期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 32, 页码 9224-9229出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201503609
关键词
Archimedean polyhedra; self-assembly; shape-persistent macromolecules; supramolecular chemistry
资金
- 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
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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