JWST spectra of two PDRs show aliphatic carbon bonds are destroyed at cloud surfaces while aromatic bonds survive, and deuterium substitution is more efficient in aliphatic than aromatic carbon bonds.
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JWST Observations of Photo-dissociation Regions. II. Aliphatic/Aromatic Carbonaceous Dust, Ices, and Gas Phase Spectral Line Inventory
JWST spectra of two PDRs show aliphatic carbon bonds are destroyed at cloud surfaces while aromatic bonds survive, and deuterium substitution is more efficient in aliphatic than aromatic carbon bonds.