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A visible light-excited europium complex fluorescent film, preparation method and application

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

Active Publication Date: 2017-12-29
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A visible light-excited europium complex fluorescent film, preparation method and application
  • A visible light-excited europium complex fluorescent film, preparation method and application
  • A visible light-excited europium complex fluorescent film, preparation method and application

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 3Add 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 its preparation method and application. The fluorescent film in the present invention uses PMMA / PVB as a polymer matrix and is doped with europium complex Eu(TTA)2TPY‑OCH3. The preparation method selects PMMA / PVB polymer as the polymer matrix, dissolves and blends the rare earth europium complex Eu(TTA)2TPY‑OCH3 with the matrix in a certain proportion by doping method, and forms a film by dripping. One of the most distinctive features of the obtained film is the obvious red light under visible light (410 nm). Therefore, the fluorescent film prepared by the present invention can greatly improve the utilization rate of light absorption by plants, effectively promote the photosynthesis of plants, greatly increase its yield, and is of great significance to agricultural production, and can be widely used as agricultural film .

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 lumin...

Claims

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Application Information

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Patent Type & Authority Patents(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