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Related Concept Videos

Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

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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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Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

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The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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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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Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

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Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
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Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Updated: Jan 17, 2026

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst
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Visible Light-induced Living Cationic Polymerization Using Boranil Complex as a Robust Photocatalyst.

Yun Liao1,2, Shuai Zhou2, Xue Yang2

  • 1State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, Fuzhou 350116, China.

ACS Macro Letters
|September 22, 2025
PubMed
Summary
This summary is machine-generated.

Novel boranil-based photocatalysts enable visible-light-mediated cationic polymerization of vinyl ethers. This method offers excellent control over polymer properties and demonstrates robustness against air and moisture.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Photocatalysis

Background:

  • Efficient photocatalysts are crucial for controlled photomediated cationic polymerization.
  • Existing methods often lack robustness or require complex conditions.

Purpose of the Study:

  • To develop novel photocatalysts for visible-light-mediated cationic polymerization.
  • To achieve controlled polymer synthesis with high efficiency and robustness.

Main Methods:

  • Synthesis of boranil-skeleton-based photocatalysts.
  • Visible-light-mediated cationic polymerization of vinyl ethers.
  • Mechanistic studies including computational analysis.
  • Demonstration in photocuring and photopatterning applications.

Main Results:

  • Successful visible-light-mediated cationic polymerization of vinyl ethers.
  • Polymers with well-controlled molecular weights and low dispersities were obtained.
  • The photocatalyst system demonstrated tolerance to air and moisture due to photoinduced Lewis acid site activation.
  • Effective application in photocuring and photopatterning.

Conclusions:

  • Boranil-based photocatalysts are effective for controlled visible-light-mediated cationic polymerization.
  • The system's robustness and operational simplicity offer advantages for polymer synthesis.
  • This photopolymerization technique shows promise for practical applications like photocuring and photopatterning.