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Related Experiment Video

Updated: Dec 16, 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

2D-Covalent Organic Frameworks with Interlayer Hydrogen Bonding Oriented through Designed Nonplanarity.

Sampath B Alahakoon, Kui Tan, Haardik Pandey¹

¹Department of Physics and Center for Functional Materials, Wake Forest University, 1834 Wake Forest Road, Winston-Salem, North Carolina 27109, United States.

Journal of the American Chemical Society

|July 7, 2020

Summary

This summary is machine-generated.

Researchers developed new 2D-covalent organic frameworks (COFs) called COFamides, stabilized by amide hydrogen bonds. These novel materials exhibit unique structural properties due to their design, offering insights into framework stabilization.

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Last Updated: Dec 16, 2025

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

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Area of Science:

Materials Science
Chemistry

Background:

Covalent organic frameworks (COFs) are crystalline porous polymers.
Stabilizing COF layers is crucial for material properties.

Purpose of the Study:

To synthesize and characterize a new class of 2D-COFs stabilized by amide hydrogen bonds.
To investigate the impact of hydrogen bonding on COF structure and properties.

Main Methods:

Monomer design with nonplanar structures to orient amide groups.
Synthesis of azine-linked (COFamide-1) and imine-linked (COFamide-2) COFs.
Characterization using surface area analysis, pore size determination, crystallinity assessment, variable temperature infrared spectroscopy, and van der Waals density functional calculations.

Main Results:

Successfully synthesized COFamides with amide hydrogen bonds between layers.
Hydrogen bonding significantly stabilized the COF structure compared to controls.
Observed lower surface area and crystallinity in hydrogen-bonded COFs, indicating structural reinforcement.

Conclusions:

Amide hydrogen bonds effectively stabilize 2D-covalent organic frameworks.
The designed monomers facilitate the formation of inter-layer hydrogen bonds, influencing material properties.
COFamides represent a new class of COFs with tunable structural stability.