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Related Concept Videos

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

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...
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

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...
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

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...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
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...
Pericyclic Reactions: Introduction01:17

Pericyclic Reactions: Introduction

Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic rearrangements are...

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Related Experiment Video

Updated: May 9, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
06:40

Synthesis of a Water-soluble Metal–Organic Complex Array

Published on: October 8, 2016

Metallo-supramolecular cyclic polymers.

Ke Zhang1, Yongping Zha, Bo Peng

  • 1Department of Polymer Science and Engineering, University of Massachusetts , Amherst, Massachusetts 01003, United States.

Journal of the American Chemical Society
|August 13, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created novel cyclic brush polymers using metallo-supramolecular interactions. This breakthrough allows direct visualization of these unique polymer structures, opening new avenues for advanced materials.

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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

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Last Updated: May 9, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
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Synthesis and Characterization of Self-Assembled Metal-Organic Framework Monolayers Using Polymer-Coated Particles
06:48

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Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level
06:55

Synthesis of Cyclic Polymers and Characterization of Their Diffusive Motion in the Melt State at the Single Molecule Level

Published on: September 26, 2016

Area of Science:

  • Macromolecular Chemistry
  • Supramolecular Chemistry
  • Polymer Science

Background:

  • Cyclic brush polymers are a novel macromolecular topology.
  • Combining cyclic brush polymers with metallo-supramolecular interactions presents new material possibilities.

Purpose of the Study:

  • To synthesize novel cyclic brush polymers by integrating metallo-supramolecular interactions.
  • To explore the potential of these new architectures for advanced material development.

Main Methods:

  • Synthesis of a universal cyclic template with a polynorbornene backbone via ring-expansion metathesis polymerization.
  • Modification of the template with terpyridine, a metal-chelating synthon.
  • Utilizing terpyridine side chains for the creation of cyclic polymer brushes and gels.

Main Results:

  • Successful construction of novel cyclic brush polymers through metallo-supramolecular assembly.
  • Metallo-supramolecular functionality enabled direct visualization of cyclic brush polymers using transmission electron microscopy.
  • Demonstrated the feasibility of creating cyclic polymer brushes and gels.

Conclusions:

  • This work pioneers the combination of cyclic brush polymer topology with metallo-supramolecular interactions.
  • The ability to visualize these structures opens new research directions.
  • This approach is expected to facilitate the creation of diverse cyclic-polymer-based architectures and novel materials.