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Related Concept Videos

Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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 catalyst, high molecular...
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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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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

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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 of a...

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Coordination polymers containing rotaxane linkers.

V Nicholas Vukotic1, Stephen J Loeb

  • 1Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario, Canada N9B 3P4.

Chemical Society Reviews
|June 22, 2012
PubMed
Summary
This summary is machine-generated.

This review explores coordination polymers built with mechanically interlocked rotaxane molecules. These unique solid-state materials utilize four distinct axle-wheel templating motifs for their [2]pseudorotaxane linkers.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Coordination Chemistry

Background:

  • Coordination polymers are advanced materials with diverse applications.
  • Mechanically interlocked molecules (MIMs) offer unique structural and functional properties.
  • Rotaxanes, a type of MIM, can serve as sophisticated building blocks for novel materials.

Purpose of the Study:

  • To review coordination polymers constructed using mechanically interlocked rotaxane molecules as linking ligands.
  • To categorize and describe the different templating motifs employed in their synthesis.
  • To discuss future research directions and potential designs for next-generation materials.

Main Methods:

  • Review of existing literature on rotaxane-based coordination polymers.
  • Analysis of four distinct axle-wheel templating motifs for [2]pseudorotaxane linker synthesis.
  • Description of the synthesis and solid-state structures of reported coordination polymers.

Main Results:

  • Four templating motifs have been successfully used to create rotaxane-based coordination polymers.
  • These motifs involve specific axle and wheel components, including diaminoalkanes, bipyridinium, naphthalene dicarboxylate, and phenanthroline derivatives.
  • The synthesis and solid-state structures of these coordination polymers are detailed, showcasing their unique architectures.

Conclusions:

  • Coordination polymers incorporating mechanically interlocked rotaxane linkers represent a unique class of solid-state materials.
  • The described templating motifs provide a foundation for the rational design of such compounds.
  • Further research into these materials promises advancements in supramolecular materials design and applications.