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PAHs and the Chemistry of the ISM

Published online by Cambridge University Press:  30 March 2011

C. Joblin ,
A.G.G.M. Tielens ,
V.M. Bierbaum ,
V. Le Page  and
T.P. Snow
V.M. Bierbaum
Affiliation:
Department of Chemistry & Biochemistry; University of Colorado, Boulder, CO 80309, USA
V. Le Page
Affiliation:
Department of Chemistry & Biochemistry; University of Colorado, Boulder, CO 80309, USA
T.P. Snow
Affiliation:
Department of Astrophysical & Planetary Science; University of Colorado, Boulder, CO 80309, USA

Abstract

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This review describes five categories of the reactions of polycyclic aromatichydrocarbons, including photochemistry, electron attachment/detachment, recombinationprocesses, radical reactions, and ion-neutral chemistry. For each class of reaction, anoverview of the studies and their general results are presented, as well as references tothe literature. The thermochemistry of PAHs and relevant species is described, includingbond dissociation energies, ionization energies, electron affinities, basicities,acidities, and the interrelationships of these quantities. Modeling of the chemistry ofPAHs and their ions is discussed for both diffuse and dark clouds. The role of PAH cationsin the catalytic formation of molecular hydrogen is considered. Finally, this reviewconcludes with a discussion of current challenges in the chemical characterization ofPAHs, and a perspective for future studies.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 46: PAHs and the Universe: A Symposium to Celebrate the 25thAnniversary of the PAH Hypothesis , 2011 , pp. 427 - 440
Copyright
© EAS, EDP Sciences 2011

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