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Rare earth complex nanobelt and preparation method thereof

A technology of rare earth complexes and nanobelts, applied in the field of nanomaterials, can solve the problems that limit the development and application of rare earth complexes, and achieve the effects of strong rare earth ion characteristic luminescence, uniform shape and size, and good dispersion

Inactive Publication Date: 2012-08-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this method is limited to the research on the preparation method of single crystals of rare earth complexes, the development and application of nanoscale rare earth complexes are limited.

Method used

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  • Rare earth complex nanobelt and preparation method thereof
  • Rare earth complex nanobelt and preparation method thereof
  • Rare earth complex nanobelt and preparation method thereof

Examples

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preparation example Construction

[0032] The invention discloses a preparation method of a rare earth complex nanobelt, comprising the following steps: mixing RE nitrate and phthalic acid (1,2-BDC) in a polar solvent to obtain a mixed solution, RE being Gd or Y; add ammonia (NH 3 ·H 2 O), adjusting the pH value to 5.5-6.5, and reacting at 70-90° C. to obtain nanobelts of rare earth complexes.

[0033] In the above preparation process, the present invention reacts the rare earth nitrate with phthalic acid to deprotonate the carboxyl group of phthalic acid, realizes the coordination combination of rare earth ions and phthalic acid, and produces a large number of crystal nuclei. The crystal nucleus grows anisotropically in a polar solvent environment, and the chemical formula is RE 4 (1,2-BDC) 6 (H 2 O) 2 ·nH 2 O nanobelts of rare earth complexes.

[0034] Because rare earth elements have rich coordination modes and geometric configurations, they can produce rich topological structures, and their unique 4f...

Embodiment 1

[0053] Weigh phthalic acid (1,2-H 2 2.5 grams of BDC) was placed in a flask, 500 mL of deionized water was added, and 1 mol·L -1 Gd(NO 3 ) 3 solution 10mL, add NH dropwise 3 ·H 2 O adjusts the pH of the solution to 6, reacts for 1 hour, washes repeatedly with ethanol and deionized water, collects after centrifugation, and dries in the air to obtain the final product, that is, nanobelts of rare earth complexes, which are composed of Gd 4 (1,2-BDC) 6 (H 2 O) 2 4H 2 O.

[0054] The rare earth complex nanoribbons prepared in this example were subjected to XRD pattern analysis and scanning electron microscope analysis respectively, figure 1 The XRD pattern of the rare earth complex nanobelt prepared for the present embodiment, figure 2 SEM photos of the rare earth complex nanoribbons prepared for this example. It can be seen from the figure that the rare earth complex nanoribbon obtained in this example has a length of more than several hundred micrometers, uniform shap...

Embodiment 2

[0056] Weigh phthalic acid (1,2-H 2 2.5 grams of BDC) was placed in a flask, 500 mL of deionized water was added, and 1 mol·L -1 Gd(NO 3 ) 3 Solution 10mL and Eu(NO 3 ) 3 Solution 0.05mmoL, drop NH 3 ·H 2 O adjusts the pH of the solution to 6, reacts for 1 hour, washes repeatedly with ethanol and deionized water, collects after centrifugation, and dries in the air to obtain the final product, that is, nanobelts of rare earth complexes, which are composed of Gd 4 (1,2-BDC) 6 (H 2 O) 2 4H 2 O:0.5%Eu 3+ .

[0057] The rare earth complex nanoribbons prepared in this example were tested for photoluminescence performance, such as image 3 Shown is the photoluminescence emission spectrum of the rare earth complex nanobelt prepared in this example under the excitation condition of 280nm ultraviolet light. It can be seen from the figure that the rare earth complex nanoribbon prepared in the embodiment of the present invention shows strong characteristic luminescence of rar...

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Abstract

The invention discloses a rare earth complex nanobelt and a preparation method thereof. The method comprises enabling rare earth nitrate to react with phthalic acid, performing deprotonation of carboxyl of phthalic acid by adjusting the pH value of a solution, achieving coordinate bond between rare earth ions and phthalic acid, generating massive crystal nucleuses, enabling crystal nucleuses to achieve anisotropic growth in a polar solvent environment, and obtaining the rare earth complex nanobelt with the chemical formula to be RE4(1,2-BDC)6(H<2>O)2-nH<2>O or RE4(1,2-BDC)6(H<2>O)2-nH<2>O: xLn3+. Due to the fact that the pH value is 5.5-6.5, complete deprotonation of carboxyl of phthalic acid under the pH value is achieved, rare earth hydroxide is not formed, the solution is in a hypersaturated state, massive crystal nucleuses are generated rapidly, anisotropic growth is achieved so that a belt-shaped structure is formed, and block-shaped crystal caused by slow growth is avoided. Experimental results show that the width of the rare earth complex nanobelt is 100-150nm, the thickness of the rare earth complex nanobelt is 10-20nm, and the length of the rare earth complex nanobelt is over hundreds of microns.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, more specifically, to a rare earth complex nanobelt and a preparation method thereof. Background technique [0002] As a new type of organic-inorganic hybrid materials, metal-organic compounds rely on their unique tailorability, diverse topological structures, and applications in ion exchange, adsorption, molecular recognition, catalysis, optics, electricity, magnetism, chiral resolution, etc. The field has important application prospects and has received extensive attention. At the same time, with the continuous development of nanotechnology, the synthesis and physical and chemical properties of many nanoscale metal-organic materials have been further studied. application prospects. [0003] Rare earth elements have rich coordination modes and geometric configurations, can produce rich topological structures, and their unique 4f electronic structure endows rare earth elements with unique...

Claims

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Application Information

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IPC IPC(8): C07F5/00C30B7/14C30B29/54C30B29/62
Inventor 尤洪鹏乔卉
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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