Aromatic moieties in meteoritic macromolecular materials: analyses by hydrous pyrolysis and δ13C of individual compounds

Sephton, Mark A.; Pillinger, C. T.; Gilmour, I.

doi:10.1016/s0016-7037(99)00282-3

Cited by 108 publications

(105 citation statements)

References 26 publications

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“…5). This is consistent with higher content of phenols produced by pyrolysis of IOMs of CI compared to CM [54,89]. It must be noted that such process could lead to the formation of some soluble compounds [28,90].…”

Section: Diversity Among the Different Types Of Chondrites: Influencesupporting

confidence: 81%

Organic and volatile elements in the solar system

Rémusat

2011

EPJ Web of Conferences

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Abstract. Chondrites and comets have accreted primitive materials from the early solar system. Those materials include organics, water and other volatile components. The most primitive chondrites and comets have undergone few modifications on their respective parent bodies and can deliver to laboratories components that were present at the origin of the protosolar nebula. Here I present a review of the organic material and volatile components that have been studied in the most primitive chondrites, and the last data from the stardust mission about the cometary record. This paper focuses on materials that can be studied in laboratories, by mass spectrometry, ion probes or organic chemistry techniques.

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Section: Diversity Among the Different Types Of Chondrites: Influencesupporting

confidence: 81%

Organic and volatile elements in the solar system

Rémusat

2011

EPJ Web of Conferences

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“…One characteristic of parent body aqueous alteration of meteoritic organic matter appears to be a reduction in the phenol content of the pyrolyzates of more altered samples (Sephton et al 2000). Furthermore, common effects of weathering on terrestrial organic matter are well-constrained and provide clues as to what may be expected for extraterrestrial materials.…”

Section: Expected Organic Features Of Parent Body Processing and Antamentioning

confidence: 99%

“…This observation is consistent with previous pyrolysis-based work on extraterrestrial organic matter. Pyrolytically-liberated phenols appear to be the products of ether bond cleavage, and more extensively altered meteoritic organic matter is depleted in the macromolecular phenol precursors (Sephton et al 2000).…”

Section: Mössbauer Spectroscopy Of Non-antarctic and Antarctic CM Metmentioning

confidence: 99%

The preservation state of organic matter in meteorites from Antarctica

Sephton

Bland

Pillinger

et al. 2004

Meteorit & Planetary Scien

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“…Organics have been so far almost exclusively studied in CI and CM carbonaceous chondrites due to high abundance (for a review, see Pizzarello et al 2006). The combination of results from pyrolysis (Levy et al 1973;Sephton et al 2000Sephton et al , 2004Remusat et al 2005a), chemical degradation (Hayatsu et al 1980;Remusat et al 2005b), and solid-state nuclear magnetic resonance (Gardinier et al 2000;Cody and Alexander 2005) allowed the determination of key features of the molecular structure of IOM from CI and CM chondrites. It is now admitted that the IOM constitutes of rather small aromatic units, highly cross-linked with short, branched aliphatic chains.…”

Section: Introductionmentioning

confidence: 99%

Molecular study of insoluble organic matter in Kainsaz CO3 carbonaceous chondrite: Comparison with CI and CM IOM

Rémusat

Guillou

Rouzaud

et al. 2008

Meteorit & Planetary Scien

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Abstract-Kainsaz CO3 insoluble organic matter (IOM) was studied using Curie point pyrolysis, electronic paramagnetic resonance (EPR), and high-resolution transmission electron microscopy (HRTEM) to determine the effect of thermal metamorphism on molecular chondritic fingerprints. Pyrolysis released a very low amount of products that consist of one-and two-ring aromatic units with methyl, dimethyl, and ethyl substituents. Moreover, Kainsaz IOM contains two orders of magnitude fewer radicals than Orgueil, Murchison, and Tagish Lake IOM. In addition, no diradicaloids were found in Kainsaz, although they are thought to constitute a specific signature for weakly organized extraterrestrial organic compounds in contrast to terrestrial ones. HRTEM reveals a very heterogeneous structure, with microporous disordered carbon, mesoporous graphitic carbons and graphite. Graphitization likely occurs and explains the differences between Kainsaz and CI or CM IOM. Heating stress experienced by Kainsaz IOM, on the parent body and/or prior its accretion, is likely responsible for the differences in molecular and structural organizations compared with those of CI and CM IOM.

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Aromatic moieties in meteoritic macromolecular materials: analyses by hydrous pyrolysis and δ13C of individual compounds

Cited by 108 publications

References 26 publications

Organic and volatile elements in the solar system

Organic and volatile elements in the solar system

The preservation state of organic matter in meteorites from Antarctica

Molecular study of insoluble organic matter in Kainsaz CO3 carbonaceous chondrite: Comparison with CI and CM IOM

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