Optical Spectroscopy of Radiation Processed Cosmic Ices & PAH-doped Water-rich Ices (Facile Generation & Storage of PAH-Ions in H2O Ices)

Details Optical Spectroscopy of Radiation Processed Cosmic Ices & PAH-doped Water-rich Ices (Facile Generation & Storage of PAH-Ions in H2O Ices) Optical Spectroscopy of Radiation Processed Cosmic Ices & PAH-doped Water-rich Ices (Facile Generation & Storage of PAH-Ions in H2O Ices)

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003dps....35.1610g&link_type=abstract

American Astronomical Society, DPS meeting #35, #16.10; Bulletin of the American Astronomical Society, Vol. 35, p.1484

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Water-rich ices, which harbor a wide variety of organic and inorganic species, are common throughout the Solar System and interstellar molecular clouds. Chemical reactions induced within these cosmic ices by high-energy photons and cosmic rays, as well as thermal cycling, play a vital role in the chemical evolution of these icy objects. Recent laboratory studies show that complex organic molecules are generated in these simple cosmic ice analogs upon energetic processing, including amino acids amphiphillic molecules -- the fundamental building the blocks of life.
We have discovered that energetic processing of cryogenic water-rich ices containing organic molecules such as polycyclic aromatic hydrocarbons (PAHs) below 50 K produce high-energy species such as radical ions. These ions absorb in the visible-near infrared region, resulting strong coloration. Upon thermal cycling these ions react with the water resulting in oxygenated organic molecules.
Applications of our laboratory findings to Planetary Ices will be presented.

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