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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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Cationic Chain-Growth Polymerization: Mechanism00:57

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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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Antimicrobial Proteins01:23

Antimicrobial Proteins

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
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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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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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Bioinspired Cationic Antimicrobial Polymers.

Heliya Javadi1, Anne-Catherine Lehnen1,2, Matthias Hartlieb1,2

  • 1Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476, Potsdam, Germany.

Angewandte Chemie (International Ed. in English)
|April 16, 2025
PubMed
Summary
This summary is machine-generated.

Antimicrobial polymers offer a promising solution to combat antimicrobial resistance (AMR). These materials are unlikely to develop resistance, providing a vital new strategy against dangerous infections.

Keywords:
AntibacterialAntimicrobial polymersAntimicrobial resistanceCationic polymersMembrane interaction

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Infectious Diseases

Background:

  • Antimicrobial resistance (AMR) is a major global health threat, jeopardizing modern medical advancements.
  • Existing antibiotics are becoming less effective due to widespread resistance.
  • Novel therapeutic strategies are urgently needed to overcome AMR.

Purpose of the Study:

  • To review recent advances in antimicrobial polymers (APs) as a potential solution to AMR.
  • To highlight structure-property relationships and design strategies for APs.
  • To explore the potential of APs in clinical applications.

Main Methods:

  • Review of recent scientific literature on antimicrobial polymers.
  • Analysis of AP design, polymeric architecture, and stimuli-responsive properties.
  • Evaluation of synergistic effects and in vivo applications of APs.

Main Results:

  • Antimicrobial polymers (APs) exhibit non-specific modes of action, making them less susceptible to resistance development.
  • Polymeric architecture significantly influences AP bioactivity.
  • Stimuli-responsive APs show potential for enhanced selectivity.
  • Synergistic effects with traditional antibiotics and in vivo applications are promising.

Conclusions:

  • Antimicrobial polymers represent a promising class of materials to combat AMR.
  • Further research into AP design, stimuli-responsiveness, and in vivo efficacy can pave the way for clinical translation.
  • APs offer a sustainable alternative to conventional antibiotics in the face of rising resistance.