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A kind of preparation method of blue light coumarin film with polyvinyl alcohol as matrix

A technology of polyvinyl alcohol and methyl coumarin, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor film-forming uniformity, influence of research results, changing luminescent wavelength, etc., and achieve good film-forming performance and preparation The method is simple and the effect of high transparency

Inactive Publication Date: 2017-11-21
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are related introductions on the preparation of thin films, the existing thin films generally suffer from poor uniformity of film formation, and the luminous wavelength will be changed to varying degrees after forming, so the research on luminous properties based on such thin films will have an impact on the research results

Method used

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  • A kind of preparation method of blue light coumarin film with polyvinyl alcohol as matrix
  • A kind of preparation method of blue light coumarin film with polyvinyl alcohol as matrix
  • A kind of preparation method of blue light coumarin film with polyvinyl alcohol as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Prepare 7-diethylamino-4-methylcoumarin in absolute ethanol solution

[0025] The specific preparation process is as follows: add 0.0235 g of 7-diethylamino-4-methylcoumarin to a clean and dry volumetric flask, and then add 100 ml of anhydrous ethanol solvent, and keep stirring until it is completely dissolved and a mole is obtained. The concentration is 1.0x10 -3 mol / L 7-diethylamino-4-methylcoumarin in absolute ethanol solution.

[0026] (2) Preparation of polyvinyl alcohol aqueous solution

[0027] The specific preparation process is: add 0.4991g of polyvinyl alcohol to a clean and dry test tube, then add 10 ml of deionized water, and continue to stir at 50 degrees Celsius until it is completely dissolved to obtain a polyvinyl alcohol with a mass concentration of 5% Aqueous solution.

[0028] (3) Prepare 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0029] The specific preparation process is as follows: use a micro-injector to measure 25 ul of the 7...

Embodiment 2

[0034] (1) Prepare 7-diethylamino-4-methylcoumarin in absolute ethanol solution

[0035] The specific preparation process is as follows: add 0.0581 g of 7-diethylamino-4-methylcoumarin to a clean and dry volumetric flask, then add 250 ml of anhydrous ethanol solvent, and keep stirring until it is completely dissolved to obtain a mole The concentration is 1.0x10 -3 mol / L 7-diethylamino-4-methylcoumarin in absolute ethanol solution.

[0036] (2) Preparation of polyvinyl alcohol aqueous solution

[0037] The specific preparation process is as follows: add 0.5002 g of polyvinyl alcohol to a clean and dry test tube, then add 10 ml of deionized water, and continue to stir at 80 degrees Celsius until it is completely dissolved to obtain a polyvinyl alcohol with a mass concentration of 5% Aqueous solution.

[0038] (3) Prepare 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0039] The specific preparation process is as follows: Use a micro-injector to measure 5 ul of the 7...

Embodiment 3

[0044] (1) Prepare 7-diethylamino-4-methylcoumarin tetrahydrofuran solution

[0045] The specific preparation process is as follows: add 0.0225 g of 7-diethylamino-4-methylcoumarin to a clean and dry beaker, then add 100 ml of tetrahydrofuran solvent, and keep stirring until it is completely dissolved and the molar concentration is 1.0 x10 -3 mol / L 7-diethylamino-4-methylcoumarin tetrahydrofuran solution.

[0046] (2) Preparation of polyvinyl alcohol aqueous solution

[0047] The specific preparation process is: add 1.003 g of polyvinyl alcohol to a clean and dry test tube, then add 20 ml of deionized water, and continue to stir at 60 degrees Celsius until it is completely dissolved to obtain a polyvinyl alcohol with a mass concentration of 5% Aqueous solution.

[0048] (3) Prepare 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0049] The specific preparation process is as follows: use a micro-injector to measure 50 ul of the 7-diethylamino-4-methylcoumarin tetrah...

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Abstract

The invention discloses a method for preparing a blue-light coumarin film with polyvinyl alcohol as a matrix. 1) preparing 7-diethylamino-4-methyl coumarin solution and polyvinyl alcohol solution respectively; 2) preparing 7 ‑Diethylamino‑4‑methylcoumarin / polyvinyl alcohol mixed solution; 3) Use a measuring tool to directly drop or spin coat the mixed solution obtained in step 2) on a clean and dry glass or quartz piece, and place it in the atmosphere Or dry at 25-80 degrees Celsius in a vacuum environment to obtain a 7-diethylamino-4-methylcoumarin / polyvinyl alcohol film with a concentration of 1.0x10-5 mol / g~1.0x10-4 mol / g. The preparation method forms a uniform film, has little change to the luminous wavelength, and is more conducive to the research on the luminous performance of the material. The preparation method is simple, the conditions are mild, easy to operate and control, and is suitable for actual production.

Description

Technical field [0001] The present invention relates to the study of coumarin luminescence technology, in particular to a preparation method of blue coumarin film with polyvinyl alcohol as a matrix, and belongs to the field of organic photoelectric technology. Background technique [0002] Organic light-emitting materials, due to their wide range of material sources, low prices, excellent photoelectric properties, flexibility and large-area preparation, have received continuous and focused attention and research in the fields of display and lighting. To achieve full-color display and white light illumination, blue light is essential. Compared with green light and red light materials, the research of blue light materials has been in a relatively backward state, which is currently one of the important factors restricting the commercial application of organic electroluminescence. [0003] Coumarin is a general term for compounds whose parent ring structure is benzo a-pyrone, and is e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L29/04C08K5/1545C09K11/06
Inventor 黄杰
Owner CHONGQING UNIV OF TECH
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