Lucigen cation and brucite composite luminescence film and preparation method thereof

A technology of luminescent film and hydrotalcite, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of limiting the development of hydrotalcite layered materials, reduce fluorescence quenching, realize immobilization and thin film, and realize orientation The effect of alignment and even dispersion

Active Publication Date: 2012-10-31
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the positive charge of the hydrotalcite laminate itself, it can only be assembled with anions, and the assembly of hydrotalcite and cationic molecules has not been reported so far, which greatly limits the development of hydrotalcite layered materials.

Method used

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  • Lucigen cation and brucite composite luminescence film and preparation method thereof
  • Lucigen cation and brucite composite luminescence film and preparation method thereof
  • Lucigen cation and brucite composite luminescence film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Preparation of hydrotalcite precursor with nitrate between layers by ion exchange method:

[0029] a. Add 0.010mol of solid Mg(NO 3 ) 2 ·6H 2 O and 0.005 mol of solid Al(NO 3 ) 3 9H 2 O and 0.06mol urea were dissolved in 70mL of deionized water, and crystallized in a 90ml polytetrafluoroethylene pressure reaction vessel at 100°C for 24 hours, then centrifugally washed with deionized water until the pH was about 7,70 ℃ drying for 12 hours to obtain carbonate hydrotalcite;

[0030] b. Take 0.3g of the above-mentioned carbonate hydrotalcite and solid NaNO 3 63.75g dissolved in 300mL to remove CO 2 After uniformly dispersed in deionized water, add 0.07mL of concentrated nitric acid and stir at 25°C under a nitrogen atmosphere to carry out ion exchange reaction for 12 hours and then use 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 70°C for 18 hours to obtain a magnesium-aluminum nitrate-intercalated hydrotalcite composite m...

Embodiment 2

[0037] 1. Preparation of nitrate hydrotalcite precursor by co-precipitation method:

[0038] a. Add 0.03mol of solid Mg(NO 3 ) 2 ·6H 2 O and 0.01mol of solid Al(NO 3 ) 3 9H 2 O dissolved in 50mL to remove CO 2 of deionized water;

[0039] b. Dissolve 0.06mol NaOH in 50mL to remove CO 2 of deionized water;

[0040] c. the alkali solution prepared by step b is placed in a four-necked bottle, 2 Under the condition of air protection, while vigorously stirring, slowly drop the salt solution prepared in step a into the four-necked bottle, and the drop is completed in about 0.5h. After the drop is completed, use 5mol / L NaOH solution to adjust its pH value to 8. React in a water bath at 60°C for 24h, remove CO with 2 The deionized hot water was centrifuged and washed to a pH of about 7, and dried at 70°C for 24 hours to obtain a magnesium-aluminum nitrate-intercalated hydrotalcite composite material;

[0041] 2. Take 0.1 g of the above-mentioned nitrate intercalated hydrota...

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Abstract

The invention discloses a lucigen cation and brucite composite luminescence composite green-light luminescence material and a preparation method thereof, belonging to the field of inorganic and organic composite luminescence materials. The preparation method briefly comprises the following steps: preparing lucigen cation and polymer anion mixed solution according to certain proportions; preparingbrucite colloid solution stripped by formamide solvent; and using a substrate after hydrophilic treatment to carry out a plurality of alternating assemblies in two solutions to obtain the lucigen cation and brucite multilayer composite film. The invention breaks down the wrong region that brucite nanometer sheets can only be assembled or compounded with anions, realizes the sequential assembly ofcation functional molecules and the brucite nanometer sheets for the first time, and broadens the application field of brucite materials. The invention has the advantages that the preparation processes of the film are simple, the operability is strong, the film luminescence strength can be controlled by changing assembling times, and the thickness of the single-layer film is in nanometer magnitude order.

Description

technical field [0001] The invention belongs to the field of inorganic-organic composite light-emitting materials, and in particular provides a green light-emitting film material composed of lucigenin cations and hydrotalcite nanosheets and a preparation method thereof. Background technique [0002] Double metal composite hydroxide, also known as Layered Double Hydroxides (LDHs for short), is a multifunctional anionic layered material, which has many characteristics such as adjustable layer metal elements and interlayer ion exchange. Through rational design, researchers have used various methods to introduce hundreds of anions with functional properties into the interlayers of hydrotalcite, forming anion-type intercalation materials with different properties, which are useful in catalysis, drug storage and release, It has broad application prospects in various fields such as photoelectric conversion. However, due to the positive charge of the hydrotalcite laminate itself, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06
Inventor 陆军闫东鹏卫敏段雪
Owner BEIJING UNIV OF CHEM TECH
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