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A kind of mofs fluorescent probe for detecting tetrabromobisphenol A, preparation method and application

A technology of tetrabromobisphenol and fluorescent probe, which is applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of restricting wide application, high cost, complex instruments and equipment, etc., and achieve good application prospects, The effect of low cost and simple preparation method

Active Publication Date: 2022-06-28
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above method is sensitive and accurate, the instruments and equipment are complicated, the cost is high, a large amount of sample preparation is required, and professional personnel are required to operate
Therefore, the wide application of the above method is limited

Method used

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  • A kind of mofs fluorescent probe for detecting tetrabromobisphenol A, preparation method and application
  • A kind of mofs fluorescent probe for detecting tetrabromobisphenol A, preparation method and application
  • A kind of mofs fluorescent probe for detecting tetrabromobisphenol A, preparation method and application

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preparation example Construction

[0040] A method for preparing a MOFs fluorescent probe for detecting tetrabromobisphenol A, comprising the following steps:

[0041] Preparation of S1 and MOF-74(Zn)

[0042] Dissolve 2,5-dihydroxyterephthalic acid and divalent zinc salt or divalent zinc salt hydrate separately in DMF solution, then slowly add 2,5-dihydroxyterephthalic acid solution to divalent zinc salt Or in the solution of divalent zinc salt hydrate, stir at room temperature to obtain yellow solid MOF-74(Zn), wash clean;

[0043] Preparation of S2 and MOF-74(Zn)-en

[0044]The cleaned MOF-74(Zn) was added to the solution of ethylenediamine (en), stirred at room temperature, filtered, washed and dried at room temperature to obtain the fluorescent probe MOF-74(Zn)-en.

[0045] Preferably, the molar ratio of 2,5-dihydroxyterephthalic acid and divalent zinc salt or divalent zinc salt hydrate described in step S1 is (0.8-1.2): (2.5-3.7); preferably 1.2: 3.12;

[0046] In the step S2, each 131 mg of MOF-74 (Z...

Embodiment 1

[0061] The preparation method of MOFs fluorescent probe includes the following steps:

[0062] Preparation of S1 and MOF-74(Zn)

[0063] 2,5-Dihydroxyterephthalic acid (239 mg, 1.20 mmol) and Zn(OAc) 2 ·2H 2 O (686 mg, 3.12 mmol) were respectively dissolved in 20 ml of DMF solution, then 2,5-dihydroxyterephthalic acid solution was slowly added to Zn(OAc) 2 ·2H 2 O solution, stirred at room temperature for 18 h to obtain 269.5 mg of yellow solid MOF-74(Zn), which was cleaned.

[0064] The cleaning method of MOF-74 (Zn) in described step S1 comprises the following steps:

[0065] S11. Wash 100 mg of freshly prepared MOF-74(Zn) with 20 ml of N,N-dimethylformamide (DMF) three times, and then soak in 20 ml of methanol solution to remove the MOFs-74(Zn) The residual ligand 2,5-dihydroxyterephthalic acid and DMF are dried at room temperature at 20-30°C.

[0066] S12. Soak the MOF-74(Zn) obtained in step S11 in 20ml of water at a temperature of 20-30°C for 30min to remove the su...

Embodiment 2

[0071] To explore the effect of MOF-74(Zn)-en concentration, the sensitivity of MOF-74(Zn)-en solution with concentrations of 80, 100, 125, 160, 200, 300, and 375 ppm to TBBPA (150 ppb) was investigated. like image 3 As shown, the photoluminescence enhancement ratio (expressed as F / F0, where F0 and F are the photoluminescence intensities before and after the addition of TBBPA, respectively) increased with the concentration of MOF-74(Zn)-en solution in the range of 80-300 ppm , and then the enhancement factor decreased slightly with the increase of concentration, so the highest selectivity was found in MOF-74(Zn)-en at 300 ppm. Therefore, in the further study, 300ppm MOF-74(Zn)-en solution was finally chosen to measure TBBPA.

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Abstract

The present invention relates to the MOFs fluorescent probe that is used for detecting tetrabromobisphenol A, described MOFs fluorescent probe is MOF-74(Zn)-en shown in metal organic framework material formula (1), described MOF-74( Zn)‑en is an infinite network structure material formed by the connection of MOF‑74(Zn) and ethylenediamine (en) through coordination bonds. The tetrabromobisphenol A molecular pair has a remarkable fluorescence enhancement effect on the prepared fluorescent material, and has the advantages of simple preparation method, low cost, high effect and good application prospect.

Description

technical field [0001] The invention relates to a preparation technology of a material for rapid detection of environmental pollutants, in particular to a fluorescent probe for detecting tetrabromobisphenol A, a preparation method and application thereof. Background technique [0002] The importance of biological / chemical sensors in analytical science has been widely accepted, and the development of portable analytical equipment can simplify and miniaturize the entire analytical process with ease of use, good selectivity, high sensitivity and short analysis time, etc. advantage. However, the design of bio / chemical sensors suffers from two major limitations. One is the instability of biosensing components, and the second is how to obtain physicochemical sensors as small as possible. To address these issues, there is an increasing focus on nanomaterials and nanotechnology to develop new materials for biorecognition and signal transduction elements. To address these issues, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C08G83/00G01N21/64
CPCC09K11/06C08G83/008G01N21/643C09K2211/188
Inventor 张晓雷李素梅陈莎冯帆胡博白金泉
Owner BEIJING UNIV OF TECH
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