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Science 13 August 1999:
Vol. 285. no. 5430, pp. 1049 - 1052
DOI: 10.1126/science.285.5430.1049
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Reports

Controlling Molecular Self-Organization: Formation of Nanometer-Scale Spheres and Tubules

G. William Orr, Leonard J. Barbour, Jerry L. Atwood *

Amphiphilic polyhedron-shaped p-sulfonatocalix[4]arene building blocks, which have been previously shown to assemble into bilayers in an antiparallel fashion, have been assembled in a parallel alignment into spherical and helical tubular structures by the addition of pyridine N-oxide and lanthanide ions. Crystallographic studies revealed how metal ion coordination and substrate recognition direct the formation of these supramolecular assemblies. The addition of greater amounts of pyridine N-oxide changed the curvature of the assembling surface and resulted in the formation of extended tubules.

Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.
*   To whom correspondence should be addressed. E-mail: AtwoodJ{at}missouri.edu

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Supramolecular Chemistry And Self-assembly Special Feature: Organization of the interior of molecular capsules by hydrogen bonding.
J. L. Atwood, L. J. Barbour, and A. Jerga (2002)
PNAS 99, 4837-4841
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