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Electrochromic materials based on electroacid action and preparation of electrochromic devices

A technology of electrochromic materials and electrochromic devices, applied in the field of materials, can solve the problems of low efficiency and speed of electrochromic, color is not easy to fade, fading time, etc.

Active Publication Date: 2021-04-16
上海鼎弈材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an electrochromic material based on electroacid action and prepare an electrochromic device, which solves the problem of low efficiency and speed of proton transfer between electroacid molecules and acid-responsive molecules in the prior art and the problem of electrochromic The discolored color is not easy to fade or the problem of fading for a long time

Method used

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  • Electrochromic materials based on electroacid action and preparation of electrochromic devices
  • Electrochromic materials based on electroacid action and preparation of electrochromic devices
  • Electrochromic materials based on electroacid action and preparation of electrochromic devices

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Embodiment 1

[0039] In this embodiment, formula II-1 is used as the electrochromic molecule, 1-butyl-3-methylimidazolium hexafluorophosphate is used as the electrolyte, the two are mixed as the electrochromic material, acetonitrile is used as the solvent, and poly Methyl methacrylate was used as the solid medium. Wherein formula Ⅱ-1 is R in formula Ⅱ 1 , R 3 is N,N-diethyl, R 2 , R 4 , R 5 , R 6 is hydrogen, Y is oxygen, Ar is a benzene ring, Z 1 ,Z 2 It is methyl, and its structural formula is shown in formula II-1. Preparation of electrochromic medium solution: Weigh 1.7g polymethyl methacrylate, 0.1mL (0.5mmol / L) 1-butyl-3-methyl Imidazolium hexafluorophosphate as the electrolyte, 3g (5mmol / L) I-1, and dilute to 10mL with acetonitrile.

[0040]

[0041] Preparation of electrochromic devices: Spin-coat the above-mentioned electrochromic medium solution onto a clean ITO-1 electrode, and then assemble it into an electrochromic device. Under the condition of positive voltage +1.2...

Embodiment 2

[0043] In this embodiment, I-1 is used as the electrochromic molecule, tetrabutylammonium hexafluorophosphate is used as the electrolyte, the two are mixed as the electrochromic material, chloroform is used as the solvent, and polystyrene is used as the solid medium. Wherein formula I-1 is R in general formula I 1 is methyl, R 2 is aminophenyl, R 3 is N,N-diethyl, R 4 , R 5 , R 6 is hydrogen, X is amide, Y is oxygen, Ar is a benzene ring, Z 1 ,Z 2 It is a methyl group, and its structural formula is shown in formula I-1. Preparation of electrochromic medium solution: Weigh 1.7g polystyrene, 0.7g (1.8mmol / L) tetrabutyl ammonium hexafluorophosphate, 0.3g (0.4 mmol / L) I-1, dilute to 10 mL with chloroform.

[0044]

[0045] Preparation of electrochromic device: Spin-coat the above electrochromic medium solution onto a clean ITO-1 electrode, and then assemble it into an electrochromic device. The color becomes transparent to black; under the negative voltage of -1.0V, the...

Embodiment 3

[0047] In this embodiment, formula VI-1 is used as the electrochromic molecule, lithium perchlorate is used as the electrolyte, the two are mixed as the electrochromic material, acetone is used as the solvent, and polyethylene is used as the solid medium. Wherein formula Ⅵ-1 is R in formula Ⅵ 1 , R 3 is aminoethyl, R 2 , R 4 , R 5 , R 6 is hydrogen, Y is dimethyl silicon, Ar is a naphthalene ring, Z 1 It is methyl, and its structural formula is shown in formula VI-1. Electrochromic medium solution preparation: Weigh 1.7g polyethylene, 0.8g (7.5mmol / L) lithium perchlorate, 0.4g (0.6mmol / L) For Ⅵ-1 molecule, dilute to 10 mL with acetone.

[0048]

[0049] Preparation of electrochromic device: Spin-coat the above electrochromic medium solution onto a clean ITO-1 electrode, and then assemble it into an electrochromic device. The electrochromic device is under a positive voltage of +1.2V, and the device consists of Colorless and transparent to blue; under negative voltage...

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Abstract

The invention discloses an electrochromic material based on the action of electroacid and the preparation of an electrochromic device. The electrochromic material based on the action of electroacid is formed by mixing electrochromic molecules and electrolytes; The electrochromic material is used to prepare an electrochromic device, and the structure of the electrochromic device is a first electrode, an electrochromic medium, an ion exchange membrane, an auxiliary medium, and a second electrode. The invention can not only improve the coloring efficiency of the electrochromic device, but also accelerate the response speed of the electrochromic device by connecting the electroacid part and the acid response part in one molecule. After the proton transfer, the protonated acid-responsive part is covalently bonded to the electroacid proton donor part, so it will not diffuse away from each other, which can speed up the proton recovery speed, that is, speed up the fading speed of the electrochromic device.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to an electrochromic material based on intramolecular electroacid action and the preparation of an electrochromic device. Background technique [0002] Some organic molecules or groups are weakly acidic before oxidation, but the acidity increases significantly after oxidation. [0003] The combination of electroacid molecules and acid-responsive molecules can be used to prepare new types of electrochromic materials, using electricity to control the acidity of electroacid molecules, and different acids will stimulate acid-responsive molecules to produce color changes, resulting in electrochromic phenomena. However, the previously reported electroacid system is an intermolecular behavior. The electroacid molecule and the acid-responsive molecule are two different molecules. When the electroacid is oxidized, the proton transfer is from the electroacid molecule to the acid When the ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/00C09K9/02G02F1/1516
CPCC09K9/02C09K2211/1007C09K2211/1088C09K2211/1092C09K2211/1096G02F1/15Y02P20/54
Inventor 张宇模王晓君张晓安
Owner 上海鼎弈材料科技有限公司
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