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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Charge-Assisted Ionic Hydrogen-Bonded Organic Frameworks: Designable and Stabilized Multifunctional Materials.

Xu-Yong Chen1, Li-Hui Cao1, Xiang-Tian Bai1

  • 1Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China.

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Charge-assisted ionic hydrogen-bonded organic frameworks (HOFs) enhance stability and functionality. This review covers their design, assembly, and applications in gas separation and biological uses.

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry

Background:

  • Hydrogen-bonded organic frameworks (HOFs) offer tunable structures but often lack stability.
  • Framework collapse after desolventisation limits HOF applications.

Purpose of the Study:

  • To review the development of charge-assisted ionic HOFs.
  • To explore design principles, assembly, and applications of these advanced HOFs.

Main Methods:

  • Review of existing literature on HOFs and charge-assisted ionic HOFs.
  • Analysis of building block construction modes.
  • Highlighting applications in gas adsorption, separation, proton conduction, and biological fields.

Main Results:

  • Charge-assisted ionic HOFs improve framework stability via electrostatic attraction.
  • These materials exhibit enhanced structural diversity and functionality.
  • Successful applications demonstrated in gas separation and biological contexts.

Conclusions:

  • Charge-assisted ionic HOFs represent a significant advancement in HOF stability and application scope.
  • Future prospects include diverse structural designs and multifunctional applications.