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Electrochromic polymeric compounds, preparing method and application thereof

An electrochromic and polymer technology, applied in the direction of electrolytic process, electrolytic components, electrolytic organic production, etc., can solve the problems of limited response time of electrochromic polymers, limited stability of electrochromic polymers, etc., and achieve response time Short and stable effect

Inactive Publication Date: 2008-10-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current problem is that many electrochromic polymers have limited stability in the oxidized or reduced state
And since counterions must diffuse into and out of the polymer layer to maintain charge balance, this process limits the response time of electrochromic polymers.

Method used

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  • Electrochromic polymeric compounds, preparing method and application thereof
  • Electrochromic polymeric compounds, preparing method and application thereof
  • Electrochromic polymeric compounds, preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Electrochemical synthesis of 3,8-bis(2,2'-thiophene)-o-phenanthroline polymer.

[0037] (1) Synthesis of 3,8-bis(2,2'-thiophene)-o-phenanthroline monomer

[0038] Magnesium powder (0.72 g, 30 mmol) and dry tetrahydrofuran (15 ml) were transferred to a round bottom flask under nitrogen. 2Bromo-thiophene (1.6 g, 10 mmol) was carefully added dropwise, and the mixture was allowed to react at room temperature for 2 hours under constant stirring. After filtration, the pre-prepared Grignard reagent was carefully added dropwise via cannula to the solution containing 3,8-dibromo-phenanthroline (1.34 g, 4 mmol), [NiCl 2 (dppp)] (0.070g, 0.127mmol) and dry tetrahydrofuran (15ml) in a three-neck round bottom flask and cooled to 0°C in ice water. The mixture was kept at room temperature for 2 hours and refluxed at 60°C for an additional 12 hours. with saturated NH 4 The reactant was quenched with aqueous Cl solution, extracted with chloroform, washed with sodium chloride solutio...

Embodiment 2

[0042] Electrochemical Synthesis of 3,8-Bis(2,2′-3-Methylthiophene)-Phenanthroline Polymer

[0043] (1) Synthesis of 3,8-bis(2,2'-3-methylthiophene)-o-phenanthroline monomer

[0044] Active magnesium (0.72 g, 30 mmol) and dry tetrahydrofuran (15 ml) were transferred to a round bottom flask under nitrogen. 3-Methyl-2-bromo-thiophene (1.99 g, 11.25 mmol) was carefully added dropwise, and the mixture was allowed to react at room temperature for 2 hours under constant stirring. After filtration, the pre-prepared Grignard reagent was carefully added dropwise via cannula to the solution containing 3,8-dibromo-o-phenanthroline (1.51 g, 4.5 mmol), [NiCl (dppp)] (0.070 g, 0.127 mmol) and dried tetrahydrofuran (15ml) in a three-necked round-bottomed flask and cooled to 0°C in ice water. The mixture was kept at room temperature for 2 hours and refluxed at 60°C for an additional 12 hours. with saturated NH 4 The reactant was quenched with aqueous Cl solution, extracted with chloroform...

Embodiment 3

[0048] Chemical Oxidative Synthesis of 3,8-Bis(2,2′-3-Methylthiophene)-Phenanthroline Polymer

[0049] (1) Synthesis of 3,8-bis(2,2'-3-methylthiophene)-o-phenanthroline monomer

[0050] Active magnesium (0.72 g, 30 mmol) and dry tetrahydrofuran (15 ml) were transferred to a round bottom flask under nitrogen. 3-Methyl-2-bromo-thiophene (1.99 g, 11.25 mmol) was carefully added dropwise, and the mixture was allowed to react at room temperature for 2 hours under constant stirring. After filtration, the pre-prepared Grignard reagent was carefully added dropwise via cannula to the solution containing 3,8-dibromo-o-phenanthroline (1.51 g, 4.5 mmol), [NiCl (dppp)] (0.070 g, 0.127 mmol) and dried tetrahydrofuran (15ml) in a three-necked round-bottomed flask and cooled to 0°C in ice water. The mixture was kept at room temperature for 2 hours and refluxed at 60°C for an additional 12 hours. with saturated NH 4 The reactant was quenched with aqueous Cl solution, extracted with chlorof...

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Abstract

The invention discloses an electrochromic polymer and a preparation method and an application thereof. The electrochromic polymer is a conjugated polymer containing phenanthroline groups in a main chain, showed in the general formula (I). In the formula (I), Ar is an electron-rich unit which is selected from units using thiophene, carbazole, diphenylamine, triphenylamine or fluorine as a main body; and n is a number from 3 to 20 and represents polymerization degree. The electrochromic polymer can be polymerized from the activated monomer in the structural formula (II) by an electrochemical oxidation method or a chemical oxidation method, and be applied to electrochromic devices. The electrochromic polymer can be reversibly oxidized or reduced to produce color change, and has the advantages of good stability and short response time. The film is directly and uniformly deposited and formed by the electrochemical method and the film thickness is adjusted by different deposition modes.

Description

(1) Technical field [0001] The invention relates to an electrochromic polymer, a preparation method and application thereof, and the electrochromic polymer can be used in an electrochromic device. (2) Background technology [0002] Electrochromic materials, that is, materials that change color by electro-oxidation or electro-reduction. The most important classes of compounds exhibiting electrochromic effects are: transition metal oxides, Prussian blue systems, viologen compounds, conducting polymers, coordination compounds of transition metals and lanthanides. Among them, polymer electrochromic material is a new type of electrochromic material. Due to its light weight, easy processing, adjustable resistance in a wide range, and good stability to the environment, it is used in electrochromic materials. Devices have broad application prospects, and have become a research hotspot in the past ten years, and many research results have been obtained. [0003] Electrochromic poly...

Claims

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Application Information

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IPC IPC(8): C08G73/06C25B3/02C25B3/23
Inventor 张诚徐意王纳川马淳安
Owner ZHEJIANG UNIV OF TECH
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