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Organic-inorganic hybrid molecular ferroelectric material and preparation and application thereof

A molecular ferroelectric and inorganic technology, applied in the direction of copper organic compounds, etc., to achieve the effect of simple preparation process, good repeatability and good application value

Pending Publication Date: 2022-04-12
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, although molecular ferroelectric materials have made great progress, how to design and optimize molecular ferroelectric materials with high Curie temperature is still a challenge, and it is urgent to develop new materials with excellent properties for further research and development. application

Method used

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  • Organic-inorganic hybrid molecular ferroelectric material and preparation and application thereof
  • Organic-inorganic hybrid molecular ferroelectric material and preparation and application thereof
  • Organic-inorganic hybrid molecular ferroelectric material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] At room temperature, add 4mmol cyclopentylamine and 3ml hydrobromic acid into ethanol for protonation, then add 2mmol copper bromide and stir until the solution is clear and evaporate slowly at room temperature, and dark purple flaky crystals are obtained after 6 days.

Embodiment 2

[0027] At room temperature, add 8 mmol of cyclopentylamine and 6 ml of hydrobromic acid into deionized water for protonation, then add 4 mmol of copper bromide and stir until the solution is clear and slowly evaporate at room temperature. After 10 days, deep purple flaky crystals are obtained.

Embodiment 3

[0029] At room temperature, add 3mmol cyclopentylamine and 1ml hydrobromic acid to ethanol for protonation, then add 1mmol copper bromide and stir until the solution is clear and evaporate slowly at room temperature, and dark purple flaky crystals are obtained after 3 days.

[0030] After comparison, we found that Example 1 had the best effect, the highest sample purity, and the best crystal quality.

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Abstract

The invention discloses an organic-inorganic hybrid molecular ferroelectric material which is of a crystal structure, the molecular general formula of the crystal is [CPA] 2CuBr4 (CPA = cyclopentylamine cation), an asymmetric unit is composed of two [CPA] < + > cations and a distorted [CuBr4] < 2-> anion, the crystal belongs to a monoclinic system Pna21 space group at the room temperature of 293 K, and is crystallized in a Pnma space group of an orthorhombic system at the room temperature of 395 K, the Curie temperature 393K exceeds that of most molecular ferroelectric, and the Curie temperature 393K can be comparable with that of a commercial ferroelectric BaTiO3 (393K); the crystal is prepared by adopting a solution volatilization method, the process is simple, the repeatability is high, and the crystal structure is stable. The molecular ferroelectric material shows excellent reversible dielectric properties and ferroelectricity, and can be applied to the fields of information storage, solar energy storage, sensors, variable capacitors, intelligent switches and the like.

Description

technical field [0001] The invention relates to a ferroelectric material and its preparation and application, in particular to an organic-inorganic hybrid molecular ferroelectric material and its preparation and application. Background technique [0002] Ferroelectric materials, whose spontaneous polarization can be switched by applying an electric field, make them attractive materials for information storage, optical sensors, capacitors, photovoltaics, and more. Since the discovery of the first ferroelectric Rochelle salt in 1920, a variety of inorganic ferroelectric ceramics have been put into use and are the heart and soul of the multi-billion dollar electronic ceramics industry. However, as people pay more and more attention to energy conservation and environmental protection, the complex process and high energy consumption have become the main obstacles restricting the application of inorganic ferroelectric materials. [0003] Molecular ferroelectric materials are cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/08
Inventor 叶丝雨李俊毅刘静苑佟亮陈立庄
Owner JIANGSU UNIV OF SCI & TECH
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