Imperial College London
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ProfessorMarkSephton

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Organic Geochemistry
 
 
 
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Contact

 

+44 (0)20 7594 6542m.a.sephton Website

 
 
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Location

 

2.34Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Potiszil:2017:10.1021/acsearthspacechem.7b00053,
author = {Potiszil, C and Montgomery, W and Sephton, MA},
doi = {10.1021/acsearthspacechem.7b00053},
journal = {ACS Earth and Space Chemistry},
pages = {475--482},
title = {The Effects of Pressure on Model Compounds of Meteorite Organic Matter},
url = {http://dx.doi.org/10.1021/acsearthspacechem.7b00053},
volume = {1},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Extraterrestrial organic matter has been widely studied; however, its response to pressure has not. Primitive organic matter bearing meteorites, such as CI and CM carbonaceous chondrites, have experienced variable pressures, up to 10 GPa. To appreciate the effects of these pressures on the organic content of these bodies, the model compounds isophthalic acid, vanillin and vanillic acid were subjected to pressures of up to 11.5 GPa and subsequently decompressed. High resolution synchrotron source Fourier Transform Infrared (FTIR) was used to determine the effects of different benzene substituents at high pressure on both the vibrational assignments of the benzene core of the molecules and the ability of the aromatic compounds to form intermolecular hydrogen bonds. The presence of additional peaks at high pressure was found to coincide with molecules that contain carboxyl groups, these features are interpreted as C-H---O intermolecular hydrogen bonds. The formation of these hydrogen bonds has implications for the origination of macromolecular organic matter (MOM), owing to the importance of such attractive forces during episodes of cross linking, such as esterification. Pressure-induced hydrogen bond formation is a process by which aromatic MOM precursors could have cross linked to generate the organic polymers found within extraterrestrial bodies today.
AU  - Potiszil,C
AU  - Montgomery,W
AU  - Sephton,MA
DO  - 10.1021/acsearthspacechem.7b00053
EP  - 482
PY  - 2017///
SN  - 2472-3452
SP  - 475
TI  - The Effects of Pressure on Model Compounds of Meteorite Organic Matter
T2  - ACS Earth and Space Chemistry
UR  - http://dx.doi.org/10.1021/acsearthspacechem.7b00053
UR  - http://hdl.handle.net/10044/1/50504
VL  - 1
ER  -
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