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A covalent organic framework fluorescent probe for iron ion detection and its preparation method

A technology of covalent organic frameworks and fluorescent probes, which is applied in fluorescence/phosphorescence, measuring devices, and material analysis through optical means, can solve the problems of lack, low sensitivity, and low detection concentration, and achieve easy operation and application The effect of wide range and good application prospect

Active Publication Date: 2021-11-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of covalent organic framework materials that can detect iron ions with high selectivity and high sensitivity.
[0003] CN 105754588 A discloses an imine-linked luminescent porous organic polymer material and a preparation method, which has a good detection effect on divalent copper ions, but the minimum detection concentration of the material for copper ions is 8mmol / L, and the sensitivity is low. high

Method used

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  • A covalent organic framework fluorescent probe for iron ion detection and its preparation method
  • A covalent organic framework fluorescent probe for iron ion detection and its preparation method
  • A covalent organic framework fluorescent probe for iron ion detection and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for synthesizing a fluorescent covalent organic framework porous polymer, the specific steps are:

[0042] At normal temperature and pressure, 1,3,5-(aminophenyl)benzene (70.29mg, 0.2mmoL) and 2,5-dihydroxyterephthalaldehyde (49.84mg, 0.3mmoL) were placed in In a 100mL reaction tube, add o-dichlorobenzene (7.5mL) and n-butanol (7.5ml) under a nitrogen atmosphere, slowly add aqueous acetic acid (1.5mL, 6mol / L) dropwise and sonicate for 10min to react the two monomers , place the reaction device at 120°C under nitrogen for 24 hours, then perform suction filtration in a sand core funnel, wash with acetone and ethanol 2-3 times during the suction filtration process, and use tetrahydrofuran as a solvent for Soxhlet extraction for 24 hours, and put it in a vacuum Dry in an oven at 60°C for 24 hours to obtain a covalent organic porous polymer powder, which is designated as Polymer-1.

[0043] The Fourier transform infrared spectrum of present example gained polymer-1...

Embodiment 2

[0046] A method for synthesizing a fluorescent covalent organic framework porous polymer, the specific steps are:

[0047]At normal temperature and pressure, 1,3,5-(aminophenyl)benzene (70.29mg, 0.2mmoL) and 2,5-dihydroxyterephthalaldehyde (49.84mg, 0.3mmoL) were placed in In a 100mL reaction tube, add o-dichlorobenzene (7.5mL) and n-butanol (7.5ml) under a nitrogen atmosphere, slowly add aqueous acetic acid (1.5mL, 6mol / L) dropwise and sonicate for 10min to react the two monomers , put the reaction device under nitrogen at 120°C for 32 hours, then perform suction filtration in a sand core funnel, wash 2-3 times with acetone and ethanol during the suction filtration process, and use tetrahydrofuran as a solvent for Soxhlet extraction for 24 hours, and put it in a vacuum Dry in an oven at 60°C for 24 hours to obtain a covalent organic porous polymer powder, which is designated as Polymer-2.

[0048] The Fourier transform infrared spectrum of present example gained polymer-2 is...

Embodiment 3

[0051] A method for synthesizing a fluorescent covalent organic framework porous polymer, the specific steps are:

[0052] At normal temperature and pressure, 1,3,5-(aminophenyl)benzene (70.29mg, 0.2mmoL) and 2,5-dihydroxyterephthalaldehyde (49.84mg, 0.3mmoL) were placed in In a 100mL reaction tube, add o-dichlorobenzene (7.5mL) and n-butanol (7.5ml) under a nitrogen atmosphere, slowly add aqueous acetic acid (1.5mL, 6mol / L) dropwise and sonicate for 10min to react the two monomers , place the reaction device at 120°C under nitrogen for 72 hours, then perform suction filtration in a sand core funnel, wash with acetone and ethanol 2-3 times during the suction filtration process, and use tetrahydrofuran as a solvent for Soxhlet extraction for 24 hours, and put it in a vacuum Dry in an oven at 60°C for 24 hours to obtain a covalent organic porous polymer powder, which is designated as Polymer-3.

[0053] The Fourier transform infrared spectrum of present example gained polymer-3...

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Abstract

The invention relates to a covalent organic framework fluorescent probe for iron ion detection and a preparation method thereof. The covalent organic framework fluorescent probe is prepared through a Schiff base reaction. The preparation process of the invention is easy to operate, the obtained probe polymer has a wide range of applications, and has good application prospects in fluorescence detection, gas adsorption, biological carriers and the like.

Description

technical field [0001] The invention belongs to the field of porous organic materials and their preparation and application, in particular to a covalent organic framework fluorescent probe for iron ion detection and a preparation method thereof. Background technique [0002] Organic porous materials have attracted much attention in recent years because of their low density, large specific surface area, adjustable pore size, and molecular designability. According to different bonding methods, organic porous materials can be divided into hypercrosslinked polymers, intrinsic microporous polymers, covalent organic frameworks, conjugated microporous polymers, porous aromatic frameworks, and conjugated triazine frameworks. Covalent organic framework is a crystalline organic porous material obtained by condensation reaction. With its good crystallinity, high specific surface area and high porosity, it has shown great potential in the fields of gas adsorption, heterogeneous catalysi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/08G01N21/64
CPCC08G12/08G01N21/6428
Inventor 廖耀祖左宏瑜李颖
Owner DONGHUA UNIV