Star‐shaped Poly(2‐alkyl‐2‐oxazolines): Synthesis and Properties

Теньковцев, А. В.; Amirova, Alina; Филиппов, А. П.

doi:10.1002/9781119157830.ch3

Cited by 3 publications

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“…It is known that branched and star-shaped polymers are more effective complexing agents in comparison with linear polymers. These compounds can be used in designing delivery systems for hydrophobic drugs that are capable of selective content release under the action of temperature [12][13][14].As for the synthetic procedures for branched and star-shaped polymers, functionalized calix[n]arene macrocycles can be used as initiators of these reactions [14]. Calix[n]arenes have proven to be effective complexing agents for transition metal ions and low molecular weight organic compounds.…”

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Star-Shaped Poly(2-ethyl-2-oxazoline) and Poly(2-isopropyl-2-oxazoline) with Central Thiacalix[4]Arene Fragments: Reduction and Stabilization of Silver Nanoparticles

et al. 2019

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The interaction of silver nitrate with star-shaped poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) containing central thiacalix[4]arene cores, which proceeds under visible light in aqueous solutions at ambient temperature, was studied. It was found that this process led to the formation of stable colloidal solutions of silver nanoparticles. The kinetics of the formation of the nanoparticles was investigated by the observation of a time-dependent increase in the intensity of the plasmon resonance peak that is related to the nanoparticles and appears in the range of 400 to 700 nm. According to the data of electron and X-ray spectroscopy, scanning and transmission electron microscopy, X-ray diffraction analysis, and dynamic light scattering, the radius of the obtained silver nanoparticles is equal to 30 nm. In addition, the flow birefringence experiments showed that solutions of nanoparticles have high optical shear coefficients.

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Star-Shaped Poly(2-ethyl-2-oxazoline) and Poly(2-isopropyl-2-oxazoline) with Central Thiacalix[4]Arene Fragments: Reduction and Stabilization of Silver Nanoparticles

et al. 2019

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Poly(2‐Oxazoline)s

Guyse

Hoogenboom

2022

Macromolecular Engineering

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The design and synthesis of macromolecules, i.e. macromolecular engineering, employ specific synthetic tools for the control over the functionality, topology, and composition of a macromolecule. In terms of macromolecular engineering, 2‐oxazolines present an attractive monomer class for the design of a structurally diverse set of macromolecules, as a wide array of monomer structures can be prepared via established synthetic pathways and macromolecules have been prepared from this monomer by cationic ring‐opening, zwitterionic, anionic, and radical polymerization techniques. Most prominently applied, however, is the cationic ring‐opening polymerization, since it is compatible with a wide range of 2‐oxazoline monomers and the living polymerization mechanism allows excellent control over the macromolecular architecture throughout the different steps of the polymerization. Furthermore, the obtained poly(2‐alkyl/aryl‐2‐oxazoline)s (PAOx) display excellent physical and chemical stability, as well as an overall biocompatible nature. These factors combined have led to a recent rise in popularity of PAOx as a highly modular polymer platform in biomedicine, where cutting‐edge macromolecular engineering is applied to face current challenges in biomedicine. In this article, the current state and opportunities in the macromolecular engineering of PAOx are discussed in great detail, thereby providing an overview of the developed synthetic methodologies to control their functionality, topology, and composition.

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