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Fluorescent array sensor for distinguishing and detecting metal ions and preparation method thereof

An array sensor and metal ion technology, applied in the field of array sensing, can solve the problems of complex preparation and high detection cost, and achieve the effects of simple construction method, reduced test cost, and avoidance of molecular aggregation and quenching.

Active Publication Date: 2020-12-04
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, fluorescent probes are widely used due to their characteristics of fast, accurate, simple and efficient, and suitable for real-time in-situ detection. However, the synthesis of multiple combined array sensing units is not only complicated to prepare, but also expensive to detect.

Method used

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  • Fluorescent array sensor for distinguishing and detecting metal ions and preparation method thereof
  • Fluorescent array sensor for distinguishing and detecting metal ions and preparation method thereof
  • Fluorescent array sensor for distinguishing and detecting metal ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 75mg of aluminum chloride hexahydrate and 75mg of 2,2'-bipyridyl-5,5'-dicarboxylic acid in 5mL and 7.5mL of DMF, respectively, ultrasonication for 30min, and then magnetic stirring for 30min, and the obtained mixed solution Place it in a 20mL polytetrafluoroethylene reactor, and place it in an oven at 120°C for 24h. Naturally cooled to room temperature, washed three times with DMF to obtain a metal-organic framework material.

[0033] Take 20 mg of metal-organic framework material and put it into a small glass bottle filled with 10 mL of methanol, and add 3,3'-diethyloxacarbocyanine iodine dye and europium nitrate hexahydrate at a concentration of 1×10 -5 、10 -4 M. The glass bottle was placed in an oven at 60° C. for 24 hours, cooled to room temperature, and washed three times with methanol to obtain a fluorescent array sensor.

[0034] Such as figure 2 As shown, under the excitation of ultraviolet light, the aqueous solution of the material presents three...

Embodiment 2

[0036] Dissolve 56mg of zinc nitrate hexahydrate and 64mg of 2,2'-bipyridine-5,5'-dicarboxylic acid in 15mL of DMA, and after ultrasonication for 10min, transfer the resulting mixed solution into a 20mL polytetrafluoroethylene reactor , and placed in a 130°C oven for 48h. Naturally cooled to room temperature, washed three times with DMA to obtain a metal-organic framework material.

[0037] Take 30 mg of metal-organic framework material and add it into a small glass bottle containing 10 mL of DMA, and add coumarin 6 and europium nitrate hexahydrate at a concentration of 2×10 -5 , 2×10 -4 M. The glass bottle was placed in an oven at 65° C. for 36 h, cooled to room temperature, and washed three times with DMA to obtain a fluorescent array sensor.

[0038]Under the excitation of ultraviolet light, the aqueous solution of the material presents three luminescent centers, corresponding to the organic ligand (413nm), the dye molecule (540nm), the Eu 3+ (614nm) emission. The synt...

Embodiment 3

[0040] Dissolve 62mg of zirconium chloride and 40mg of 4,4'-[(2,2'-bipyridine)-5,5'-diyl]dibenzoic acid in 12mL of DMF, and after ultrasonication for 10min, add 2mL of ethanol to The obtained mixed solution was transferred into a 20mL polytetrafluoroethylene reactor, and placed in an oven at 100°C for 72h. Naturally cooled to room temperature, washed three times with DMF to obtain a metal-organic framework material.

[0041] Take 25 mg of metal-organic framework material and put it into a small glass bottle filled with 10 mL of DMF, and add coumarin 6 and samarium nitrate hexahydrate at a concentration of 1×10 -5 , 6×10 -4 M. The glass bottle was placed in an oven at 70° C. for 36 h, cooled to room temperature, and washed three times with DMF to obtain a fluorescent array sensor.

[0042] Under the excitation of ultraviolet light, the aqueous solution of the material presents three luminescent centers, corresponding to the organic ligand (430nm), dye molecule (535nm), Eu 3...

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Abstract

The invention discloses a fluorescent array sensor for distinguishing and detecting metal ions and a preparation method of the fluorescent array sensor. The fluorescence array sensor with a pluralityof sensing units is constructed by taking each light-emitting center as a sensing unit by utilizing the characteristics of multiple pores and multiple light-emitting centers of a metal organic framework material, the method comprises the following steps: introducing a green light or yellow light dye with fluorescence response to metal ions and rare earth ions into pores of a metal organic framework material, the fluorescence array sensor comprises the following components in percentage by mass: 98 to 99.99 percent of metal organic framework material, 0.005 to 1 percent of dye and 0.005 to 1 percent of rare earth ions. The preparation method comprises the following steps: 1, preparing a metal organic framework material, and 2, loading dye or rare earth ions.By constructing the array sensorin a single material, the problems that a traditional specific sensor is complex in design and poor in selectivity are solved, and the preparation and detection cost is reduced. In addition, the fluorescence array sensor can be used for quickly, efficiently and accurately distinguishing metal ions.

Description

technical field [0001] The invention relates to the technical field of array sensing, in particular to a fluorescent array sensor for distinguishing and detecting metal ions and a preparation method thereof. Background technique [0002] Excessive metal ions in aqueous solution will not only cause great pollution to the ecological environment, but also accumulate in the human body through the biological chain, posing a great threat to human health. In recent years, more and more diseases have been found to be related to metal ions. Therefore, there is an increasing demand for convenient, efficient and sensitive metal ion detection equipment. [0003] Existing methods for detecting metal ions include inductively coupled plasma mass spectrometry, atomic absorption spectrometry, and the like. Although these methods can achieve high accuracy, they all require expensive equipment and cumbersome operations, and are not suitable for on-site, rapid and portable detection. At pres...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/06C08G83/00G01N21/64
CPCC08G83/008C09K11/025C09K11/06C09K2211/1088C09K2211/1466C09K2211/182G01N21/6428G01N2021/6441
Inventor 崔元靖关玲玲钱国栋杨雨
Owner ZHEJIANG UNIV
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