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Preparation method of blue-ray coumarin film with polyvinyl alcohol as substrate

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

Inactive Publication Date: 2015-01-28
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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  • Preparation method of blue-ray coumarin film with polyvinyl alcohol as substrate
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  • Preparation method of blue-ray coumarin film with polyvinyl alcohol as substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of 7-diethylamino-4-methylcoumarin absolute ethanol solution

[0029] The specific process of preparation is: add 0.0235 g of 7-diethylamino-4-methylcoumarin into a clean and dry volumetric flask, then add 100 ml of absolute ethanol solvent, and keep stirring until it is completely dissolved to obtain mole Concentration is 1.0x10 -3 mol / L 7-diethylamino-4-methylcoumarin absolute ethanol solution.

[0030] (2) Preparation of polyvinyl alcohol aqueous solution

[0031] The specific process of preparation is: add 0.4991g polyvinyl alcohol into a clean and dry test tube, then add 10 ml deionized water, and keep stirring at 50 degrees Celsius until it is completely dissolved to obtain polyvinyl alcohol with a mass concentration of 5%. aqueous solution.

[0032] (3) Preparation of 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0033] The specific process of preparation is: use a micro-injector to measure 25 ul of 7-diethylamino-4-methy...

Embodiment 2

[0038] (1) Preparation of 7-diethylamino-4-methylcoumarin absolute ethanol solution

[0039] The specific process of preparation is: add 0.0581 g of 7-diethylamino-4-methylcoumarin into a clean and dry volumetric flask, then add 250 ml of absolute ethanol solvent, and keep stirring until it is completely dissolved to obtain mole Concentration is 1.0x10 -3 mol / L 7-diethylamino-4-methylcoumarin absolute ethanol solution.

[0040] (2) Preparation of polyvinyl alcohol aqueous solution

[0041] The specific process of preparation is: add 0.5002 g of polyvinyl alcohol into a clean and dry test tube, then add 10 ml of deionized water, and keep stirring at 80 degrees Celsius until it is completely dissolved to obtain polyvinyl alcohol with a mass concentration of 5%. aqueous solution.

[0042] (3) Preparation of 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0043] The specific process of preparation is: use a micro-injector to measure 5 ul of 7-diethylamino-4...

Embodiment 3

[0048] (1) Preparation of 7-diethylamino-4-methylcoumarin tetrahydrofuran solution

[0049] The specific process of preparation is: add 0.0225 g of 7-diethylamino-4-methylcoumarin into a clean and dry beaker, then add 100 ml of tetrahydrofuran solvent, and keep stirring until it is completely dissolved to obtain a molar concentration of 1.0 x10 -3 mol / L solution of 7-diethylamino-4-methylcoumarin in tetrahydrofuran.

[0050] (2) Preparation of polyvinyl alcohol aqueous solution

[0051] The specific process of preparation is: add 1.003 g polyvinyl alcohol into a clean and dry test tube, then add 20 ml deionized water, and keep stirring at 60 degrees Celsius until it is completely dissolved to obtain polyvinyl alcohol with a mass concentration of 5%. aqueous solution.

[0052] (3) Preparation of 7-diethylamino-4-methylcoumarin / polyvinyl alcohol mixed solution

[0053] The specific process of preparation is: use a micro-sampler to measure 50 ul of the 7-diethylamino-4-methy...

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Abstract

The invention discloses a preparation method of a blue-ray coumarin film with polyvinyl alcohol as a substrate. The preparation method comprises the following steps: 1) preparing a 7-diethylamino-4-methyl coumarin solution and a polyvinyl alcohol solution respectively; 2) preparing a mixed solution of 7-diethylamino-4-methyl coumarin / polyvinyl alcohol; 3) directly dripping or spinning the mixed solution obtained in step 2) on a clean and dry glass or quartz plate by using a measuring implement, and in an atmospheric or vacuum environment, drying at 25-80 DEG C to obtain a 7-diethylamino-4-methyl coumarin / polyvinyl alcohol film with the concentration of 1.0*10<-5>mol / g to 1.0*10<-4>mol / g. By the preparation method, the film is uniform, change in an emission wavelength is small and study on luminescent properties of materials can be easier; the preparation method is simple, mild in condition and easy to operate and control and is applicable to actual production.

Description

technical field [0001] The invention relates to the research on luminescence technology of coumarin, in particular to a method for preparing a blue-light coumarin film with polyvinyl alcohol as a matrix, and belongs to the field of organic photoelectric technology. [0002] Background technique [0003] Organic light-emitting materials have received continuous and focused attention and research in the fields of display and lighting due to their wide source of materials, low price, excellent optoelectronic properties, and outstanding characteristics such as flexibility and large-area preparation. To achieve full color display and white lighting, blue light is essential. Compared with green and red light materials, the research on blue light materials has been in a relatively backward state, which is one of the important factors restricting the commercial application of organic electroluminescence. [0004] Coumarin is a general term for compounds whose parent ring structure...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L29/04C08K5/1545C09K11/06
Inventor 黄杰
Owner CHONGQING UNIV OF TECH
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