Polycarboxylic acid and europium complex luminescent material and preparation method thereof

A technology of europium complex and luminescent material, applied in the field of polycarboxylic acid and europium complex luminescent material and preparation thereof, to achieve the effect of enriching three-dimensional network structure

Active Publication Date: 2017-11-24
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Eu 3+ There are 6 4f electrons in the outermost layer, which are easy to form 8 or 9 coordination. There are three types of organic ligands coordinated by metal europium, namely carboxylic acids, heterocyclics and heterocyclic carboxylic acids. Pyridine carboxylic acid belongs to heterocyclic carboxylic acid A kind of acid ligand, i

Method used

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  • Polycarboxylic acid and europium complex luminescent material and preparation method thereof
  • Polycarboxylic acid and europium complex luminescent material and preparation method thereof
  • Polycarboxylic acid and europium complex luminescent material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Take 0.0167 g of 3,5-pyridinedicarboxylic acid and 0.0408 g of potassium hydrogen phthalate, pipette 5 mL of europium (Eu) perchlorate (0.040 mol L -1 ) in the reactor, add 5 mL of deionized water to the reactor, and use 1 mol·L -1 Potassium hydroxide adjusted the pH to 5. Then, it was placed in an oven at 180°C for 72 hours, and the temperature was lowered at 2°C per hour to obtain colorless crystals with complexes, which were washed with absolute ethanol, dried in the air, and collected.

[0023] The invention relates to the test and analysis of the fluorescence spectrum of a coordination polymer.

[0024] The present invention has developed a three-dimensional coordination polymer synthesized with europium perchlorate, 3,5-pyridinedicarboxylic acid, and potassium hydrogen phthalate. Experiments have proved that the polymer has good fluorescent properties and can be used in fluorescent materials field.

[0025] The invention further discloses the steric structure ...

Embodiment 2

[0028] Take 0.0167 g of 3,5-pyridinedicarboxylic acid and 0.03672 g of potassium hydrogen phthalate, pipette 5 mL of europium (Eu) nitrate (0.040 mol L -1 ) in the reactor, add 5 mL of deionized water to the reactor, and use 1 mol·L -1 Sodium hydroxide was used to adjust the pH to 5. Then, it was placed in an oven at 180°C for 72 hours, and the temperature was lowered at 2°C per hour to obtain colorless crystals of the europium complex, which were washed with absolute ethanol, dried in the air, and collected.

Embodiment 3

[0030] Take 0.01336g of 3,5-pyridinedicarboxylic acid and 0.0408 g of potassium hydrogen phthalate, pipette 5 mL of europium (Eu) chloride (0.040 mol L -1 ) in the reactor, add 5 mL of deionized water to the reactor, and use 1 mol·L -1 Sodium hydroxide was used to adjust the pH to 5. Then, it was placed in an oven at 180°C for 72 hours, and the temperature was lowered at 2°C per hour to obtain colorless crystals of the europium complex, which were washed with absolute ethanol, dried in the air, and collected.

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Abstract

The invention discloses a polycarboxylic acid and europium complex luminescent material and a preparation method thereof. The complex luminescent material is a three-dimensional coordination polymer containing two types of organic polycarboxylic acid anion ligand, and the general formula of the three-dimensional coordination polymer is [Eu2(1, 2-bdc)2(3, 5-pdc) (H2O)4]n, wherein 1, 2-bdc is phthalic acid di-anion; 3, 5-pdc is 3, 5-pyridinedicarboxylic acid di-anion; n is natural number not less than 100. The preparation method comprises the following steps: weighting 3, 5-pyridinedicarboxylic acid and potassium acid phthalate or phthalic acid, wherein the amount ratio of 3, 5-pyridinedicarboxylic acid substance to potassium acid phthalate or phthalic acid substance is 0.00008-0.00012mol to 0.00016-0.00024mol; adding deionized water to an europium compound; regulating the pH value to be 4-6; transferring into an oven to react for 48-80h; then decreasing the temperature at the speed of 1-5 DEG C per hour, wherein an europium complex obtained when the temperature is decreased to be less than 100 DEG C is a colorless crystal; then washing with absolute ethyl alcohol to obtain the complex luminescent material.

Description

technical field [0001] The invention relates to a preparation method for synthesizing a three-dimensional coordination polymer by reacting europium perchlorate, 3,5-pyridinedicarboxylic acid and potassium hydrogen phthalate 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. Wherein, the europium complex emits red characteristic fluorescence...

Claims

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Application Information

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IPC IPC(8): C07F3/00C09K11/06
CPCC07F3/003C09K11/06C09K2211/182
Inventor 王宏胜李公春张万强向天成陈新华
Owner XUCHANG UNIV
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