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TiO2 nanoparticle-adsorbed perylene imide derivative film and application thereof as electrochromic material

A nano-particle and perylene imide technology, applied in the coating and other directions, can solve the problems of difficult film formation of perylene imide derivatives, easy to fall off, and limit the application of electrochromic materials, and achieve reversible color change and response time. Short, high-contrast effects

Active Publication Date: 2019-09-20
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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  • TiO2 nanoparticle-adsorbed perylene imide derivative film and application thereof as electrochromic material
  • TiO2 nanoparticle-adsorbed perylene imide derivative film and application thereof as electrochromic material
  • TiO2 nanoparticle-adsorbed perylene imide derivative film and application thereof as electrochromic material

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1: the synthesis of PPDI

[0045] (1) Synthesis of N,N'-bis(2-bisimidazolyl phosphate)-3,4,9,10-perylenetetracarboxylic acid diimide

[0046] 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.

[0047] (2) Synthesis of N,N'-bis(2-disodium eth...

Embodiment 2

[0053] Example 2: TiO 2 Preparation of Nanoparticle Adsorbed PPDI Film

[0054] Add TiO2 with a diameter of 20nm into the pre-dried 25mL beaker 2 Nanoparticles (1g), deionized water (10mL) and 0.1mol / L acetic acid (5mL), after fully mixed, put it into the reaction kettle, and keep it in the oven at 150°C for 12h, and then mix the treated Pour the solution into a pre-dried 25mL beaker, add 0.4g polyethylene glycol, and stir at room temperature for 8 hours. At this time, the solution produces a viscous paste. Rotate the viscous paste in the cleaned On the clean ITO, put the spin-coated ITO in an oven at 80°C for drying. After drying for 1 hour, put the ITO in a muffle furnace at 450°C for heat treatment. After 1 hour of treatment, a certain thickness of transparent TiO can be obtained. 2 Nanoparticle films. Treated TiO 2 The ITO of the nanoparticle film was put into 5mmol / L PPDI aqueous solution, and stood at room temperature for 36h. At this time, the TiO on the ITO 2 Nano...

Embodiment 3

[0056] Example 3: TiO 2 Electrochromic Properties of Nanoparticle Adsorbed PPDI Films

[0057] The TiO attached on the ITO glass prepared in embodiment 2 2 The nanoparticle adsorbed PPDI film was placed in a three-electrode electrolytic cell, and 0.2mol / L 1-butyl-3methyl-imidazole triflate / propylene carbonate solution was dissolved as the electrolytic solution, and the working electrode was attached There is TiO 2 ITO glass with nanoparticles adsorbing PPDI film, the counter electrode is a platinum wire, and the reference electrode is a 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. Record the relationship between the redox pea...

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Abstract

The invention discloses a TiO2 nanoparticle-adsorbed perylene imide derivative film and application thereof as an electrochromic material, and the TiO2 nanoparticle adsorption perylene imide derivative film is prepared from N,N-bis(2-ethylphosphate)-3,4,9,10-perylenetetracarboxylic acid diimide (PPDI) and TiO2 nanoparticles through chemical adsorption, wherein the structural formula of the TiO2 nanoparticle adsorption perylene bisimide derivative thin film is shown in the specification. Compared with other existing electrochromic materials, the prepared electrochromic material has the advantages of reversible color change, high color contrast, short response time and the like. The electrochromic material can display the color change from red to purple, the optical contrast can reach 30.05%, the coloring time is 1.62 s, and the electrochromic material is a potential electrochromic material.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of electrochromic materials, in particular to a TiO 2 Nanoparticle-adsorbed peryleneimide derivative films and their use as electrochromic materials that can be used in electrochromic devices. [0003] (2) Background technology [0004] Electrochromism refers to the phenomenon that the optical properties of electroactive materials, including the transmittance, reflectivity and color of the material, change reversibly under an applied electric field. The most intuitive change is the color change under different voltages, and more importantly, this color change is reversible. [0005] According to the different types of electrochromic materials, electrochromic materials can be divided into inorganic electrochromic materials and organic electrochromic materials. Inorganic electrochromic materials have higher cycle stability due to their stable molecular structure. ; while the molecular structure of ...

Claims

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Application Information

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IPC IPC(8): C03C17/42
CPCC03C17/42C03C2218/11C03C2218/111
Inventor 吕晓静查丽霞张诚钱亮徐欣佳毕茜
Owner ZHEJIANG UNIV OF TECH
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