Prof. Jay S. Siegel (Universität Zürich, Švýcarsko)
Novel Aromatics as the Core of Nano-Scale Materials
Abstrakt
The formula C10nH10 includes a series of bowl-shaped carbon-rich structures where in corannulene (1) represents n=2, and the simplest capped nanotube, C40H10 (2), represents n=4.1 Derivatives of class n=2 continue to lead to many interesting materials.2 The class of n=4 is also represented by an isomeric structure of 2, decaethynylcorannulene (3). A simple bond energy estimate for the energetics of 3 compared to 2 results in a remarkable value of 300-400 kcal/mol in favor of 2, and could lead one to question the feasibility for 3 to be isolated as an inert material. From decachlorocorannulene (4), decapentynylcorannulene (5) can be prepared with the hope of making decapropyl-2 (6). Such an approach would open a solution phase method to the synthesis of mono-disperse single-walled carbon nanotubes.3 At the same time, corannulene mono-layers on metals reveal new surface phenomena regarding molecular organization and polymorphism.4 Sym-pentakisarylalkynylcorannulenes offer a different type of materials application in the area of oriented solids and liquid crystals with efficient fluorescence activity.5
Zdroje
- Baldridge, K. K.; Siegel, J. S. Theoret. Chem. Acc. 1997, 97, 67.
- Wu, Y.-T.; Siegel, J. S. Chem. Rev. 2006, 106, 4843.
- Hayama, T.; Wu, Y.-T. Linden, A.; Baldridge, K. K.; Siegel, J. S. J. Am. Chem Soc. 2007, 129, 12612.
- Parschau, M.; Fasel, R.; Ernst, K.-H.; Gröning, O.; Brandenberger, L.; Schillinger, R.; Greber, T.; Seitsonen, A. P.; Wu, Y.-T.; Siegel, J. S. Angew. Chem. Int. Ed. 2007, 46, 8258.
- Wu, Y.-T.; Bandera, D.; Maag, R.; Linden, A.; Baldridge, K. K.; Siegel, J. S. J. Am. Chem. Soc. 2008 in press.
