Rare-earth complex nano luminescent material

A technology of nano-luminescent materials and rare earth complexes, applied in the field of nano-materials and complex nano-luminescent materials, can solve the problems of weak ion fluorescence and low ion absorption, and achieve the effect of saving cost, reducing cost and maintaining luminescent performance.

Inactive Publication Date: 2012-12-19
CHINA JILIANG UNIV
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Problems solved by technology

However, the fluorescence of the ion itself is still relatively w

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  • Rare-earth complex nano luminescent material
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  • Rare-earth complex nano luminescent material

Examples

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Embodiment 1

[0028] Rare earth complex nanomaterials: Weigh 205mg of potassium hydrogen phthalate, 73mg of adipic acid and 82mg of sodium hydroxide dissolved in 10mL of water, then add 5mL of dissolved 1mmol of rare earth nitrate Ln(NO 3 ) 3 ·6H 2 The aqueous solution of O (Ln=Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb) completely clarified the solution after addition, continued to stir the reaction, the solution gradually became turbid, and filtered the turbid solution after 1 hour, water and ethanol After washing several times and drying in vacuum, a powdery product is obtained with a yield of 57-63%. X-ray powder diffraction characterization confirmed that the product is a pure phase powder of rare earth complexes, and the spectrum is shown in the attached figure 1 , due to the characteristics of material orientation growth, some diffraction peaks are enhanced and some diffraction peaks basically disappear. Scanning electron microscope observation found that the product is indeed an orientation-...

Embodiment 2

[0030] Eu complex nanomaterials doped with equal proportions of Yb: Weigh 205mg of potassium hydrogen phthalate, 73mg of adipic acid and 82mg of sodium hydroxide dissolved in 10mL of water, then add 5mL of dissolved Eu(NO 3 ) 3 ·6H 2 O and Yb(NO 3 ) 3 ·6H 2 O each 0.5mmol mixed rare earth nitrate aqueous solution, completely clarifies the added solution, continues to stir and react, the solution becomes turbid gradually, after 1 hour the turbid solution is filtered, water and ethanol are washed several times, vacuum-dried to obtain powdery product, Yield 59%. Due to the low content of Eu in this nanomaterial, it directly excites the rare earth ion Eu(λ ex =394nm) is much lower than that of pure Eu material, and its fluorescence emission spectrum is shown in the attached Image 6 .

Embodiment 3

[0032] Tb complex nanomaterials doped with equal proportions of Gd: Weigh 205mg of potassium hydrogen phthalate, 73mg of adipic acid and 82mg of sodium hydroxide dissolved in 10mL of water, then add 5mL of dissolved Tb(NO 3 ) 3 ·6H 2 O and Gd(NO 3 ) 3 ·6H 2 O each 0.5mmol mixed rare earth nitrate aqueous solution, completely clarifies the added solution, continues to stir and react, the solution becomes turbid gradually, after 1 hour the turbid solution is filtered, water and ethanol are washed several times, vacuum-dried to obtain powdery product, Yield 58%. Due to the low content of Tb in this nanomaterial, it directly excites the rare earth ion Tb(λ ex =369nm) is much lower than the pure Tb material, and its fluorescence emission spectrum is shown in the attached Figure 8 . And when the material is excited with 289nm light, due to the good energy transfer from ligand to rare earth and Gd to Tb ions inside the material (antenna effect and concentration effect), its f...

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Abstract

The invention discloses a rare-earth complex nano luminescent material. The rare-earth complex nano luminescent material is obtained by performing controlled coordination reaction on rare-earth nitrate aqueous solution and mixed aqueous solution of ligand; the formula structure of the rare-earth complex nano luminescent material is [Ln(ad)0.5(phth)(H2O)2], wherein in the formula, Ln is single rare-earth element Eu, Tb or double rare-earth element of combination of Eu and Yb, or combination of Tb and Gd; in the formula, ad and phth are respectively organic ligand adipic acid and phthalic acid; the nano luminescent material is in nano sheet appearance; and the nano sheets can be mutually gathered to form flower-shaped appearance. The single rare-earth material and the double rare-earth doping material are strong fluorescent material; particularly, when the Gd-Tb double rare-earth material contains only 10% of Tb, the luminescent strength is nearly same as that of the pure Tb material. Therefore, the luminescent material has the advantages of nano materials; and moreover, the cost can be reduced through doping, thus, the rare-earth complex nano luminescent material has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, to the fields of complex nanomaterials and nanoluminescent materials, in particular to the field of complex nanoluminescent materials. Background technique [0002] Materials are recognized as one of the three pillars of the development of modern society. As one of the important functional materials, luminescent materials are widely used in industry, agriculture, medicine, national defense and other fields. For example, they can be used as fluorescent whitening agents, fluorescent pigments, fluorescent dyes, fluorescent reagents, laser dyes, fluorescent powders for lamps, and the like. In particular, the demand for various information displays in today's society and the urgent need for energy-saving lighting under the background of the energy crisis have greatly promoted the rapid development of luminescent materials. [0003] Nanomaterials refer to materials that have at least one dimens...

Claims

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Application Information

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IPC IPC(8): C07F5/00C09K11/06
Inventor 柴文祥张小丽宋春磊夹国华史宏声秦来顺范美强舒康颖
Owner CHINA JILIANG UNIV
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