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Related Concept Videos

Anionic Chain-Growth Polymerization: Overview01:20

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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,...
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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...
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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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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
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Electrochemical post-functionalization of conducting polymers.

Shinsuke Inagi1, Toshio Fuchigami

  • 1Department of Electronic Chemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan.

Macromolecular Rapid Communications
|March 5, 2014
PubMed
Summary

Electrochemical methods enable post-functionalization of conjugated polymers. This allows precise control over polymer properties by tailoring functionalization through controlled electrical charge, optimizing optoelectronic performance.

Keywords:
conducting polymersconjugated polymerselectrochemistrypolymer reactions

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Area of Science:

  • Polymer Chemistry
  • Electrochemistry
  • Materials Science

Background:

  • Conjugated polymers possess tunable optoelectronic properties.
  • Post-functionalization offers a route to modify these properties.
  • Electrochemical methods provide precise control over chemical reactions.

Purpose of the Study:

  • To summarize recent advancements in electrochemical post-functionalization of conjugated polymers.
  • To highlight methods for tailoring polymer properties via electrochemical reactions.
  • To discuss the role of bipolar electrochemistry in polymer functionalization.

Main Methods:

  • Electrochemical doping of conjugated polymer films.
  • Subsequent chemical transformations (e.g., fluorination, halogenation, hydrogenation).
  • Control of functionalization degree via charge passed.
  • Utilizing wireless bipolar electrodes for gradient synthesis.

Main Results:

  • Quantitative oxidative fluorination of polyfluorenes demonstrated.
  • Oxidative halogenation of polythiophenes achieved.
  • Reductive hydrogenation of polyfluorenones successfully performed.
  • Tunable optoelectronic properties achieved by controlling functionalization degree.

Conclusions:

  • Electrochemical post-functionalization is a versatile technique for modifying conjugated polymers.
  • Precise control over functionalization enables tailored optoelectronic properties.
  • Bipolar electrochemistry facilitates gradient synthesis and multiple reaction sites.