Computer Science
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004m%26ps...39.1649b&link_type=abstract
Meteoritics & Planetary Science, Vol. 39, No. 10, p.1649-1654
Computer Science
9
Scientific paper
The radicals in the insoluble organic matter (IOM) from the Tagish Lake meteorites were studied by electron paramagnetic resonance and compared to those existing in the Orgueil and Murchison meteorites. As in the Orgueil and Murchison meteorites, the radicals in the Tagish Lake meteorite are heterogeneously distributed and comprise a substantial amount (~42%) of species with a thermally acessible triplet state and with the same singlet-triplet gap, ?E ??0.1 eV, as in the Orgueil and Murchison meteorites. These species were identified as diradicaloid moieties. The existence of similar diradicaloid moieties in three different carbonaceous chondrites but not in terrestrial IOM strongly suggests that these moieties could be "fingerprints" of the extraterrestrial origin of meteoritic IOM and markers of its synthetic pathway before its inclusion into a parent body.
Becker Lee
Binet Laurent
Derenne Sylvie
Gourier Didier
Pizzarello Sandra
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