A kind of network structure rare earth europium (iii) coordination polymer and its preparation method and application

A technology of coordination polymer and network structure, applied in the field of fluorescent probes, achieves the effects of simple device and operation, easy separation and purification of products, good fluorescence intensity and monochromaticity

Active Publication Date: 2022-02-11
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of rare earth complex fluorescent probes to detect Fe 3+ There are relatively few reports about

Method used

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  • A kind of network structure rare earth europium (iii) coordination polymer and its preparation method and application
  • A kind of network structure rare earth europium (iii) coordination polymer and its preparation method and application
  • A kind of network structure rare earth europium (iii) coordination polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 0.13mmol of 2,5-bis(4-methylbenzoyl)terephthalic acid to a round-bottomed flask, add 12mL of water and DMF (volume ratio 1:5) mixed solvent, add sodium hydroxide Adjust the pH of the solution to 5-6, heat to reflux to dissolve it, then add 0.08 mmol of europium nitrate hexahydrate to the mixed solution, continue heating to reflux, cool, and transfer the obtained mixed solution into a glass test tube. On the liquid surface in the test tube, first add 3 mL of a mixed solvent composed of water and ethanol (volume ratio 1:2), and then add 4 mL of ethanol solution in which 0.10 mmol o-phenanthroline is dissolved, and the solution in the test tube is divided into three layers. Cover the mouth of the test tube with a preservative film with small holes, let it stand at room temperature, and obtain a colorless crystal product in the lower layer of the test tube after two weeks.

Embodiment 2

[0040] Add 0.11mmol of 2,5-bis(4-methylbenzoyl)terephthalic acid to a round bottom flask, add 12mL of water and DMF (volume ratio 1:5) mixed solvent, add sodium hydroxide Adjust the pH of the solution to 5-6, heat to reflux to dissolve it, then add 0.10 mmol of europium nitrate hexahydrate to the mixed solution, continue to heat and reflux, cool, and transfer the obtained mixed solution into a glass test tube. On the liquid surface in the test tube, first add 3 mL of a mixed solvent composed of water and methanol (volume ratio 1:2), and then add 5 mL of ethanol solution in which 0.10 mmol o-phenanthroline is dissolved, and the solution in the test tube is divided into three layers. The preservative film that has punched aperture covers test tube mouth, leaves standstill at room temperature, obtains the same product as embodiment 1 at the lower floor of test tube after two weeks.

Embodiment 3

[0042] Add 0.15mmol 2,5-bis(4-methylbenzoyl)terephthalic acid to a round bottom flask, add 12mL of water and DMF (volume ratio 1:5) mixed solvent, add sodium hydroxide Adjust the pH of the solution to 5-6, heat to reflux to dissolve it, then add 0.06 mmol of europium nitrate hexahydrate to the mixed solution, continue heating to reflux, cool, and transfer the obtained mixed solution into a glass test tube. On the liquid surface in the test tube, first add 3 mL of a mixed solvent composed of water and methanol (volume ratio 1:2), and then add 6 mL of methanol solution in which 0.10 mmol o-phenanthroline is dissolved, and the solution in the test tube is divided into three layers. The preservative film that has punched aperture is covered test tube mouth, left standstill at room temperature, obtains the same product as embodiment 1 in the lower floor of test tube after two weeks.

[0043] For the molecular structure of the network structure rare earth europium (III) coordination...

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Abstract

The invention discloses a network structure rare earth europium (III) coordination polymer as well as a preparation method and application thereof. The network structure rare earth europium (III) coordination polymer has the following chemical expression: [Eu 2 (C 24 h 16 o 6 ) 3 (C 3 h 7 NO) 6 ·(C 3 h 7 NO)(H 2 O)] n . The preparation method is as follows: adding 2,5-bis(4-methylbenzoyl)terephthalic acid into a mixed solvent of water and DMF, adjusting the pH of the solution system to 5-6, reflux reaction, and then adding europium salt, After continuing the reflux reaction, cool down, first add alcohol-water mixed solvent to the reaction solution, and then add the ethanol solution of o-phenanthroline, the liquid surface is layered, volatilized and crystallized, and the product is obtained. The rare earth europium(III) coordination polymer with network structure has strong fluorescence properties, and the Fe 3+ The characteristic of fluorescence quenching under the action can be used as a fluorescent probe for the fluorescence detection of ferric ions in complex metal ion solution systems, and has the characteristics of good selectivity and high sensitivity.

Description

technical field [0001] The present invention relates to a fluorescent probe, in particular to a network structure rare earth europium formed by coordination of 2,5-bis(4-methylbenzoyl) terephthalate and DMF as a ligand with metal europium ions (III) coordination polymer, also relates to its preparation method and in fluorescence detection Fe 3+ The application in this field belongs to the field of sensor technology. Background technique [0002] Fluorescent chemical sensors refer to the substances whose fluorescence spectrum changes significantly with the addition of the analyte to the system. Fluorescent chemical sensors have been widely used in the detection of metal ions in the environment and organisms due to their high sensitivity, convenient detection, rapidity and low cost. [0003] Iron element has an important influence on living organisms and plays an important role in biological systems. Iron is closely related to human life activities: it has the function of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06G01N21/6428G01N21/643G01N21/6486G01N2021/6432C09K2211/182C09K2211/1425
Inventor 杨颖群
Owner HENGYANG NORMAL UNIV
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