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Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
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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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Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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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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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Step-Growth Polymerization: Overview01:03

Step-Growth Polymerization: Overview

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
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Metallosupramolecular polymers: current status and future prospects.

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Metallo-supramolecular polymers offer dynamic, stimuli-responsive soft materials for diverse applications. Future research focuses on precise control over their properties and morphology for advanced material design.

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Area of Science:

  • Soft Materials Science
  • Polymer Chemistry
  • Supramolecular Chemistry

Background:

  • Metallo-supramolecular polymers are gaining traction due to their tunable properties and dynamic interactions.
  • Their unique topologies and stimuli-responsiveness make them suitable for materials and biological applications.
  • These polymers exhibit intriguing redox, photonic, electronic, and magnetic properties, driving interest in optoelectronics.

Purpose of the Study:

  • To review recent advancements in stimuli-responsive metallo-supramolecular systems.
  • To highlight challenges and future directions in developing systems with practical applications.
  • To discuss methodologies for controlling mesoscale morphology and programmed synthesis.

Main Methods:

  • Discussion of synthetic methodologies for regulating mesoscale morphology, including coordination modulation and pseudomorphic replication.
  • Exploration of programmed synthesis techniques like living polymerization and chemical fuel-driven transient systems.
  • Review of existing literature on stimuli-responsive metallo-supramolecular polymers.

Main Results:

  • Metallo-supramolecular polymers show promise for optoelectronic devices but face challenges in achieving precise spatiotemporal control and morphology regulation.
  • Current thermo- and sono-responsive systems lack fine-tuned control.
  • Advanced synthetic strategies are emerging for better material design.

Conclusions:

  • Continued development of stimuli-responsive metallo-supramolecular polymers is crucial for advancing soft materials science.
  • Programmed synthesis and precise morphology control are key future research directions.
  • These materials hold significant potential for novel applications in various fields.