Organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate and its preparation method and use

A technology of di-n-butylamine difluoro-chloroacetate and n-butylamine difluoro-chloroacetate, applied to organic molecule ferroelectric crystal di-n-butylamine difluoro-chloroacetate, the ferroelectric crystal In the field of material preparation, it can solve the problems of low spontaneous polarization, poor material stability, and practical application limitations, and achieve the effects of low cost, mild reaction conditions, and simple reaction

Active Publication Date: 2019-02-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few types of organic molecular ferroelectric crystal materials, the spontaneous polarization strength is relatively small, and the stability of the material is poor, which greatly limits its device preparation and practical application.

Method used

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  • Organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate and its preparation method and use
  • Organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate and its preparation method and use
  • Organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate and its preparation method and use

Examples

Experimental program
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Effect test

specific Embodiment approach

[0023] At room temperature, dissolve di-n-butylamine in deionized water, then add difluoro-chloroacetic acid, stir fully at 40-60°C (preferably 50°C) until it is completely dissolved, filter, and place the filtrate in a 35-45 °C (preferably 40 °C), slow crystallization in an oven to obtain the di-n-butylamine difluorochloroacetic acid salt, and the molar ratio of di-n-butylamine to difluorochloroacetic acid is 1:1. The molar ratio of di-n-butylamine to difluoro-chloroacetic acid can also be around 1:1.

(2) Specific examples

Embodiment 1

[0025] Preparation of organic molecular ferroelectric crystal material di-n-butylamine difluoromonochloroacetate

[0026] At room temperature, di-n-butylamine (5×10 -3 mol) and difluorochloroacetic acid (5×10 -3 mol) was dissolved in 50 mL of distilled water, heated to 50°C, and stirred for 20 min to fully react. After the solution is cooled and crystallized, filtered and dried, the di-n-butylamine difluoromonochloroacetate is obtained. Then the solid powder was redissolved in 50 mL of distilled water, recrystallized three times, and slowly volatilized to obtain the colorless and transparent strip-shaped target product, namely di-n-butylamine difluoro-chloroacetate compound, with a yield of 96.2%.

[0027] After testing, the chemical formula of the di-n-butylamine difluoromonochloroacetate is C 10 h 20 CIF 2 NO 2 , its structure is

[0028]

[0029] The di-n-butylamine difluoro-chloroacetate belongs to the orthorhombic crystal system at room temperature, and the spac...

Embodiment 2

[0032] Application of organic molecular ferroelectric crystal material di-n-butylamine difluoromonochloroacetate in the field of ferroelectric storage

[0033] The di-n-butylamine difluoro-chloroacetate obtained in embodiment 1 is carried out hysteresis loop test, such as figure 1 As shown, at 245K, the test frequency is 20Hz, and the polarization intensity of the material has a linear relationship with the electric field; during the cooling process, under the same test frequency, there is an obvious hysteresis loop characteristic between the polarization intensity and the electric field at 240K ;The temperature continues to decrease, the polarization intensity continues to increase, and the coercive field also increases continuously, and the saturation polarization intensity reaches the saturation value of 3.9μC / cm at 236K 2 , the coercive field is 12.4kV cm -1 . The large saturation polarization and moderate coercive field make this organic molecular ferroelectric crystal ...

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Abstract

The invention relates to an organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate, a preparation method therefor and use of the organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate. Proven by tests on electric hysteresis loop of the organic molecular ferroelectric crystal material, i.e., di-n-butylamine difluoromonochloroacetate through a Sawyer-Tower circuit, the material shows good ferroelectric properties in a ferroelectric phase and has relatively high saturation polarization strength reaching 3.9[mu]c / cm<2> and moderate coercive field about 12.4kV / cm. Proven by variable temperature nonlinear tests, the material does not have obvious second-order nonlinear frequency-doubled signals in a paraelectric phase, obvious second-order nonlinear frequency-doubled signals appear when the temperature is cooled to Curie temperature (243K), the strength value of the nonlinear signals is saturated along with decrease of temperature, excellent nonlinear on / off performance is shown in an entire test temperature range, the on / off ratio reaches 28, and the repeatability is relatively good. The reaction is simple, and the conditions are moderate.

Description

technical field [0001] The invention relates to an organic molecular ferroelectric crystal di-n-butylamine difluoromonochloroacetate and its preparation method and use, belonging to the field of functional materials, in particular to the preparation and application of the ferroelectric crystal material. Background technique [0002] Ferroelectric materials are a special class of polar materials, which have a spontaneous polarization effect inside, and the spontaneous polarization direction can be flipped or reoriented under the action of an external field (such as electric field, magnetic field, pressure, etc.), so that the polarization The intensity and the electric field show a hysteresis loop relationship. Based on this characteristic, ferroelectric materials exhibit some special optoelectronic functional properties, such as ferroelectric effect, nonlinear switching effect, pyroelectric effect, piezoelectric effect, electro-optic effect and photorefractive effect, etc. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B7/14C07C211/07C07C209/00C07C209/56C07C53/18C07C51/41C07C51/43
CPCC07C53/18C07C211/07C30B7/14C30B29/54
Inventor 罗军华姬成敏孙志华张书泉李丽娜
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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