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A kind of perylene imide derivative self-assembled thin film and its preparation method and application

A technology of peryleneimide and derivatives is applied in the field of self-assembled films of peryleneimide derivatives and their preparation, which can solve the problems of easy shedding, limited application of electrochromic materials, difficult film formation of peryleneimide derivatives, etc. question

Active Publication Date: 2021-06-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although their solubility has been improved, most peryleneimide derivatives are difficult to form films, or are easy to fall off after film formation, which limits their application as electrochromic materials.

Method used

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  • A kind of perylene imide derivative self-assembled thin film and its preparation method and application
  • A kind of perylene imide derivative self-assembled thin film and its preparation method and application
  • A kind of perylene imide derivative self-assembled thin film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: the synthesis of PPDI

[0044] (1) Synthesis of N,N'-bis(2-bisimidazolyl phosphate)-3,4,9,10-perylenetetracarboxylic acid diimide

[0045]Add perylene-3,4,9,10-tetraanhydride dianhydride (157mg, 0.40mmol), 2-aminoethylphosphonic acid ((100mg, 0.80mmol) and imidazole ( (0.5g, 7.35mmol). After it was mixed uniformly, the temperature was raised to 135°C. At this moment, imidazole melted into a liquid state, reacted for 15min, and reached the end of the reaction. Turn off the heating device, and wait for the reaction to be cooled to room temperature to obtain solid crude product. Crude product Wash and filter with (ethanol: 2mol / L HCl = 1:1), (ethanol: water = 1:1) and ethanol solution respectively, filter off the filtrate, and dry under vacuum to obtain N,N'-bis(2- 200mg of bisimidazolylethyl phosphate)-3,4,9,10-perylenetetracarboxylic acid diimide, the yield was 74.3%, and the product was a dark red solid.

[0046] (2) Synthesis of N,N'-bis(2-disodium ethy...

Embodiment 2

[0052] Embodiment 2: Preparation of PPDI self-assembled film

[0053] Add deionized water (200mL), hydrogen peroxide (40mL) and ammonia water (20mL) into a pre-dried 250mL beaker, then place the pre-cleaned ITO glass in the above solution, heat the solution to 60°C and keep it for 1h After the heating is completed, rinse with deionized water for 3 times and dry in an oven at 60°C for 1 hour. At this time, a layer of -OH will be adsorbed on the surface of ITO. Then put the processed ITO into ZrOCl 2 (5mmol / L) aqueous solution, at room temperature for 12h, at this time -OH on the ITO will react with ZrOCl 2 Zr in 4+ Form a chemical bond, thereby adsorbing a layer of Zr 4+ . Then put ITO into PPDI (1mmol / L) aqueous solution, and let it stand at room temperature for 12h. At this time the Zr on the ITO 4+ It will form a chemical bond with -OH in PPDI, thereby adsorbing a layer of PPDI. Repeat the above steps 8 times to obtain the perylene imide derivative self-assembled film...

Embodiment 3

[0055] Example 3: Electrochromic properties of PPDI self-assembled films

[0056] The PPDI self-assembled film attached to the ITO glass prepared in Example 2 is put into a three-electrode electrolytic cell to dissolve 0.2mol / L 1-butyl-3 methyl-imidazole trifluoromethanesulfonate / carbonic acid Propylene ester solution is used as electrolytic solution, wherein the working electrode is ITO glass with perylene imide derivative self-assembled film, the counter electrode is platinum wire, and the reference electrode is silver-silver chloride electrode. Cyclic voltammetry was used for scanning, the scanning voltage range was 0-1.3V, the scanning speed was 100mV / s, and the scanning was performed for 10 cycles. It can be observed with the naked eye that the color of the film changes from red to purple as the negative voltage decreases, and when the negative voltage increases, the color turns red again, and so on. The relationship between the redox peaks on the cyclic voltammetry curv...

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Abstract

The invention discloses a perylene imide derivative self-assembled thin film and its application in the preparation of electrochromic film devices. The structural formula of the peryleneimide derivative self-assembled film is shown in formula (I), wherein n in formula (I) represents the number of self-assembled layers, and n is 4-16. Compared with other existing electrochromic materials, the electrochromic material prepared by the invention has the advantages of reversible color change, high color contrast, faster response time and the like. It can display color changes from red to purple, the optical contrast can reach 61.1%, and the response time is 1.23s, which is a potential electrochromic material. In formula (I), n represents the number of self-assembled layers, and n is 4-16 layers.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of electrochromic materials, and in particular relates to a self-assembled thin film of perylene imide derivatives and a preparation method and application thereof. [0003] (2) Background technology [0004] Electrochromic materials refer to the changes in optical properties caused by the oxidation-reduction reaction of the material itself under the action of an external electric field, such as obvious changes in its absorptivity, transmittance, and reflectivity. Changes in color or light transmittance, and can be reversibly transformed with changes in the applied voltage. [0005] As a new type of functional material, electrochromic materials have broad application prospects due to their abundant sources, simple preparation process, and low energy consumption. Electrochromic materials can be divided into inorganic electrochromic materials and organic electrochromic materials: the early electroch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08L87/00
Inventor 张诚查丽霞吕晓静钱亮徐欣佳毕茜
Owner ZHEJIANG UNIV OF TECH
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