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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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 basic...
Conversion of Alcohols to Alkyl Halides02:48

Conversion of Alcohols to Alkyl Halides

This lesson delves into the conversion of alcohols to corresponding alkyl halides and the mechanism of action for different reagents. Typically, the hydroxyl group is first protonated to convert it to a stable leaving group. Consequently, based on the starting alcohol, the mechanism undergoes either of the nucleophilic substitution routes, SN1 or SN2. Tertiary alkyl halides are made using the two-step SN1 mechanism that occurs via a carbocation intermediate, which is stabilized by...
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the generated carbocation,...
Solvating Effects02:12

Solvating Effects

An understanding of the solvating effect helps rationalize the relation between solvation and acidity of the compound. In addition, this also explains the relative stability of conjugate bases for compounds with different pKa values. This lesson details, in-depth, the principle of solvating effects. The strength of an acid and the stability of its corresponding conjugate base are determined using pKa values. This observed relationship is a consequence of solvation, which is the interaction...
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...

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Stabilizing Ion Channels via Nonpolar Cross-Linking in Ion-Conductive Polymers for Robust CO2-to-Alcohol Conversion.

Yingke Wen1,2,3, Xinhao Su1, Xinfang Zhou1

  • 1Department of Chemistry, Zhejiang University, Hangzhou, China.

Angewandte Chemie (International Ed. in English)
|June 26, 2026
PubMed
Summary

Researchers developed a novel polymer architecture for durable carbon dioxide (CO2) to alcohol electrosynthesis. This stable design prevents ion channel degradation in alcohol, enabling efficient and continuous ethanol production.

Keywords:
CO2 reductionalcohol resistanceion channelion‐conductive polymernonpolar scaffolding

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Area of Science:

  • Electrochemistry
  • Polymer Science
  • Materials Science
  • Catalysis

Background:

  • Efficient alcohol electrosynthesis from carbon dioxide (CO2) requires stable ion-conductive polymers for ion transport and product separation.
  • Existing ion-conductive polymers suffer from alcohol-induced instability, limiting the durability of CO2 electrolysis.
  • Instability manifests as compromised ion channels, leading to reduced efficiency and product crossover.

Purpose of the Study:

  • To develop a polymer architecture that enhances the stability of ion channels in alcohol-rich environments for CO2 electrosynthesis.
  • To enable robust and durable conversion of CO2 to alcohols.
  • To overcome the limitations of current ion-conductive polymers in electrochemical applications.

Main Methods:

  • Designed a nonpolar cross-linked polymer architecture by covalently integrating ion-conductive poly(arylene) piperidinium into a nonpolar poly(styrene) network.
  • Created a hydrophobic scaffold to confine and stabilize ion channels against alcohol-induced swelling.
  • Tested the mechanical integrity and performance of the new polymer structure under prolonged alcohol exposure and during CO2 electrolysis.

Main Results:

  • The novel polymer structure retained over 97% of its mechanical integrity after 1000 hours of alcohol exposure, significantly outperforming conventional poly(arylene) piperidinium (17% integrity after 1 hour).
  • The stabilized ion channels maintained efficient ion transport and minimized alcohol crossover during electrolysis.
  • Achieved continuous ethanol production with over 99% product retention and stable cell performance, unlike conventional polymers that failed rapidly.

Conclusions:

  • Nonpolar cross-linking is an effective strategy for creating stable ion channels within ion-conductive polymers.
  • This molecular design approach enables durable CO2-to-alcohol electrolysis.
  • The developed polymer architecture offers a promising solution for advanced electrochemical applications requiring high stability in alcohol-rich environments.