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Method for preparing coumarin film taking polymethyl methacrylate as matrix

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

Inactive Publication Date: 2015-02-18
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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  • Method for preparing coumarin film taking polymethyl methacrylate as matrix
  • Method for preparing coumarin film taking polymethyl methacrylate as matrix
  • Method for preparing coumarin film taking polymethyl methacrylate as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolving 7-hydroxy-4-methylcoumarin

[0029] The specific process of dissolution is: add 0.0181 g of 7-hydroxy-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, and the molar concentration is 1.0x10 -3 mol / L 7-hydroxy-4-methylcoumarin absolute ethanol solution.

[0030] (2) Dissolving polymethyl methacrylate

[0031] The specific process of dissolution is: add 0.4987 g of polymethyl methacrylate into a clean and dry test tube, then add 10 ml of tetrahydrofuran, and keep stirring at 60 degrees Celsius until it is completely dissolved to obtain polymethyl methacrylate with a mass concentration of 5%. methyl acrylate tetrahydrofuran solution.

[0032] (3) Mix 7-hydroxy-4-methylcoumarin / polymethyl methacrylate solution

[0033] The specific process of mixing is: use a micro-sampler to measure 25 ul of the 7-hydroxy-4-methylcoumarin absolute ethanol solution obta...

Embodiment 2

[0039] (1) Dissolving 7-hydroxy-4-methylcoumarin

[0040] The specific process of dissolution is: add 0.0437 g 7-hydroxy-4-methylcoumarin into a clean and dry volumetric flask, then add 250 ml of dichloromethane solvent, and keep stirring until it is completely dissolved, and the molar concentration is 1.0x10 -3 mol / L solution of 7-hydroxy-4-methylcoumarin in dichloromethane.

[0041] (2) Dissolving polymethyl methacrylate

[0042] The specific process of dissolution is: add 1.0013 g of polymethyl methacrylate into a clean and dry test tube, then add 20 ml of tetrahydrofuran, and keep stirring at 50 degrees Celsius until it is completely dissolved to obtain polymethyl methacrylate with a mass concentration of 5%. methyl acrylate tetrahydrofuran solution.

[0043] (3) Mixing 7-hydroxy-4-methylcoumarin / polymethyl methacrylate solution

[0044]The specific process of mixing is: use a micro-sampler to measure 10 ul of the 7-hydroxy-4-methylcoumarin dichloromethane solution ob...

Embodiment 3

[0048] (1) Dissolving 7-hydroxy-4-methylcoumarin

[0049] The specific process of dissolution is: add 0.0171 g of 7-hydroxy-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 1.0×10 -3 mol / L solution of 7-hydroxy-4-methylcoumarin in tetrahydrofuran.

[0050] (2) Dissolving polymethyl methacrylate

[0051] The specific process of dissolution is: add 0.5002 g of polymethyl methacrylate into a clean and dry test tube, then add 10 ml of chloroform, and keep stirring at 60 degrees Celsius until it is completely dissolved to obtain polymethyl methacrylate with a mass concentration of 5%. chloroform methyl acrylate solution.

[0052] (3) Mix 7-hydroxy-4-methylcoumarin / polymethyl methacrylate solution

[0053] The specific process of mixing is: use a micro-injector to measure 50 ul of 7-hydroxy-4-methylcoumarin tetrahydrofuran solution obtained in step (1) a...

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Abstract

The invention discloses a method for preparing a coumarin film taking polymethyl methacrylate as a matrix. The method comprises the steps: (1) respectively preparing a 7-hydroxy-4-methylcoumarin solution and a polymethyl methacrylate solution; (2) preparing a 7-hydroxy-4-methylcoumarin / polymethyl methacrylate mixed solution; (3) directly dripping or spin-coating the mixed solution obtained in the step (2) on a clean and dry glass sheet or quartz sheet with a measuring tool, and drying at the temperature of 25-80 DEG C in an atmospheric or vacuum environment, so as to obtain a 7-hydroxy-4-methylcoumarin / polymethyl methacrylate film with the concentration of 1.0*10<-5>mol / g to 1.0*10<-4>mol / g. The method is uniform in film forming and little in change to luminescence wavelength and is more beneficial to the research on luminescent properties of materials; the method is simple, is mild in conditions and easy in operation and control, and is applicable to actual production.

Description

technical field [0001] The invention relates to the research on coumarin light-emitting technology, in particular to a method for preparing a coumarin film with polymethyl methacrylate 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 is be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L33/12C08K5/1545C09K11/06
Inventor 黄杰
Owner CHONGQING UNIV OF TECH
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