Surface carboxylic acid functionalized water-soluble rare earth doped barium fluoride chloride nano-luminescent material and preparation method thereof

A nano-luminescent material and rare earth doping technology, which is applied in the direction of luminescent materials, chemical instruments and methods, can solve the problems of complex operation process, particle agglomeration, harsh experimental conditions, etc., and achieve simple preparation process, good water solubility and uniform particle size Effect

Inactive Publication Date: 2011-11-30
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

However, since the vast majority of nanoluminescent materials are synthesized under organic solvent conditions, they are neither water-soluble nor have functionalized surfaces for binding to biomolecules.
Although silica coating, layer by layer, and ligand exchange methods can modify the surface of nanomaterials so that they can be dissolved in water or connect biomolecules, there are many limitations in these methods. The problem
Although the method of silica coating is widely used, the operation

Method used

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  • Surface carboxylic acid functionalized water-soluble rare earth doped barium fluoride chloride nano-luminescent material and preparation method thereof
  • Surface carboxylic acid functionalized water-soluble rare earth doped barium fluoride chloride nano-luminescent material and preparation method thereof
  • Surface carboxylic acid functionalized water-soluble rare earth doped barium fluoride chloride nano-luminescent material and preparation method thereof

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example 1

[0018] Example 1: (1) Weigh 1g PAA, 0.22g barium chloride (BaCl 2 ·2H 2 O) and 0.37g europium chloride (EuCl 3 ·6H 2 O) completely dissolved in 30 ml of ethylene glycol, and stirred to obtain a transparent solution A; in another beaker, an appropriate amount of ammonium fluoride was dissolved in 15 ml of ethylene glycol, and stirred to obtain a transparent solution B; under stirring, to the solution A was added dropwise to solution B, stirring was continued for ten minutes, and the resulting cloudy solution was transferred into an autoclave, and hydrothermally treated at 200 ° C for 2 hours. After cooling, the solution was acidified and centrifuged with dilute hydrochloric acid (PH=1), and the obtained precipitate was washed three times in turn with water and ethanol, and then dried under vacuum at 60 °C to obtain BaFCl:Eu 3+ Nanocrystalline powder. Dissolving the obtained powder in water can obtain a colorless and transparent aqueous solution of the surface carboxylic aci...

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Abstract

The invention provides a surface carboxylic acid functionalized water-soluble rare earth doped barium fluoride chloride nano-luminescent material and a preparation method thereof, and relates to the preparation of a surface-functionalized water-soluble nano-luminescent material. The composition of the barium fluoride chloride nano-luminescent material prepared by the present invention is: XLn3+-(1-x)BaFCl (Ln=Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb ; x=0-60mol%). Using PAA as a surfactant, a water-soluble rare earth-doped barium fluoride chloride nanoluminescent material with surface carboxylic acid functionalization was prepared by one-step reaction. Through transmission electron microscope, infrared absorption spectrum, thermogravimetric curve and other test methods, it is proved that PAA is effectively coated on the surface of nanoparticles. The obtained nanopowder has good water solubility, and the carboxylic acid groups on its surface lay the foundation for the next step of binding biomolecules. By doping with different rare earth ions, the material can realize strong fluorescence emission of rare earth ions from the visible to the infrared range.

Description

[0001] technical field [0002] The invention relates to a water-soluble nano-luminescent material with surface functionalization and a preparation method thereof, in particular to a water-soluble rare-earth-doped barium fluoride chloride (BaFCl) nano-luminescence material with surface carboxylic acid functionalization and a preparation method thereof. Background technique [0003] Rare earth-doped nanoparticles are widely used in the fields of biological imaging and fluorescent immunoassay due to their stable luminescent properties, large Stokes shift, low toxicity, and multicolor luminescence. As a bioluminescent labeling material, nanoparticles need to have good water solubility and have functional groups on the surface that can bind biomolecules, such as carboxyl and amino groups. However, since the vast majority of nanoluminescent materials are synthesized under organic solvent conditions, they are neither water-soluble nor have functionalized surfaces for binding to bi...

Claims

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Application Information

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IPC IPC(8): C09K11/61
Inventor 陈学元鞠强李仁富朱浩淼
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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