Odd-even effects in supramolecular assemblies of diamide bolaamphiphiles

Johannes Schneider, Christian Messerschmidt, Andrea Schulz, Michael Gnade, Boris Schade, Peter Luger, Petra Bombicz, Vera Hubert, Jürgen Hinrich Fuhrhop

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Abstract

Bolaamphiphiles (`bolas') containing two secondary amide groups at the ends of an oligomethylene chain and two amino acid type headgroups were synthesized. The structures of crystals, of noncovalent fibers, and of surface monolayers on gold strongly depended on odd-even effects. In the crystal structures of alanine-alanine dipeptides with C11- and C12-α,ω-amino acid linkers, helical (even number of methylene groups in the chain) or sheetlike (odd) arrangements of the headgroups were found. Bolas containing two different amino acid end groups, namely, D- or L-alanine and L-lysine, connected by the same C11- and C12 linkers did not crystallize. Only the even-numbered bolas gave fibers. L- and D-configurations of alanine headgroups affected the curvature of the fibers. Diamido bolas with terminal SH-groups self-assembled on gold. Only those with even-numbered chains gave rigid monolayers. Simple stereochemical arguments concerning the fitting of amide hydrogen bond chains on both ends of the bolas are given to explain the observed differences in crystals, fibers, and monolayers.

Original languageEnglish
Pages (from-to)8575-8584
Number of pages10
JournalLangmuir
Volume16
Issue number23
DOIs
Publication statusPublished - Nov 1 2000

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Schneider, J., Messerschmidt, C., Schulz, A., Gnade, M., Schade, B., Luger, P., Bombicz, P., Hubert, V., & Fuhrhop, J. H. (2000). Odd-even effects in supramolecular assemblies of diamide bolaamphiphiles. Langmuir, 16(23), 8575-8584. https://doi.org/10.1021/la000086+