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Trimellitic acid-ltbh complex and its synthesis method

A technology of trimesic acid and trimesic acid sodium salt is applied in the field of trimesic acid-LTbH complex and its synthesis, which can solve the problems of affecting luminous intensity, fluorescence quenching, inability to meet requirements, etc., so as to improve luminescence performance effect

Inactive Publication Date: 2017-02-01
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Layered terbium hydroxide (LTbH), as a layered rare earth hydroxide, has the characteristics of long fluorescence lifetime, high thermal and chemical stability, but its laminated Tb 3+ with -OH, H 2 O coordination, resulting in fluorescence quenching, affects the luminous intensity, and cannot meet the requirements for luminescent materials in industrial applications.

Method used

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  • Trimellitic acid-ltbh complex and its synthesis method
  • Trimellitic acid-ltbh complex and its synthesis method
  • Trimellitic acid-ltbh complex and its synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1), using the uniform precipitation method to synthesize NO 3 -LTbH precursor

[0042] 0.453g (1mmol) Tb (NO 3 ) 3 ·6H 2 O, 1.10g (13mmol) NaNO 3 , 0.14g (1mmol) of hexamethylenetetramine (HMT) was dissolved in 80ml of degassed water to obtain an aqueous solution, and then hydrothermally reacted at 70°C for 16 hours. After the reaction, the obtained product was filtered by suction, washed with deionized water, and then filtered by suction, repeated 3 times, and dried in vacuum for 24 hours to obtain white powdery NO 3 - LTbH 0.251 g. to NO 3 Based on -LTbH, the yield was 96%.

[0043] (2), using ion exchange method to synthesize terephthalic acid-LTbH complex

[0044]0.166 g (1 mmol) of terephthalic acid and 0.060 g (1.5 mmol) of NaOH were added into 5 mL of deionized water to dissolve them completely to obtain a clear aqueous solution of sodium terephthalate salt.

[0045] 0.033g NO 3 -LTbH was dispersed in 75ml of deionized water, mixed with the above-prepa...

Embodiment 2

[0050] (1), using the uniform precipitation method to synthesize NO 3 -LTbH precursor

[0051] 0.453g (1mmol) Tb (NO 3 ) 3 ·6H 2 O, 1.650g (19.5mmol) NaNO 3 , 0.21g (1.5mmol) of hexamethylenetetramine was dissolved in 120ml of degassed water to obtain an aqueous solution, and then hydrothermally reacted at 90°C for 12 hours. After the reaction, the obtained product was filtered by suction, washed with deionized water and then filtered by suction, repeated 3 times, and then vacuum-dried for 24 hours to obtain white powdery NO 3 -LTbH 0.257g. to NO 3 Based on -LTbH, the yield was 98%.

[0052] (2), using ion exchange method to synthesize terephthalic acid-LTbH complex

[0053] 0.166 g (1 mmol) of terephthalic acid and 0.080 g (2 mmol) of NaOH were added into 5 mL of deionized water to dissolve them completely to obtain a clear aqueous solution of sodium terephthalate salt.

[0054] 0.087g NO 3 -LTbH was dispersed in 100 ml of deionized water, mixed with the aqueous sol...

Embodiment 3

[0059] (1), using the uniform precipitation method to synthesize NO 3 -LTbH precursor

[0060] 0.453g (1mmol) Tb (NO 3 ) 3 ·6H 2 O, 2.20g (26mmol) NaNO 3 , 0.28g (2mmol) of hexamethylenetetramine was dissolved in 160ml of degassed water to obtain an aqueous solution, which was hydrothermally reacted at 100°C for 18 hours. After the reaction, the obtained product was filtered by suction, washed with deionized water, and then filtered by suction, repeated 3 times, and dried in vacuum for 24 hours to obtain white powdery NO 3 - LTbH 0.258 g. to NO 3 Based on -LTbH, the yield was (98.8%).

[0061] (2), using ion exchange method to synthesize terephthalic acid-LTbH complex

[0062] 0.166 g (1 mmol) of terephthalic acid and 0.072 g (1.8 mmol) of NaOH were added into 5 mL of deionized water to dissolve them completely to obtain a clear aqueous solution of sodium terephthalate salt.

[0063] 0.118g NO 3 -LTbH was dispersed in 150 ml of deionized water, mixed with the aqueous...

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Abstract

The embodiment of the invention discloses a trimesic acid-LTbH complex and a synthesis method thereof. The chemical formula of the complex is Tb (OH) 2.3 (C9H3O6) 0.24.1.7H2O. A simple and easily-operated ion exchange method is adopted to insert higher-stability trimesic acid radical into an LTbH interlayer to form the trimesic acid-LTbH complex through synthesis, and the light-emitting performance of Tb3+ in the complex is improved unexpectedly. The trimesic acid-LTbH complex can serve as an efficient green light-emitting material.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to a trimesic acid-LTbH complex and a synthesis method thereof. Background technique [0002] Layered rare-earth hydroxide (LRH) is a new type of layered materials. Studies have shown that anions in layered rare earth hydroxides can be exchanged with anions of other compounds, and the 4f electrons of rare earth elements in some layered rare earth hydroxides can produce luminescence when excited. Therefore, layered rare earth hydroxides can be used as the basis for preparing luminescent materials, and rare earth hydroxides as luminescent materials have the advantages of narrow spectral lines, pure chromaticity, high luminous efficiency and long fluorescence lifetime. [0003] Layered terbium hydroxide (LTbH), as a layered rare earth hydroxide, has the characteristics of long fluorescence lifetime, high thermal and chemical stability, but its laminated Tb 3+ with -OH, H 2 O coordin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78C09K11/02C01F17/00
Inventor 马淑兰苏飞飞马辉李新新
Owner BEIJING NORMAL UNIVERSITY
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