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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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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...
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Anionic Chain-Growth Polymerization: Overview01:20

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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,...
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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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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.
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Bond Polarity
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In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Organic Mixed Ion-Electron Conductivity in Polymer Hybrid Systems.

Soumyajit Hazra1,2, Arindam Banerjee2, Arun K Nandi1

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Organic materials with mixed ion/electron conductivity (OMIEC) are revolutionizing devices. This review explores conjugated polymers and other systems, highlighting their properties and applications in energy and sensing.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electrochemistry

Background:

  • Organic materials with mixed ion/electron conductivity (OMIEC) are gaining research interest.
  • Their dual conductivity enables advanced electrochemical, biotechnological, and energy applications.
  • Semiconducting conjugated polymers are key OMIEC materials due to efficient bulk transport.

Purpose of the Study:

  • To review diverse OMIEC systems, including conjugated polymers and novel blends.
  • To discuss the conduction mechanisms, ion-electron coupling, and dimensionality of OMIEC materials.
  • To highlight the properties and applications of OMIEC materials and suggest future research directions.

Main Methods:

  • Literature review of OMIEC systems.
  • Analysis of conjugated polymers with ionic groups, block copolymers, polymer electrolytes, and various blends.
  • Examination of current-voltage (I-V) plots for predicting OMIEC properties.

Main Results:

  • Exploration of various OMIEC systems: conjugated polymers, block copolymers, polymer electrolytes, and blends.
  • Discussion of conduction mechanisms, ion-electron coupling, and material dimensionality.
  • Identification of OMIEC applications in energy storage, electrochromics, sensors, and biotechnology.

Conclusions:

  • OMIEC materials, particularly conjugated polymers, offer significant potential for next-generation devices.
  • Understanding conduction mechanisms is crucial for optimizing material performance.
  • Further research is needed to enhance OMIEC properties and expand their applications.