Autocatalytic Dissociative Adsorption of Imidazole on the Ge(100)-2 x 1 Surface

초록

The adsorption of imidazole on the Ge(100)-2 X 1 surface is studied with ultrahigh vacuum infrared spectroscopy experiments and density functional theory calculations. Imidazole datively bonds to the surface through its pyridinic nitrogen at low coverage, while dissociation of the pyrrolic N-H is observed upon larger exposure. The coverage-dependent change in the product distribution-is explained by autocatalytic activation of the dissociative adsorption via interaction between adjacent imidazole adsorbates. These results suggest an alternative explanation for the previously studied adsorption chemistry of bifunctional ethylenediamine on Ge(100)-2 X 1.

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