Organometallic chemistry and the interstellar medium: experimental evidence of coordination between metal cations and polycyclic hydrocarbons in the gas phase

Details Organometallic chemistry and the interstellar medium: experimental evidence of coordination between metal cations and polycyclic hydrocarbons in the gas phase Organometallic chemistry and the interstellar medium: experimental evidence of coordination between metal cations and polycyclic hydrocarbons in the gas phase

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...285l..33b&link_type=abstract

Astronomy and Astrophysics 285L, 33-36 (1994)

Astronomy and Astrophysics

Astrophysics

14

Interstellar Chemistry, Organometallic Reactions, Polycyclic Aromatic Hydrocarbons

Scientific paper

The possible importance of organometallic chemistry in the interstellar medium (ISM) has been recently pointed out (Serra et al. 1992, Chaudret et al. 1991). However, quantitative evaluation of its implications suffers from a lack of experimental data concerning coordination complexes between polycyclic aromatic hydrocarbons (PAHs) and metals. Up to now, among the PAH family, gas phase studies of such complexes are limited to metal^+^-benzene (Hettich et al. 1986, Wiley et al. 1992) and Si^+^-naphthalene (Bohme et al. 1989). The present paper reports experimental observation of coordination between metal cations and larger PAHs. Using an ion trap, formation and destruction of Fe(PAH)^+^ and Fe(PAH)_2_^+^ complexes have been studied. These complexes are shown to be stable under collision free conditions. Orders of magnitude for the formation cross section and the dissociation barrier that can be drawn from this preliminary experiment are not in disagreement with those used in astrophysical models.

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