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Related Concept Videos

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...
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...
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Characteristics and Nomenclature of Homopolymers01:00

Characteristics and Nomenclature of Homopolymers

Polymers that are made up of identical monomer units are called homopolymers. Only one repeating unit is involved in the construction of the homopolymer structure. For example, as depicted in Figure 1, polypropylene is a homopolymer constituted of propylene monomers. Here, the only repeating unit in the polymer chain is propylene.
Preparation of Diols and Pinacol Rearrangement01:57

Preparation of Diols and Pinacol Rearrangement

Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.

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Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
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A metathesis route for BODIPY labeled polyolefins.

Filippo Marsico1, Andrey Turshatov, Katja Weber

  • 1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.

Organic Letters
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Acyclic diene metathesis polymerization (ADMET) efficiently labels polyolefins. Phosphorus chemistry enables precise labeling of degradable polyphosphoesters using BODIPY monomers or chain stoppers.

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Area of Science:

  • Polymer Chemistry
  • Organic Synthesis
  • Materials Science

Background:

  • Polyolefins are widely used polymers, but their functionalization for specific applications remains challenging.
  • Labeling polymers with specific functional groups is crucial for advanced material properties and applications.
  • Acyclic diene metathesis polymerization (ADMET) offers a controlled method for polymer synthesis.

Purpose of the Study:

  • To demonstrate ADMET as an efficient strategy for labeling polyolefins.
  • To explore the use of phosphorus chemistry in designing labeled polymer monomers and chain stoppers.
  • To synthesize precisely labeled, degradable polyphosphoesters.

Main Methods:

  • Utilizing acyclic diene metathesis polymerization (ADMET) for polyolefin synthesis.
  • Employing versatile phosphorus chemistry to design functionalized monomers and chain stoppers.
  • Incorporating BODIPY units for polymer labeling.

Main Results:

  • ADMET was confirmed as an effective method for polyolefin labeling.
  • Phosphorus chemistry facilitated the design of specific BODIPY-containing monomers and chain stoppers.
  • Precisely labeled, degradable polyphosphoesters were successfully synthesized.

Conclusions:

  • ADMET is a powerful tool for the precise labeling of polyolefins.
  • The integration of phosphorus chemistry and BODIPY units offers a versatile route to functionalized polymers.
  • This approach enables the development of advanced degradable polyphosphoesters with tailored properties.