Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 32, Pages 9224-9229Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201503609
Keywords
Archimedean polyhedra; self-assembly; shape-persistent macromolecules; supramolecular chemistry
Categories
Funding
- Division of Chemistry (CHE) of the National Science Foundation [NSF/CHE-1346572]
- Division of Materials Research (DMR) of the National Science Foundation [NSF/CHE-1346572]
- U.S. DOE [DE-AC02-06CH11357]
- National Science Foundation [CHE-1151991, CHE-1308307]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1151991] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1308307] Funding Source: National Science Foundation
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Inspiration for molecular design and construction can be derived from mathematically based structures. In the quest for new materials, the adaptation of new building blocks can lead to unexpected results. Towards these ends, the quantitative single-step self-assembly of a shape-persistent, Archimedean-based building block, which generates the largest molecular sphere (a cuboctahedron) that has been unequivocally characterized by synchrotron X-ray analysis, is described. The unique properties of this new construct give rise to a dilution-based transformation into two identical spheres (octahedra) each possessing one half of the molecular weight of the parent structure; concentration of this octahedron reconstitutes the original cuboctahedron. These chemical phenomena are reminiscent of biological fission and fusion processes. The large 6nm cage structure was further analyzed by 1D and 2D NMR spectroscopy, mass spectrometry, and collision cross-section analysis. New routes to molecular encapsulation can be envisioned.
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