Journal
SCIENCE
Volume 351, Issue 6271, Pages 365-369Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aad4011
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Funding
- Spanish Ministry of Economy and Competitiveness through the Juan de la Cierva program
- JST Research Acceleration Program
- Vetenskapsradet, Japan
- JEOL Ltd, Japan
- EXSELENT, Sweden
- 3DEM-Natur, Sweden
- BK21Plus, Korea
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- National Science Foundation (NSF) [DMR-1344290]
- [25390023]
- Direct For Mathematical & Physical Scien [1344290] Funding Source: National Science Foundation
- Division Of Materials Research [1344290] Funding Source: National Science Foundation
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A three-dimensional covalent organic framework (COF-505) constructed from helical organic threads, designed to be mutually weaving at regular intervals, has been synthesized by imine condensation reactions of aldehyde functionalized copper(I)-bisphenanthroline tetrafluoroborate, Cu(PDB)(2)(BF4), and benzidine (BZ). The copper centers are topologically independent of the weaving within the COF structure and serve as templates for bringing the threads into a woven pattern rather than the more commonly observed parallel arrangement. The copper(I) ions can be reversibly removed and added without loss of the COF structure, for which a tenfold increase in elasticity accompanies its demetalation. The threads in COF-505 have many degrees of freedom for enormous deviations to take place between them, throughout the material, without undoing the weaving of the overall structure.
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