Abstract
The hypothesis of organometallic chemistry between polycyclic aromatic hydrocarbons (PAHs) and metals in the interstellar medium (ISM) has been recently proposed to contribute both to the unidentified interstellar infrared (UIR) emission and to the depletion of transition metals in the ISM. Since temperature and pressure conditions of the ISM can be easily simulated by matrix isolation techniques, we have undertaken the preparation of such species through cocondensation reactions of metal atoms (iron) with some PAHs (pyrene, coronene) in low temperature argon and dinitrogen matrices. The identification of species is achieved by means of FTIR and UV-visible spectroscopies. First results show that a weak reactivity occurs between neutral species at lOK: π-complexes, hydrogen-bonded compounds, and one hydride species have been observed.
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