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Crown Ethers02:36

Crown Ethers

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Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether...
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Crown Ether Host-Guest Molecular Ferroelectrics.

Yun-Fang Zhang1, Fang-Fang Di1, Peng-Fei Li1

  • 1Ordered Matter Science Research Center, Nanchang University, Nanchang, 330031, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|November 18, 2021
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Summary
This summary is machine-generated.

Crown-ether-based molecular ferroelectrics offer lightweight, flexible alternatives with unique host-guest structures. This review highlights their progress and suggests design strategies for enhanced ferroelectric performance.

Keywords:
crown etherscrystal structureferroelectricitymolecular ferroelectricsphase transitions

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Area of Science:

  • Materials Science
  • Solid-State Chemistry

Background:

  • Molecular ferroelectrics are gaining attention for their advantageous properties like flexibility and ease of preparation.
  • Crown-ether-based ferroelectrics, featuring a host-guest structure, are particularly interesting due to their potential for order-disorder transitions.

Purpose of the Study:

  • To review the research progress of crown ether host-guest molecular ferroelectrics.
  • To focus on crystal structure, phase transition, and ferroelectric properties.
  • To propose chemical design strategies for improving performance.

Main Methods:

  • Literature review and summary of existing research on crown ether host-guest molecular ferroelectrics.
  • Analysis of crystal structures and phase transition mechanisms.
  • Evaluation of ferroelectric properties and performance metrics.

Main Results:

  • Crown ether host-guest systems facilitate order-disorder transitions crucial for ferroelectricity.
  • Current materials exhibit promising ferroelectric properties but often have small spontaneous polarization and uniaxial characteristics.
  • Research has focused on understanding structure-property relationships.

Conclusions:

  • Crown ether host-guest molecular ferroelectrics represent a promising class of materials.
  • Further chemical design is needed to overcome limitations like small spontaneous polarization.
  • This review provides guidance for future development of high-performance materials in this field.