A chain structure rare earth europium (iii) coordination polymer and its preparation method and application

A technology of coordination polymer and chain structure, applied in the field of fluorescent probes, achieves the effects of simple device, easy separation and purification of products, and simple operation

Active Publication Date: 2022-01-04
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 chain structure rare earth europium (iii) coordination polymer and its preparation method and application
  • A chain structure rare earth europium (iii) coordination polymer and its preparation method and application
  • A chain structure rare earth europium (iii) coordination polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 0.08mmol 2,4-bis(4-methylbenzoyl)isophthalic acid and 0.04mmol 2,5-bis(4-methylbenzoyl)terephthalic acid into a round-bottomed flask, Add a mixed solvent composed of 15ml of water and DMF (volume ratio 1:2), heat to reflux to dissolve, then add 0.09mmol of europium nitrate hexahydrate to the mixed solution, stir, continue to heat to reflux, cool, and mix the obtained The solution was transferred to a glass test tube. Add 3ml of a mixed solvent consisting of water and ethanol (volume ratio 1:2) to the liquid surface in the test tube, and then add 4ml of ethanol solution in which 0.23mmol of phenanthroline is dissolved, and the solution in the test tube is layered. The preservative film that has punched small hole is covered test tube mouth, left standstill at room temperature, obtained colorless crystal product in the middle layer of test tube after three weeks.

Embodiment 2

[0038] Add 0.07mmol 2,4-bis(4-methylbenzoyl)isophthalic acid and 0.05mmol 2,5-bis(4-methylbenzoyl)terephthalic acid into a round-bottomed flask, Add 15ml of water and DMF (volume ratio 1:2) mixed solvent, heat to reflux to dissolve, then add 0.08mmol europium nitrate hexahydrate to this mixed solution, stir, continue to heat to reflux, cool, and mix the obtained The solution was transferred to a glass test tube. On the liquid surface in the test tube, first add 3ml of a mixed solvent composed of water and methanol (volume ratio 1:2), and then add 5ml of ethanol solution in which 0.23mmol of phenanthroline is dissolved, and the solution in the test tube is layered. The preservative film that has punched aperture is covered test tube mouth, left standstill at room temperature, obtained the same crystal product as embodiment 1 in the middle layer of test tube after three weeks.

Embodiment 3

[0040] Add 0.09mmol 2,4-bis(4-methylbenzoyl)isophthalic acid and 0.04mmol 2,5-bis(4-methylbenzoyl)terephthalic acid into a round bottom flask, Add 15ml of water and DMF (volume ratio 1:2) mixed solvent, heat to reflux to dissolve, then add 0.08mmol europium nitrate hexahydrate to this mixed solution, stir, continue to heat to reflux, cool, and mix the obtained The solution was transferred to a glass test tube. On the liquid surface in the test tube, first add 3ml of a mixed solvent composed of water and methanol (volume ratio 1:2), and then add 6ml of methanol solution in which 0.23mmol of phenanthroline is dissolved, and the solution in the test tube is layered. The preservative film that has punched aperture is covered test tube mouth, left standstill at room temperature, obtained the same colorless crystal product as embodiment 1 in the middle layer of test tube after three weeks.

[0041] For the molecular structure of the chain structure rare earth europium (III) coordin...

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Abstract

The invention discloses a rare earth europium (III) coordination polymer with a chain structure and its preparation method and application. The structural expression of the rare earth europium (III) coordination polymer with a chain structure is: [Eu(C 24 h 16 o 6 ) 1.5 (C 12 h 8 N 2 ) 2 1.35(C 3 h 7 NO)] n , its preparation method is: 2,4-bis(4-methylbenzoyl) isophthalic acid and 2,5-bis(4-methylbenzoyl) terephthalic acid are dissolved in water and mixed with DMF Europium salt is added to the solvent, after reflux reaction, cooling, firstly adding alcohol and water mixed solvent into the reaction solution, then adding o-phenanthroline ethanol solution, the liquid surface is layered, volatilized and crystallized, and the product is obtained. Chain structure rare earth europium (III) coordination polymer has strong fluorescence properties, and in 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 invention relates to a fluorescent probe, in particular to a 2,4-bis(4-methylbenzoyl)isophthalate, 2,5-bis(4-methylbenzoyl)terephthalate A rare earth europium (III) coordination polymer with a chain structure formed by coordination of formate and o-phenanthroline as ligands and metal europium ions, and also relates to its preparation method and its use in fluorescence detection of 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/643G01N2021/6432G01N2021/6419G01N2021/6421
Inventor 杨颖群
Owner HENGYANG NORMAL UNIV
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