IR spectroscopic characterization of SAMs made from a homologous series of pyridine disulfides

  • chair:

    Liu, J. /  Stratmann, L. / Krakert, S. / M. Kind, M. / Olbrich, F. / Terfort, A. / Wöll, Ch. (2009)
  • place:

    J. El. Spec. and Rel. Phen. 172 (2009), 120–127
  • Date: 2009

  • Liu, J. /  Stratmann, L. / Krakert, S. / M. Kind, M. / Olbrich, F. / Terfort, A. / Wöll, Ch. (2009): „IR spectroscopic characterization of SAMs made from a homologous series of pyridine disulfides“. In: J. El. Spec. and Rel. Phen. 172 (2009), 120–127

Abstract

A homologous series of pyridine-terminated organic disulfides has been used to prepare self-assembled monolayers (SAMs) of the corresponding thiolates on Au substrates. A characterization using IR spectroscopy reveals surprisingly large differences between the members of the homologous series.

We find a strong evidence for partial protonation of the pyridine-terminated organic surfaces exposed by the corresponding SAMs in particular in the case where the SH-group is directly attached to the pyridine ring. The assignment of the vibrational frequencies is based on ab initio calculations for the investigated thiol monomers.

 

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