Luminous rare earth metal complexes and adjustable luminous nano film prepared by the same

A technology of rare earth metals and complexes, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of luminous intensity, tunability, thermal stability defects, etc. Effect

Inactive Publication Date: 2008-09-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the characteristics of organic materials, there are certain defects in luminous intensity, adjustability, thermal stability, etc.

Method used

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  • Luminous rare earth metal complexes and adjustable luminous nano film prepared by the same
  • Luminous rare earth metal complexes and adjustable luminous nano film prepared by the same
  • Luminous rare earth metal complexes and adjustable luminous nano film prepared by the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of NTB ligand:

[0029] (1) Add 16.2g (0.15mol) o-phenylenediamine and 9.6g (0.05mol) amine triacetic acid in a 250ml round bottom flask, add 60ml ethylene glycol and stir well, and heat the oil bath to 150°C and reflux for 10 hours During the reaction, a water separator can be installed to lead the generated water out of the reaction system; after the reaction is completed, it is poured into 200ml of water while stirring, filtered, and recrystallized with ethanol (decolorized with activated carbon if necessary) to obtain the product NTB, with a yield of 85 %.

[0030] (2) In a 150ml three-necked flask, add 1.02g (0.0025mol) NTB and 50ml of tetrahydrofuran treated with sodium metal, and add 0.3g (0.0077mol) in batches under the protection of nitrogen flow. For the water that has been removed, a slight excess of potassium metal is required) Metal potassium, until no hydrogen is produced, and then reflux for 1-2 hours, the system becomes white and turbid; at this ...

Embodiment 2

[0032] Preparation of rare earth metal complexes

[0033] Dissolve 0.05mmol NTB ligand in 5ml ethanol, then slowly add 5ml 0.025mmol rare earth salt (Ln(ClO 4 ) 3 ) (Ln=Eu, Tb, Ce) ethanol solution, stand overnight to obtain a white powder solid, filtered, washed with ethanol and ether, and placed in a desiccator to obtain the product with a yield of 50%.

Embodiment 3

[0035] Preparation of precursor sol

[0036] (1) Weigh the NTB or substituted NTB complexes of Eu, Tb, Ce with a molar ratio of 1:1:1, and dissolve them in a mixed solution of acetonitrile:ethanol=1:1 (the total molar concentration of rare earth metals is 10 -3 mol / l), then add a certain amount of tetrabutyl titanate (total moles of rare earth metal: moles of tetrabutyl titanate = 1:6), stir evenly, so that the solvent volatilizes to the total molar concentration of rare earth ions approximately It is 0.125mol / l.

[0037] (2) Use a particle size ≤0.2μm syringe filter to filter out the fine insoluble particles in the solution to prevent it from polluting the membrane. The filtered solution was slowly stirred with a magnetic stirrer at room temperature for 24 hours to fully hydrolyze, and then sealed and aged for more than three days to obtain a transparent and uniform precursor sol suitable for homogenization.

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Abstract

The invention provides a luminescent rare-earth metal complex, and a preparation method and application thereof. The luminescent rare-earth metal complex is a supramolecular complex which irradiates bright red, green, or blue light and is formed through complexation of rare earth metal ions Eu<3+>, Tb<3+>, Ce<3+> with tripodal ligand respectively. The invention also discloses the preparation method for the rare-earth metal complex, wherein an NTB ligand is dissolved in ethanol, ethanol solution of the rare earth salt is slowly added, and the mixture is put still, filtered, rinsed, and dried to obtain the luminescent rare-earth metal complex. The invention also discloses the application of the rare-earth metal complex to the preparation method of adjustable luminescent nanometer film on the basis of red, green, and blue rare-earth metal complexes. The nanometer film produced with the method is characterized in high adjustability of luminescence, high brightness, high thermal stability and so on, and has wide application prospect.

Description

Technical field [0001] The invention relates to a luminescent rare earth metal complex and a tunable luminescent nano film prepared therefrom. Background technique [0002] Nano-sized supramolecular coordination polymers and their composite materials have the structural characteristics of nanomaterials and metal-organic coordination supramolecules, so in terms of properties and functions, they have compatibility that other materials do not have. Non-linear optics, electricity, magnetism, catalysis and adsorption, and biological activity have potential applications. Among them, the rare earth supramolecular complex not only has the unique optical properties of rare earth ions, but also can greatly enhance the luminous efficiency by means of the energy transfer after the organic ligand absorbs light energy, and can realize the controllability of the material luminescence band through the modification of the ligand. Sex, thus opening up a new world in the field of luminescent materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
Inventor 潘梅苏成勇郑祥礼刘煜李浩德
Owner SUN YAT SEN UNIV
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