Nanoassembly of a fractal polymer: A molecular "Sierpinski hexagonal gasket"

Science

Volumn 312, Issue 5781, 2006, Pages 1782-1785

  Newkome, George R ^a   Wang, Pingshan ^a   Moorefield, Charles N ^a   Cho, Tae Joon ^a   Mohapatra, Prabhu P ^a   Li, Sinan ^b   Hwang, Seok Ho ^a   Lukoyanova, Olena ^c   Echegoyen, Luis ^c   Palagallo, Judith A ^b   Iancu, Violeta ^d   Hla, Saw Wai ^d  

^a UNIVERSITY OF AKRON   (United States)

^b The University of Akron   (United States)

^c CLEMSON UNIVERSITY   (United States)

^d OHIO UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FRACTALS; MACROMOLECULES; POLYMERS; SELF ASSEMBLY;

FRACTAL MACROMOLECULES; FRACTAL POLYMERS; SIERPINSKI HEXAGONAL GASKET; TERPYRIDINE;

MOLECULAR PHYSICS;

DENDRIMER; IRON; MACROCYCLIC COMPOUND; POLYMER; PORPHYRIN; RUTHENIUM;

COMPLEXATION; MOLECULAR ANALYSIS; ORGANIC NITROGEN; POLYMER;

ARTICLE; CYCLIC POTENTIOMETRY; ELECTRON MICROSCOPY; FRACTAL ANALYSIS; MACROMOLECULE; MATHEMATICS; MATRIX ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY; PRIORITY JOURNAL; SPECTROSCOPY;

EID: 33745491629     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1125894     Document Type: Article

References (24)

1. B. B. Mandelbrot, The Fractal Geometry of Nature (Freeman, San Frandsco, CA, 1982).
2. D. A. Tomalia et al., Polym. J. (Tokyo) 17, 117 (1985).
3. G. R. Newkome, Z. Yao, G. R. Baker, V. K. Gupta, J. Org. Chem. 50, 2003 (1985).
4. G. R. Newkome, C. H. MoorefieLd, F. Vögtle, Dendrimers and Dendrons: Concepts, Syntheses, Applications (Wiley-VCH, Weinheim, Germany, 2001).
5. K.-i. Sugiura, H. Tanaka, T. Matsumoto, T. Kawai, Y. Sakata, Chem. Lett. (Jpn) 1999 (no. 11), 1193 (1999).
6. M. Ascher, Am. Sci. 90, 56 (2001).
7. W. Sierpinski, Comptes Rendus (Paris) 160, 302 (1915).
8. S. R. Seidel, P. J. Stang, Acc. Chem. Res. 35, 972 (2002).
9. M. Fujita et al., Chem. Commun. 2001, 509 (2001).
10. D. L. Caulder et al., J. Am. Chem. Soc. 123, 8923 (2003).
11. J. L. Atwood, L. J. Barbour, Cryst. Growth Design 3, 3 (2003).
12. G. R. Newkome et al., Angew. Chem. Int. Ed. Engl. 38, 3717 (1999).
13. G. R. Newkome et al., Chem. Eur. J. 8, 2946 (2002).
14. P. Wang, C. N. Moorefield, G. R. Newkome, Angew. Chem. Int. Ed. Engl. 44, 1679 (2005).
15. P. Wang, C. N. Moorefield, G. R. Newkome, Org. Lett. 6, 1197 (2004).
16. E. C. Constable, A. M. W. C. Thompson, J. Chem. Soc. Chem. Commun. 1992 (no. 8), 617 (1992).
17. G. R. Newkome, T. J. Cho, C. N. Moorefield, P. P. Mohapatra, L. A. Godínez, Chem. Eur. J. 10, 1493 (2004).
18. P. S. Braterman, J.-I. Song, R. D. Peacock, Inorg. Chem. 31, 555 (1992).
19. J.-P. Sauvage et al., Chem. Rev. 94, 993 (1994).
20. P. Wang, G. R. Newkome, C. Wesdemiotis, Int. J. Mass Spectrom., 10.1016/j.ijms.2006.03.006.
21. D. E. Koppel, J. Chem. Phys. 57, 4814 (1972).
22. C. V. Nguyen et al., J. Phys. Chem. B 108, 2816 (2004).
23. K.-F. Braun, S.-W. Hla, Nano Lett. 5, 73 (2005).
24. Supported by NSF [grants DMR-0196231, DMR-0401780, CHE-0116041 (G.R.N.), and CHE-0509989 (LE.)]; the Air Force Office of Scientific Research [grant F49620-02-1-0428, 02 (G.R.N.)]; the U.S. Department of Energy [grant DE-FG02-02ER46012 (S.-W.H.); and the Ohio Board of Regents. The authors also thank S. Z. D. Cheng, B. Wang, S. F. Lyuksyutov, A. Dhinojwala, and C. Wesdemiotis from The University of Akron and M. J. Saunders from Cleveland State University for their valuable discussions about TEM, STM, AFM, and XPS measurements, as well as F. Ernst and W. D. Jennings from Case Western University for their assistance with the TEM and XPS measurements.