (C/sub 34/-C/sub 36/) of the DPEP series, structurally related to the bacteriochlorophylls, reflects the bacterial input. The characterization of a series of petroporphyrinic acids from the polar fraction of the Messel oil shale confirms the chlorophyllic (a+b,c) origin of these porphyrins. It furthermore implies that most of the characterized petroporphyrins and the survival of carboxylic functions in this class of compounds under mild diagenetic conditions. It furthermore implies that most of the characterized petroporphyrins in Messel shale originate from photosynthetic bacteria and microscopic algae.

• Research Organization: Departement de Chimie, Universite Louis Pasteur 1, rue Blaise Pascal, 67008 Strasbourg
• OSTI ID: 5602566
• Report Number(s): CONF-860425-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 31:2
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040201* -- Oil Shales & Tar Sands-- Site Geology-- (-1989)
040500 -- Oil Shales & Tar Sands-- Properties & Composition
ALGAE
BIOGEOCHEMISTRY
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHEMISTRY
COMPLEXES
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOCHEMISTRY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MASS SPECTROSCOPY
MATERIALS
NICKEL COMPLEXES
NMR SPECTRA
OIL SHALES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PLANTS
PORPHYRINS
SPECTRA
SPECTROSCOPY
TRANSITION ELEMENT COMPLEXES