Supramolecular Alternating Donor-Acceptor Assembly toward Intercalated Covalent Organic Frameworks.
Huiqing Li1, Pengpeng Shao2, Shuqi Chen1
1Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China.
Journal of the American Chemical Society
|February 11, 2020
Summary
Researchers developed a new intercalated covalent organic framework (Intercalated-COF) by combining supramolecular interactions and polymerization. This strategy allows for vertical (z-direction) control of 2D-COFs, enabling new applications.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Nanotechnology
Background:
- Two-dimensional covalent organic frameworks (2D-COFs) typically form 3D structures via π-π interactions, making vertical (z-direction) modulation challenging.
- Controlling the interlayer spacing and properties of 2D-COFs is crucial for advanced material design.
Purpose of the Study:
- To develop a facile method for constructing 2D-COFs with controlled z-direction structure.
- To introduce a supramolecular strategy for "intercalating" guest molecules within 2D-COF frameworks.
Main Methods:
- Synchronized supramolecular donor-acceptor (D-A) interactions in vertical directions using perylene diimide (PDI) as the acceptor unit and perylene as the donor/intercalator.
- Lateral polymerization reactions between PDI (1) and p-phenylenediamine (2) to form the 2D-COF layers.
Main Results:
- Successfully synthesized a novel Intercalated-COF with uniformly separated PDI-based 2D layers by perylene guest layers.
- Demonstrated a new approach to control the z-direction of 2D-COFs through intercalation of guest molecules.
- The resulting framework is porous and crystalline.
Conclusions:
- The developed supramolecular strategy provides a versatile route for z-direction modulation of 2D-COFs.
- This approach opens avenues for designing advanced porous crystalline materials with tailored interlayer structures.
- The Intercalated-COF holds potential for diverse applications requiring precise structural control.
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