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Updated: Aug 26, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

Soft 2D Covalent Organic Framework with Compacted Honeycomb Topology.

Chenglong Liu¹, Zhenzhu Wang¹, Lei Zhang¹

¹State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.

Journal of the American Chemical Society

|October 6, 2022

Summary

Researchers synthesized a novel soft 2D covalent organic framework (S-COF) with a unique compacted honeycomb structure. This breakthrough expands the possibilities for developing advanced S-COF materials.

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

Published on: February 10, 2023

Area of Science:

Materials Science
Organic Chemistry
Nanotechnology

Background:

Covalent Organic Frameworks (COFs) are crystalline porous polymers.
Existing COFs are typically rigid, limiting their structural diversity.
Soft COFs (S-COFs) offer potential for novel topological structures.

Purpose of the Study:

To synthesize a novel imine-based soft 2D covalent organic framework (S-COF).
To achieve a unique compacted honeycomb topology in an S-COF.
To explore the structural properties and formation mechanism of this new S-COF.

Main Methods:

Utilized a helically folded ditopic flexible linker and a trigonal building block for synthesis.
Characterized the S-COF structure using transmission electron microscopy (TEM), atomic force microscopy (AFM), and powder X-ray diffraction (PXRD).
Confirmed structural integrity and properties via thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FT-FTIR), and circular dichroism (CD) measurements.

Main Results:

Successfully synthesized a 2D S-COF with a previously unachieved compacted honeycomb topology.
The flexible skeleton enabled spontaneous formation of a nonporous, compacted structure via intramolecular π-stacking.
Demonstrated the unique topological structure through comprehensive material characterization.

Conclusions:

This study reports the first experimental realization of a compacted honeycomb topology in S-COFs.
The findings open new avenues for designing and synthesizing advanced S-COF materials.
Significantly expands the scope and potential applications of covalent organic frameworks.