The IR spectrum of laboratory synthesized polymeric residues

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmochemistry, Hydrocarbons, Infrared Spectra, Interstellar Matter, Polymerization, Synthesis (Chemistry), Environmental Laboratories, Granular Materials, Interstellar Radiation, Potassium Bromides, Proton Energy, Residues, Space Environment Simulation

Scientific paper

The IR spectra of solid residues obtained by bombarding hydrocarbons frozen on KBr matrices with fast protons are presented. A common dominant IR feature near 3.4 μm resembles that observed in some astrophysical sources. These results and others obtained by bombarding C-rich mixtures suggest that the 3.4 μm feature, typical of -CH2 and -CH3 groups, is produced independently of the original hydrocarbon and of the physical conditions during the condensation.

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