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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: 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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Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.0K
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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Ion Exchange01:17

Ion Exchange

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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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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Crown Ethers02:36

Crown Ethers

5.2K
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether...
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Assembly and Characterization of Polyelectrolyte Complex Micelles
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Main-Chain Cationic Polyelectrolytes: Design, Synthesis, and Applications.

Amrita Hazra1, Suman Kalyan Samanta1

  • 1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.

Langmuir : the ACS Journal of Surfaces and Colloids
|January 22, 2024
PubMed
Summary

This review explores synthetic strategies for main-chain cationic polyelectrolytes. These polymers offer tunable properties and unique characteristics for diverse applications in sensing, optoelectronics, and energy.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Chemical Biology
  • Chemical Engineering
  • Device Physics

Background:

  • Polyelectrolytes are versatile materials with broad applications in sensing, biomedicine, energy, and more.
  • Main-chain cationic polyelectrolytes possess charged groups within their backbone, influencing their properties.
  • These polymers exhibit tunable solubility, photophysical characteristics, and unique functionalities.

Purpose of the Study:

  • To review crucial synthetic strategies for structurally diverse main-chain cationic polyelectrolytes.
  • To highlight the unique properties and potential applications of these advanced polymeric materials.

Main Methods:

  • Focus on synthetic methodologies for creating main-chain cationic polyelectrolytes.
  • Analysis of structure-property relationships in these polymers.

Main Results:

  • Main-chain cationic polyelectrolytes exhibit tunable solubility in various solvents.
  • They possess unique characteristics like ease of processing, film formation, and ionic interactions.
  • These polymers demonstrate main-chain-directed charge transport and high conductivity.

Conclusions:

  • Main-chain cationic polyelectrolytes are promising candidates for advanced applications.
  • Their tunable properties and unique characteristics support use in chemo- and biosensing, optoelectronics, and energy conversion devices.
  • Further research into synthetic strategies can unlock their full potential in areas like antibacterial activity and ion conduction.