Fluorescence probe for recognizing iron ions in water body and preparation method and application thereof

A technology of fluorescent probes and iron ions, applied in the field of fluorescent sensors, can solve the problems of unfavorable promotion, high detection cost, and the use of large instruments, and achieve the effects of saving capital, high sensitivity, and short detection time

Active Publication Date: 2018-09-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, atomic luminescence and absorption spectroscopy are mainly used for the detection of metal ions. This method has high sensitivity and high accuracy, but it needs to use large instruments, and the detection cost is high, which is not conducive to widespread promotion.

Method used

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  • Fluorescence probe for recognizing iron ions in water body and preparation method and application thereof
  • Fluorescence probe for recognizing iron ions in water body and preparation method and application thereof
  • Fluorescence probe for recognizing iron ions in water body and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh according to the 1:1 molar ratio of 2,4,6-tris(4-pyridyl)-1,3,5-triazine (TPT) to 5-hydroxyisophthalic acid, and mix to form a mixture Ligand;

[0023] (2) According to Cd(NO 3 ) 2 .4H 2 Weigh Cd(NO 3 ) 2 4H 2 O;

[0024] (3) Put the reagents weighed in (1) and (2) in DMA / H under ultrasonic or stirring 2 O (where DMA and H 2 The volume ratio of O is 4:4) mixed and dissolved in 8 milliliters of solvents to prepare a precursor solution;

[0025] (4) Transfer the precursor solution obtained in (3) into a hydrothermal kettle, perform solvothermal reaction at 120°C for 72 hours, suction filter, wash, and dry to obtain a three-dimensional structure Cd-MOF material.

[0026] (5) Add 3 mg of Cd-MOF in (4) to 3 ml of 0.1 mol / L Eu(NO 3 ) 3 solution, stirred for 48 hours, suction filtered, and dried to obtain Eu 2+ @Cd-MOF probe material.

[0027] By X-ray powder diffraction, we characterized the stability of the material as figure 1 As shown, after the "po...

Embodiment 2

[0030] Eu 2+ Synthesis and application of @Cd-MOF materials

[0031] (1) Weigh according to the 1:1 molar ratio of 2,4,6-tris(4-pyridyl)-1,3,5-triazine (TPT) to 5-hydroxyisophthalic acid, and mix to form a mixture Ligand;

[0032] (2) According to Cd(NO 3 ) 2 .4H 2 Weigh Cd(NO 3 ) 2 .4H 2 O;

[0033] (3) Put the reagents weighed in (1) and (2) in DMA / H under ultrasonic or stirring 2 O (its volume ratio is 4:4) mixed and dissolved in 8 milliliters of solvents to prepare a precursor solution;

[0034] (4) Transfer the precursor solution obtained in (3) into a hydrothermal kettle, perform solvothermal reaction at 120°C for 72 hours, suction filter, wash, and dry to obtain a rod-like crystalline material Cd-MOF.

[0035] (5) Add 3 mg of Cd-MOF material in (4) to 3 ml of 0.1 mol / L Eu(NO 3 ) 3 solution, stirred for 48 hours, suction filtered, and dried to obtain Eu 2+ @Cd-MOF probe material.

[0036] By X-ray powder diffraction, we characterized the stability of the mate...

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Abstract

The invention discloses a fluorescence probe for recognizing iron ions in a water body and a preparation method and an application thereof. The preparation method of the invention includes the following steps of: 1) dispersing TPT, OH-H<2>BDC and cadmium nitrate tetrahydrate in a mixed solvent composed of DMA and water to prepare a precursor solution; 2) preparing a Cd-MOF material by subjecting the precursor solution to a solvothermal reaction; and 3) adding the Cd-MOF material to a Eu<3+> solution, and obtaining the fluorescence probe with Eu<2+> load through stirring, suction filtration anddrying, wherein Eu<3+> is "in-situ reduced" into Eu<2+> ions with specific blue emission during a functional "post-modification" process. The preparation method of the invention is simple, and the production rate is high; and a test sample of the fluorescence probe does not need pretreatment or the pretreatment is simple, the recognition on Fe<3+> ions is sensitive, the fluorescence quenching rate can reach 99%, and the fluorescence probe can be used for recognizing and detecting the Fe<3+> ions in the water body.

Description

technical field [0001] The invention belongs to the technical field of fluorescent sensors, and relates to a fluorescent probe, in particular to a fluorescent probe for identifying iron ions in water bodies, a preparation method and application thereof. Background technique [0002] Metal-organic frameworks (MOFs) are well known for their broad applications in molecular storage, separation, and catalysis. A variety of selectable and uniform porosity, high specific surface area, and discernible luminescence changes make fluorescent metal-organic frameworks a tool for the detection of metal ions. Metal ions have high complexation affinity, which can be well linked to fluorescent ligands, making the synthesis of fluorescent metal-organic framework materials easy and easy to obtain. These MOFs materials exhibit excellent characteristics of high sensitivity, fast detection rate and recycling. [0003] Metal ions play an important role in the fields of environment, biology and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/78G01N21/64
CPCC09K11/06C09K11/7728C09K2211/188G01N21/64G01N21/6428G01N21/643G01N2021/6417G01N2021/6432
Inventor 张建勇邓维史军霞谷荣彩崔鹏辉
Owner SHANGHAI INST OF TECH
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