Controlling the lateral aggregation of perfluoroalkylated hexa-peri-hexabenzocoronenes
- Aebischer, Olivier F. Department of Chemistry, University of Fribourg, Switzerland
- Aebischer, Annina Department of Chemistry and Biochemistry, University of Bern, Switzerland
- Donnio, Bertrand Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Groupe des Matériaux Organiques (GMO), Strasbourg, France
- Alameddine, Bassam Department of Chemistry, University of Balamand, Tripoli, Lebanon
- Dadras, Massoud Service for Microscopy and Nanoscopy, IMT, University of Neuchâtel, Switzerland
- Güdel, Hans-Ulrich Department of Chemistry and Biochemistry, University of Bern, Switzerland
- Guillon, Daniel Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Groupe des Matériaux Organiques (GMO), Strasbourg, France
- Jenny, Titus A. Department of Chemistry, University of Fribourg, Switzerland
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25.01.2007
Published in:
- Journal of Materials Chemistry. - 2007, vol. 17, no. 13, p. 1262-1267
English
The investigation of two hexa-peri-hexabenzocoronene (HBC) derivatives carrying linear or branched perfluoroalkylated side chains is reported. Polycondensed aromatic hydrocarbons (PAH) such as HBC derivatives are well known to self-organize to form highly ordered monomolecular stacks, which in turn show a concentration- and solvent-dependent lateral aggregation. However, possible applications of self-assembled HBC derivatives require linear, laterally non-aggregated columnar structures. According to powder X-ray diffraction (XRD) and differential scanning calorimetry (DSC), HBC derivatives with linear perfluoroalkylated side chains show liquid crystalline (LC) properties whereas those with branched perfluoroalkylated side chains have an amorphous structure. The stacking behaviour and the lateral aggregation are found to be greatly influenced by changes in the medium, as shown by fluorescence spectroscopy and cryo-scanning electron microscopy (cryo-SEM).
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 7840
- DOI 10.1039/b616057c
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300309
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