Title: Shape-persistent macrocycles with intraannular polar groups: Synthesis, liquid crystallinity, and 2D organization
Authors: Fischer, M ×
Lieser, G
Rapp, A
Schnell, I
Mamdouh, W
De Feyter, Steven
De Schryver, Frans
Hoger, S #
Issue Date: Jan-2004
Publisher: Amer chemical soc
Series Title: Journal of the American Chemical Society vol:126 issue:1 pages:214-222
Abstract: The synthesis of macrocycles with intraannular polar ester groups and extraannular oligo-alkyl groups is described. The compounds exhibit stable liquid crystalline phases showing fan-shaped textures under the polarizing microscope, typical for a columnar order of the molecules. X-ray powder diffraction data of the LC phase indicate that the unit cell contains two symmetry-related units, a feature pointing most probably to a restricted rotation of the macrocycles within a stack. The X-ray data were further supported by solid-state NMR experiments, showing that the rigid core of the compounds does not rotate with kHz or higher frequencies within the column in the LC phase. Apart from the organization of the molecules in the LC phase, the 2D organization of the macrocycles at the solvent-highly oriented pyrolytic graphite (HOPG) interface was investigated and showed that these compounds are capable of nanofunctionalizing the HOPG surface in the multinanometer regime.
ISSN: 0002-7863
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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