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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...
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,...
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Published on: March 24, 2018

Polymer-supported ionic-liquid-like phases (SILLPs): transferring ionic liquid properties to polymeric matrices.

Victor Sans1, Naima Karbass, M Isabel Burguete

  • 1Dpto. Química Inorgánica y Orgánica Department, Universidad Jaume I, Avda. Sos Baynat s/n, 12071 Castellon, Spain.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 29, 2011
PubMed
Summary

Polymers with ionic-liquid-like surface groups (SILLPs) effectively mimic bulk ionic liquid properties. These tunable solid solvents show potential for applications in catalysis and microwave heating.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Published on: December 20, 2016

Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Physical Chemistry

Background:

  • Ionic liquids (ILs) offer unique properties but can be challenging to handle in bulk.
  • Surface-immobilized ionic liquid-like moieties (SILLPs) present an alternative approach to harness IL properties in a solid-state format.

Purpose of the Study:

  • To investigate the physico-chemical properties of SILLPs.
  • To compare SILLPs with their corresponding bulk ionic liquids.
  • To explore the influence of SILLPs on swelling, microwave heating, and immobilized catalysis.

Main Methods:

  • Thermal analysis
  • Spectroscopic techniques
  • Impedance measurements
  • Dielectric measurements

Main Results:

  • Demonstrated effective transfer of properties from bulk ILs to SILLPs.
  • Studied the impact of SILLP chemical nature on swelling and microwave heating.
  • Evaluated the stability and activity of catalytic moieties immobilized on SILLPs.
  • Correlated microwave heating effects with dielectric loss (tan δ) values.

Conclusions:

  • SILLPs effectively replicate the properties of bulk ionic liquids.
  • The tunable nature of SILLPs allows for optimization in applications like catalysis and microwave-assisted processes.
  • Dielectric properties, specifically tan δ, are key indicators for microwave heating behavior in SILLPs.