期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 135, 期 40, 页码 14952-14955出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja408243n
关键词
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资金
- NSF CAREER award [CHE-1056657]
- Cottrell Scholars Program of the Research Corporation for Science Advancement
- Camille Dreyfus Teacher-Scholar Award from Camille and Henry Dreyfus Foundation
- NSF [DMR-1120296]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1056657] Funding Source: National Science Foundation
Two-dimensional (2D) polymers assemble organic subunits into covalently linked, high-aspect-ratio networks with long-range order. Despite recent advances in 2D polymerization, scalable and general methods to access few- and single-layer materials are limited. Here we exfoliate a hydrazone-linked covalent organic framework (COF) to yield bulk quantities of few-layer two-dimensional (2D) polymers. Immersing the COF powder in several laboratory solvents exfoliates and disperses. thin COF-43 samples, which maintain their characteristic periodic hexagonal structure. This phenomenon was characterized using infrared spectroscopy, dynamic light scattering, atomic force microscopy, transmission electron microscopy, and selected area electron diffraction. 2D COFs with reduced interlayer interaction energies offer a new means to access high-aspect-ratio 2D polymers whose structure may be designed using established principles of COF synthesis.
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