The photochemical products of benzene in Titan’s upper atmosphere

Details The photochemical products of benzene in Titan’s upper atmosphere The photochemical products of benzene in Titan’s upper atmosphere

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010icar..207..477d&link_type=abstract

Icarus, Volume 207, Issue 1, p. 477-484.

Computer Science

2

Scientific paper

The Cassini spacecraft detected benzene high in Titan’s atmosphere as well as the presence of large mass positive and negative ions. Previous work has suggested that these large mass ions could be composed of fused-ring polycyclic aromatic hydrocarbon compounds. These fused-ring PAHs, such as naphthalene and anthracene, are usually the result of high temperature processes that may not occur in Titan’s thin, cold, upper thermosphere. Here we suggest that a different class of aromatic compounds, polyphenyls, may be a better explanation of the data. Polyphenyls can grow to be large polymeric structures and could condense to form the aerosols seen in Titan’s cloud and hazes. They have similar properties to fused-ring PAHs (for example, electron affinity, ionization potential) and could be the negative ion species seen in the CAPS instrument data from the Cassini spacecraft.

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