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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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DS: Fachverband Dünne Schichten

DS 15: Organic Thin Films, Organic-Inorganic Interfaces I (joint session DS/CPP)

DS 15.2: Talk

Tuesday, March 17, 2020, 09:45–10:00, CHE 91

Reestablishing odd-even effects in anthracene-derived monolayers by introduction of a proper symmetryChristoph Partes1, Eric Sauter2, Michael Gärtner1, Martin Kind1, Andika Asyuda2, Michael Bolte1, Andreas Terfort1, and •Michael Zharnikov21Institut für Anorganische und Analytische Chemie, Universität Frankfurt, 60438 Frankfurt, Germany — 2Angewandte Physikalische Chemie, Universität Heidelberg, 69120 Heidelberg, Germany

A series of anthracene[2,3-d]oxazolyl-2-alkylthioacetates (AOxCnSAc) with n = 2-6 methylene groups in the alkyl chain were designed and synthesized to investigate the influence of the substitution along the long axis of the molecule on the structural behavior of the respective self-assembled monolayers (SAMs) on Au(111). While in previous work anthracene-terminated alkanethiols, in which the alkyl group was attached to the off-axis 2-position of the acene, showed an exceptionally small influence of the number of methylene groups (n) in the aliphatic linker, the new system exhibits a strong dependence of almost all monolayer properties on the length of the aliphatic linker, with the parity of n being the decisive parameter - so-called odd-even effects. The high quality and well-defined character of these SAMs, along with a low band gap of only 3.0 eV, make them relevant for application in organic and molecular electronics.

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