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Related Concept Videos

Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

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,...
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...

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Updated: May 24, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Redox-active cross-linkable poly(ionic liquid)s.

Xiaofeng Sui1, Mark A Hempenius, G Julius Vancso

  • 1Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands.

Journal of the American Chemical Society
|February 23, 2012
PubMed
Summary
This summary is machine-generated.

Researchers developed new cross-linkable redox-responsive polymers called poly(ferrocenylsilane)-based poly(ionic liquid)s (PFS-PILs). These polymers form nanogels or hydrogels and act as effective dispersants in polymerization processes.

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11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Development of stimuli-responsive polymers is crucial for advanced materials.
  • Poly(ferrocenylsilane)s offer unique redox and electrochemical properties.
  • Poly(ionic liquid)s provide tunable properties and potential for self-assembly.

Purpose of the Study:

  • To synthesize and characterize novel cross-linkable redox-responsive poly(ferrocenylsilane)-based poly(ionic liquid)s (PFS-PILs).
  • To investigate the self-assembly behavior of PFS-PILs into nanogels and hydrogels.
  • To evaluate the performance of PFS-PILs as dispersants in microemulsion polymerization.

Main Methods:

  • Synthesis of PFS-PILs via controlled polymerization techniques.
  • Characterization using spectroscopic and electrochemical methods.
  • Microemulsion polymerization of methyl methacrylate using PFS-PILs as dispersants.

Main Results:

  • Successful synthesis of a new class of cross-linkable, redox-responsive PFS-PILs.
  • PFS-PILs demonstrated concentration-dependent self-assembly into nanogels and hydrogels.
  • PFS-PILs effectively stabilized poly(methyl methacrylate) latex suspensions during microemulsion polymerization.

Conclusions:

  • The novel PFS-PILs exhibit tunable self-assembly and redox-responsive cross-linking capabilities.
  • These polymers show significant potential as efficient dispersants in emulsion polymerization for creating stable latexes.