A soluble C60 graphite segment

Angewandte Chemie - International Edition

Volumn 37, Issue 19, 1998, Pages 2696-2699

  Iyer, Vivekanantan S ^a   Yoshimura, Kimihiro ^a   Enkelmann, Volker ^a   Epsch, Rebekka ^b   Rabe, Jürgen P ^b   Müllen, Klaus ^a  

^a MAX PLANCK INSTITUTE FOR POLYMER RESEARCH   (Germany)

^b HUMBOLDT UNIVERSITY   (Germany)

Author keywords

Cyclodehydrogenations; Graphite segments; Nanostructures; Polycycles; Scanning tunneling microscopy

Indexed keywords

EID: 0347073711     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/(SICI)1521-3773(19981016)37:19<2696::AID-ANIE2696>3.0.CO;2-E     Document Type: Article

References (20)

1. V. S. Iyer, M. Wehmeier, J. D. Brand, M. A. Keegstra, K. Müllen, Angew. Chem. 1997, 109, 1675-1679; Angew. Chew. Int. Ed. Engl. 1997, 36, 1604-1607.
2. V. S. Iyer, M. Wehmeier, J. D. Brand, M. A. Keegstra, K. Müllen, Angew. Chem. 1997, 109, 1675-1679; Angew. Chew. Int. Ed. Engl. 1997, 36, 1604-1607.
3. M. Müller, V. S. Iyer, C. Kübel, V. Enkelmann, K. Müllen, Angew. Chem. 1997, 109, 1679-1682; Angew. Chem. Int. Ed. Engl. 1997, 36, 1607-1610.
4. M. Müller, V. S. Iyer, C. Kübel, V. Enkelmann, K. Müllen, Angew. Chem. 1997, 109, 1679-1682; Angew. Chem. Int. Ed. Engl. 1997, 36, 1607-1610.
5. A. Stabel, P. Herwig, K. Müllen, J. P. Rabe, Angew. Chem. 1995, 107, 1768-1770; Angew. Chem. Int. Ed. Engl. 1995, 34, 1609-1611.
6. A. Stabel, P. Herwig, K. Müllen, J. P. Rabe, Angew. Chem. 1995, 107, 1768-1770; Angew. Chem. Int. Ed. Engl. 1995, 34, 1609-1611.
7. E. Clar, The Aromatic Sextet, Wiley, London, 1972.
8. A graphite disc was originally believed to be a plausible structure of [60]fullerene. According to this model, it was calculated that such a stable structure would require 20 or more hydrogen atoms in the periphery: H. Kroto, Angew. Chem. 1997, 109, 1648-1664; Angew. Chem. Int. Ed. Engl. 1997, 36, 1578-1593.
9. A graphite disc was originally believed to be a plausible structure of [60]fullerene. According to this model, it was calculated that such a stable structure would require 20 or more hydrogen atoms in the periphery: H. Kroto, Angew. Chem. 1997, 109, 1648-1664; Angew. Chem. Int. Ed. Engl. 1997, 36, 1578-1593.
10. J. R. Dias, J. Chem. Inf. Comput. Sci. 1991, 31, 89-96.
11. w = 0.047. Further details on the crystal structure analysis can be obtained from the Fachinformationszentrum Karlsruhe, D-76344 Eggenstein-Leopoldshafen, Germany (fax: (+49)7247-808-666; e-mail: crysdata@fiz-karlsruhe.de), on quoting the depository number CSD-391072.
12. We thank Professor Dr. N. Karl (Universität Stuttgart) for the sublimation experiments.
13. The time delay between laser desorption and detection is on the order of microseconds. For structure elucidation of small carbon clusters, see for example H. J. Hwang, A. Van Orden, K. Tanaka, E. W. Kuo, J. R. Heath, R. J. Saykally. Mol. Phys. 1993, 79, 769-776, and references therein.
14. [2]
15. D. P. E. Smith, H. Hörber, C. Gerber, G. Binnig. Science 1989, 245, 43-45.
16. R. Lazzaroni, A. Calderone, J. L. Brédas, J. P. Rabe, J. Chem. Phys, 1997, 107, 99-105.
17. According to Figure 4a, the tunnel current through the aromatic discs of 3b, the longer axis of which is tilted with respect to the b axis of the unit cell, is higher than that through the molecules, which are oriented almost parallel to the b axis. To explain the differing contrasts, it is assumed that the aromatic discs opposite to the graphite substrate which are tilted against the b axis, are like an additional graphite layer, whereas the molecules in the other rows are rotated relative to the graphite lattice.
18. 2 (calculated from van der Waals circumferences).
19. D. Tománek, S. G. Louie, H. J. Mamin, D. W. Abraham, R. E. Thomson, E. Ganz, J. Clarke, Phys. Rev. B 1987, 35, 7790-7793.
20. Individual benzene units along the long axis of the aromatic discs could not be resolved, which is probably due to a (albeit small) molecular mobility.