Directing Molecular Weaving of Covalent Organic Frameworks and Their Dimensionality by Angular Control
Xing Han1,2, S Ephraim Neumann1,2, Brent L Nannenga3,4
1Department of Chemistry and Kavli Energy Nanoscience Institute, University of California, Berkeley, California 94720, United States.
Journal of the American Chemical Society
|October 16, 2023
Summary
Researchers developed a novel 2D woven covalent organic framework (COF) using a chain-link fence pattern. This breakthrough in reticular chemistry expands molecular weaving possibilities for advanced material design.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Reticular Chemistry
Background:
- Reticular chemistry commonly uses tetrahedral metal complexes for 3D woven structures.
- Two-dimensional (2D) molecular weaving remains an underexplored area in reticular chemistry.
Purpose of the Study:
- To develop a new strategy for synthesizing 2D woven covalent organic frameworks (COFs).
- To explore the creation of a 2D woven structure with a chain-link fence pattern.
Main Methods:
- Controlled linker angles in reticular synthesis.
- Linking aldehyde-functionalized copper(I) bisphenanthroline complexes with 4,4'-oxydianiline.
- Characterization using spectroscopic techniques, electron diffraction, and X-ray diffraction.
Main Results:
- Successful synthesis of a 2D woven COF with a chain-link fence structure, termed COF-523-Cu.
- The structure was confirmed as a twofold-interpenetrated chain-link fence.
- Demonstrated a new strategy for 2D molecular weaving.
Conclusions:
- This work advances the concept and practice of molecular weaving.
- Paves the way for designing complex 2D chemical structures.
- Expands the scope of reticular chemistry beyond 3D frameworks.
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