Analysis of chlorophyll diagenesis III. The effect of metals on the phorbide to porphyrin transition

Pamela P. Zelmer, Jumat Salimon, Eugene H. Man

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Compounds related in structure to chlorophyll, especially deoKophylloerythroetioporphyrin (DPEP) and etioporphyrin, have long been used by the petroleum industry as indicators of thermal maturity. Earlier chlorophyll diagenetic products, especially 7-ethyl-7-despropio deoxomesopyropheophorbide, have been shown to form DPEP by an aromatization reaction that is time and temperature dependent (4). Sedimentary analyses suggest that this reaction takes place between the free base forms of the chlorophyll derivatives, followed by a metalation reaction with nickel to form nickel(II) DPEP. We are using laboratory simulation studies to quantify these reactions in order to determine the parameters needed for developing a thermal modeling equation. Our studies have Jed us to conclude that in spite of what appears to be a free base reaction in sediments, that the reaction takes place by initial formation of the metallo-derivative of the phorbide, 7-ethyl-7-despropio deoxomesopyropheophorbide, which rapidly aromatizes to form metallo-DPEP. The evidence for proposing this pathway for the formation of Ni(II)DPEP is presented in this report.

Original languageEnglish
Title of host publicationGeochemical Biomarkers
PublisherTaylor and Francis
Pages293-315
Number of pages23
ISBN (Electronic)9781134332663
ISBN (Print)3718604833, 9783718604838
DOIs
Publication statusPublished - 1 Jan 2017
Externally publishedYes

Fingerprint

porphyrin
diagenesis
chlorophyll
metal
nickel
thermal maturity
petroleum industry
maturity
sediment
modeling
simulation
effect
analysis
temperature
evidence

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)
  • Social Sciences(all)

Cite this

Analysis of chlorophyll diagenesis III. The effect of metals on the phorbide to porphyrin transition. / Zelmer, Pamela P.; Salimon, Jumat; Man, Eugene H.

Geochemical Biomarkers. Taylor and Francis, 2017. p. 293-315.

Research output: Chapter in Book/Report/Conference proceedingChapter

Zelmer, Pamela P. ; Salimon, Jumat ; Man, Eugene H. / Analysis of chlorophyll diagenesis III. The effect of metals on the phorbide to porphyrin transition. Geochemical Biomarkers. Taylor and Francis, 2017. pp. 293-315
@inbook{900fc37c9ae9459da10d445653a61898,
title = "Analysis of chlorophyll diagenesis III. The effect of metals on the phorbide to porphyrin transition",
abstract = "Compounds related in structure to chlorophyll, especially deoKophylloerythroetioporphyrin (DPEP) and etioporphyrin, have long been used by the petroleum industry as indicators of thermal maturity. Earlier chlorophyll diagenetic products, especially 7-ethyl-7-despropio deoxomesopyropheophorbide, have been shown to form DPEP by an aromatization reaction that is time and temperature dependent (4). Sedimentary analyses suggest that this reaction takes place between the free base forms of the chlorophyll derivatives, followed by a metalation reaction with nickel to form nickel(II) DPEP. We are using laboratory simulation studies to quantify these reactions in order to determine the parameters needed for developing a thermal modeling equation. Our studies have Jed us to conclude that in spite of what appears to be a free base reaction in sediments, that the reaction takes place by initial formation of the metallo-derivative of the phorbide, 7-ethyl-7-despropio deoxomesopyropheophorbide, which rapidly aromatizes to form metallo-DPEP. The evidence for proposing this pathway for the formation of Ni(II)DPEP is presented in this report.",
author = "Zelmer, {Pamela P.} and Jumat Salimon and Man, {Eugene H.}",
year = "2017",
month = "1",
day = "1",
doi = "10.4324/9781315076447",
language = "English",
isbn = "3718604833",
pages = "293--315",
booktitle = "Geochemical Biomarkers",
publisher = "Taylor and Francis",

}

TY - CHAP

T1 - Analysis of chlorophyll diagenesis III. The effect of metals on the phorbide to porphyrin transition

AU - Zelmer, Pamela P.

AU - Salimon, Jumat

AU - Man, Eugene H.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Compounds related in structure to chlorophyll, especially deoKophylloerythroetioporphyrin (DPEP) and etioporphyrin, have long been used by the petroleum industry as indicators of thermal maturity. Earlier chlorophyll diagenetic products, especially 7-ethyl-7-despropio deoxomesopyropheophorbide, have been shown to form DPEP by an aromatization reaction that is time and temperature dependent (4). Sedimentary analyses suggest that this reaction takes place between the free base forms of the chlorophyll derivatives, followed by a metalation reaction with nickel to form nickel(II) DPEP. We are using laboratory simulation studies to quantify these reactions in order to determine the parameters needed for developing a thermal modeling equation. Our studies have Jed us to conclude that in spite of what appears to be a free base reaction in sediments, that the reaction takes place by initial formation of the metallo-derivative of the phorbide, 7-ethyl-7-despropio deoxomesopyropheophorbide, which rapidly aromatizes to form metallo-DPEP. The evidence for proposing this pathway for the formation of Ni(II)DPEP is presented in this report.

AB - Compounds related in structure to chlorophyll, especially deoKophylloerythroetioporphyrin (DPEP) and etioporphyrin, have long been used by the petroleum industry as indicators of thermal maturity. Earlier chlorophyll diagenetic products, especially 7-ethyl-7-despropio deoxomesopyropheophorbide, have been shown to form DPEP by an aromatization reaction that is time and temperature dependent (4). Sedimentary analyses suggest that this reaction takes place between the free base forms of the chlorophyll derivatives, followed by a metalation reaction with nickel to form nickel(II) DPEP. We are using laboratory simulation studies to quantify these reactions in order to determine the parameters needed for developing a thermal modeling equation. Our studies have Jed us to conclude that in spite of what appears to be a free base reaction in sediments, that the reaction takes place by initial formation of the metallo-derivative of the phorbide, 7-ethyl-7-despropio deoxomesopyropheophorbide, which rapidly aromatizes to form metallo-DPEP. The evidence for proposing this pathway for the formation of Ni(II)DPEP is presented in this report.

UR - http://www.scopus.com/inward/record.url?scp=85066279513&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85066279513&partnerID=8YFLogxK

U2 - 10.4324/9781315076447

DO - 10.4324/9781315076447

M3 - Chapter

SN - 3718604833

SN - 9783718604838

SP - 293

EP - 315

BT - Geochemical Biomarkers

PB - Taylor and Francis

ER -