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A fluorescent probe for identifying iron ions in water, its preparation method and application

A fluorescent probe, iron ion technology, applied in the field of fluorescent sensors, can solve problems such as unfavorable promotion, high detection cost, use of large-scale instruments, etc., and achieve the effects of saving capital, high sensitivity, and short detection time

Active Publication Date: 2020-10-02
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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  • A fluorescent probe for identifying iron ions in water, its preparation method and application
  • A fluorescent probe for identifying iron ions in water, its preparation method and application
  • A fluorescent probe for identifying iron ions in water, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh according to the mole ratio of 2,4,6-tris(4-pyridyl)-1,3,5-triazine (TPT) and 5-hydroxyisophthalic acid as 1:1, and after mixing, it becomes a mixed Ligand;

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

[0024] (3) The reagents weighed in (1) and (2) were sonicated or stirred in DMA / H 2 O (where DMA and H 2 The volume ratio of O is 4:4) mixed and dissolved in 8 milliliters of solvent to prepare a precursor solution;

[0025] (4) The precursor solution obtained in (3) is transferred into a hydrothermal kettle, and subjected to a solvothermal reaction at 120° C. for 72 hours, followed by suction filtration, washing and drying to obtain a three-dimensional structure Cd-MOF material.

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

[0027] Through X-ray powder diffraction, we charac...

Embodiment 2

[0030] Eu 2+ Synthesis and Application of @Cd-MOF Materials

[0031] (1) Weigh according to the mole ratio of 2,4,6-tris(4-pyridyl)-1,3,5-triazine (TPT) and 5-hydroxyisophthalic acid as 1:1, and after mixing, it becomes a mixed 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 stabili...

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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 and a preparation method and application thereof. Background technique [0002] It is well known that metal-organic frameworks (MOFs) have a wide range of 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 means of detecting metal ions. Metal ions have high complexation affinity and can well link fluorescent ligands, making the synthesis of fluorescent metal-organic frameworks simple and easy to obtain. These MOFs materials exhibit excellent properties of high sensitivity, fast detection rate, and recycling. [0003] Metal ions play an important role in the fields of environment, biology and medicine, and their co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64C09K11/06C09K11/78
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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