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Visible light excited europium complex fluorescent film and preparation method therefor and application thereof

A europium complex and visible light technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor film-forming performance, low color purity, lack of flexibility, etc., and achieve the effect of increasing production and increasing emission intensity

Active Publication Date: 2015-12-09
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently commonly used substrate materials are not flexible enough to be made into curly films, and have low color purity, low luminous efficiency, and poor film-forming properties.

Method used

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  • Visible light excited europium complex fluorescent film and preparation method therefor and application thereof
  • Visible light excited europium complex fluorescent film and preparation method therefor and application thereof
  • Visible light excited europium complex fluorescent film and preparation method therefor and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The fluorescent film of europium complexes excited by visible light was prepared by the following method:

[0036]1) Dissolution of rare earth europium complex: accurately weigh 0.006g of europium complex Eu(TTA) 2 TPY-OCH 3 Add to a beaker, add 50ml THF (tetrahydrofuran) as a good solvent, stir at room temperature until Eu(TTA) 2 TPY-OCH 3 Completely dissolves to form Eu(TTA) 2 TPY-OCH 3 Concentration is the europium complex solution of 0.12g / L, standby;

[0037] 2) Dissolution of the blend matrix of PMMA / PVB (polymethyl methacrylate / polyvinyl butyral): Add a total of 0.194g of PMMA and PVB (the mass ratio of which is 2:3) into the beaker, and then add 50mlTHF is used as a good solvent, stirred at room temperature until completely dissolved to form a PMMA / PVB solution with a concentration of 3.88g / L, set aside;

[0038] 3) Miscibility: Mix the solutions prepared in step 1) and step 2), so that PMMA / PVB and Eu(TTA) in the mixed solution 2 TPY-OCH 3 The mass rati...

Embodiment 2

[0045] The fluorescent film of europium complexes excited by visible light was prepared by the following method:

[0046] 1) Dissolution of rare earth europium complex: accurately weigh 0.01g of europium complex Eu(TTA) 2 TPY-OCH 3 Add to the beaker, add 50ml chloroform good solvent, stir at room temperature until Eu(TTA) 2 TPY-OCH 3 Completely dissolves to form Eu(TTA) 2 TPY-OCH 3 Concentration is the europium complex solution of 0.2g / L, standby;

[0047] 2) Dissolution of the blend matrix of PMMA / PVB: Add a total of 0.19g of PMMA and PVB (mass ratio is 3:2) into a beaker, then add 50ml of THF good solvent, stir at room temperature until completely dissolved, and form a PMMA / PVB solution , its concentration is 3.8g / L, standby;

[0048] 3) Miscibility: Mix the solutions prepared in step 1) and step 2), so that PMMA / PVB and Eu(TTA) in the mixed solution 2 TPY-OCH 3 The mass ratio of the solution is 100:5, and stirred at room temperature to obtain a polymer solution that...

Embodiment 3

[0053] The fluorescent film of europium complexes excited by visible light was prepared by the following method:

[0054] 1) Dissolution of rare earth europium complex: accurately weigh 0.014g of europium complex Eu(TTA) 2 TPY-OCH 3 Add to the beaker, add 50ml chloroform good solvent, stir at room temperature until Eu(TTA) 2 TPY-OCH 3 Completely dissolves to form Eu(TTA) 2 TPY-OCH 3 Concentration is the europium complex solution of 0.28g / L, standby;

[0055] 2) Dissolution of PMMA / PVB blended matrix: Add a total of 0.186g of PMMA and PVB (mass ratio 1:3) into a beaker, then add 50ml of THF good solvent, stir at room temperature until completely dissolved, and form a PMMA / PVB solution , its concentration is 3.72g / L, standby;

[0056] 3) Miscibility: Mix the solutions prepared in step 1) and step 2), so that PMMA / PVB and Eu(TTA) in the mixed solution 2 TPY-OCH 3 The mass ratio of the solution is 100:7, and stirred at room temperature to obtain a polymer solution that can...

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Abstract

The invention provides a visible light excited europium complex fluorescent film and a preparation method therefor and application thereof. According to the fluorescent film provided by the invention, PMMA / PVB serves as a polymer matrix, wherein a europium complex Eu(TTA)2TPY-OCH3 is doped. The preparation method comprises the steps of selecting a PMMA / PVB polymer as a macromolecular matrix, dissolving and blending the rare-earth europium complex Eu(TTA)2TPY-OCH3 and the matrix according to a certain ratio by a doping method, and dropping the solution to form the film. The obtained film has the greatest characteristic that obvious red light is shown under visible light (410nm). Therefore, the fluorescent film prepared by the preparation method can be used for greatly increasing the light absorption utilization ratio of plants, effectively promoting the photosynthesis of the plants and greatly increasing the yield of the plants, has an important significance in agricultural production and can be extensively used as agricultural films.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials, and in particular relates to a fluorescent film of europium complexes excited by visible light, a preparation method and application thereof. Background technique [0002] Facing the current increasingly serious food shortage problem, increasing the yield of crops is one of the effective ways to solve this problem. The most difficult problem to be solved in increasing yield is how to improve the photosynthetic utilization rate of crops. At present, the agricultural films used are not obvious for improving the light utilization efficiency of crops, so it is very important to prepare an agricultural film that can promote photosynthesis of crops. [0003] my country is a big country with rare earth resources in the world, accounting for about 77% of the world's industrial reserves of rare earth resources. Since the 1970s, the incorporation of rare earth elements into lum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L29/14C08K5/00C08J5/18C09K11/06
Inventor 杨朝龙雷蕾何键王国霞高宝李上成俊霏
Owner CHONGQING UNIV OF TECH
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