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Network Covalent Solids02:18

Network Covalent Solids

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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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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A highly soluble, crystalline covalent organic framework compatible with device implementation.

Lingling Wang1, Cheng Zeng1, Hong Xu2

  • 1State Key Laboratory of Luminescent Materials and Devices , Institute of Polymer Optoelectronic Materials and Devices , South China University of Technology , Guangzhou 510640 , P. R. China . Email: gucheng@scut.edu.cn ;

Chemical Science
|February 19, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a highly soluble covalent organic framework (COF) for advanced optoelectronics. This breakthrough enables the creation of high-quality COF thin films, overcoming previous processing limitations for next-generation electronic devices.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Covalent organic frameworks (COFs) are promising 2D materials but suffer from poor solubility and processability.
  • This insolubility limits their application in thin-film devices, particularly in optoelectronics.
  • Developing processable COFs is crucial for unlocking their full potential.

Purpose of the Study:

  • To design and synthesize a highly soluble yet crystalline COF material.
  • To enable the fabrication of high-quality COF thin films for optoelectronic applications.
  • To investigate the electrical properties of the solution-processable COF films.

Main Methods:

  • Designed synthesis of a novel COF by regulating inter-layer interactions.
  • Characterization of COF solubility and structural integrity in organic solvents.
  • Fabrication of large-area, controlled-thickness COF thin films on various substrates.
  • Electrical anisotropy measurements of the COF films.

Main Results:

  • Achieved a highly soluble and crystalline COF material that forms stable true solutions.
  • Demonstrated solution processability for high-throughput, efficient fabrication of COF films.
  • Films exhibit electrical anisotropy with inhibited intra-layer conduction and outstanding inter-layer carrier migration.
  • Attained the highest conductivity reported for COF materials.

Conclusions:

  • The developed soluble COF overcomes traditional processing barriers for 2D materials.
  • Solution-processable COF films are compatible with diverse device applications.
  • This work paves the way for high-performance COF-based optoelectronic devices with novel functionalities.