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Terbium complex green fluorescent material and preparation method thereof

A technology of green fluorescence and terbium complexes, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve problems such as poor coordination ability and poor stability

Active Publication Date: 2018-05-08
XUCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coordination ability of such ligands and rare earth ions is relatively poor compared with carboxylic acids, so the stability of the complexes is relatively poor

Method used

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  • Terbium complex green fluorescent material and preparation method thereof
  • Terbium complex green fluorescent material and preparation method thereof
  • Terbium complex green fluorescent material and preparation method thereof

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preparation example Construction

[0023] A method for preparing a terbium complex green fluorescent luminescent material. Terephthalic acid and phthalic acid are weighed, and an aqueous solution of terbium perchlorate is added for reaction, wherein terbium perchlorate: terephthalic acid: phthalic acid The ratio of the amount of the substance is 1:0.4~0.6:0.8~1.2, adjust the pH value to 4.5~6.5, heat to 150°C~210°C, react for 24~96 hours, and then cool down at 1~5°C per hour, The colorless crystals of the complex were obtained, which were washed with ethanol and then dried to obtain a green fluorescent luminescent material of the terbium complex.

[0024] In the present invention, the preferred solution is: terbium perchlorate: terephthalic acid: the ratio of the amount of phthalic acid is 1:0.5:1; the pH value is 5.5, heated to 180 ° C, reacted for 72 hours, and then Cool down at 2°C per hour.

[0025] In the present invention, the reaction is carried out in a reactor, and the solvent for adjusting the pH val...

Embodiment 1

[0027] In the reaction kettle, 0.0166 g of terephthalic acid and 0.0332 g of phthalic acid were accurately weighed with an analytical balance, and 5.00 mL of terbium (Tb) perchlorate (0.04 mol L -1 ) in the reactor. Add 5 mL of deionized water to the reaction kettle, and use 1 mol·L -1 Sodium hydroxide was used to adjust the pH to 6. Then, put it into an oven with the temperature set at 180°C, react in the oven for 72 hours, and then lower the temperature at 2°C per hour to obtain colorless crystals with complexes, which are washed with absolute ethanol, dried in the air, and collected.

Embodiment 2

[0029] 0.0133g of terephthalic acid and 0.0299g of phthalic acid were accurately weighed with an analytical balance in the reaction kettle, and 4.00 mL of terbium (Tb) perchlorate (0.05 mol L -1 ) in the reactor. Add 5mL deionized water to the reaction kettle, and use 1mol·L -1 Potassium hydroxide adjusted the pH to 4.5. Then, put it into an oven, set the temperature at 160°C, react in the oven for 25 hours, and then lower the temperature at 1°C per hour to obtain colorless crystals with complexes, wash with absolute ethanol, dry in the air, and collect.

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PUM

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Abstract

The invention discloses a terbium complex green fluorescent luminous material. The complex luminous material is a three-dimensional coordination polymer containing two kinds of organic polycarboxylicacid anion ligands, and the general formula of the material is [Tb(1,4-bdc)0.5(1,2-bdc)(H2O)2]n, wherein 1,4-bdc represents terephthalic acid radical divalent anions, 1,2-bdc represents phthalic acidradical divalent anions, and n is a natural number greater than 100. According to the terbium complex green fluorescent luminous material, two kinds of benzene-ring containing organic dicarboxylic acid including terephthalic acid and phthalic acid are adopted as the ligands and react with terbium perchlorate under hydrothermal conditions, a terbium complex containing the two kinds of ligands is prepared and emits green fluorescence under the excitation of 250-350nm ultraviolet light, the luminescence belongs to the characteristic fluorescence of trivalent terbium ions, and under the excitation of 300nm ultraviolet light, the luminescence quantum efficiency reaches 56%, which indicates that the complex has good photoluminescence properties. Meanwhile, the complex does not decompose at thetemperature of 300 DEG C or below, which indicates that the complex has good thermal stability.

Description

technical field [0001] The invention relates to a preparation method for synthesizing a three-dimensional coordination polymer by reacting terbium perchlorate with terephthalic acid and phthalic acid under hydrothermal conditions. Background technique [0002] The synthesis and properties of rare earth complexes are one of the important contents of rare earth chemistry research, especially in the fields of luminescence, magnetism, catalysis, and gas adsorption of complexes, which are current research hotspots. The complexes of samarium, europium, terbium, and dysprosium among the rare earth elements have good photoluminescent properties in the visible region, especially the two elements of europium and terbium, when the organic ligands are selected properly, they can generate The complex has potential broad application prospects in photoluminescence and electroluminescence materials. Among them, the terbium complex emits green characteristic fluorescence of trivalent terbiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G83/00
CPCC08G83/008C09K11/06C09K2211/182
Inventor 王宏胜李公春陈新华向天成牛丽艳
Owner XUCHANG UNIV
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