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MOFs fluorescence probe for detecting tetrabromobisphenol A, preparation method and application

A fluorescent probe, tetrabromobisphenol technology, applied in the directions of fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of high cost, complicated instruments and equipment, limited wide application, etc., and achieves low cost and preparation. The method is simple and the application prospect is good

Active Publication Date: 2019-08-27
BEIJING UNIV OF TECH
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  • Summary
  • 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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  • MOFs fluorescence probe for detecting tetrabromobisphenol A, preparation method and application
  • MOFs fluorescence probe for detecting tetrabromobisphenol A, preparation method and application
  • MOFs fluorescence probe for detecting tetrabromobisphenol A, preparation method and application

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preparation example Construction

[0040] A kind of preparation method of described MOFs fluorescent probe that is used to detect tetrabromobisphenol A comprises the following steps:

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

[0042] Dissolve 2,5-dihydroxyterephthalic acid and divalent zinc salt or divalent zinc salt hydrate in DMF solution respectively, then slowly add 2,5-dihydroxyterephthalic acid solution to divalent zinc salt or divalent zinc salt hydrate solution, stirred at room temperature to obtain yellow solid MOF-74 (Zn), cleaned;

[0043] Preparation of S2, 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, every 131 mg of...

Embodiment 1

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

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

[0063] 2,5-dihydroxyterephthalic acid (239mg, 1.20mmol) and Zn(OAc) 2 2H 2 O (686 mg, 3.12 mmol) was dissolved in 20 ml of DMF solution, and 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 the described step S1 comprises the following steps:

[0065] S11. Wash 100 mg of freshly prepared MOF-74(Zn) three times with 20 ml of N,N-dimethylformamide (DMF), and then soak in 20 ml of methanol solution to remove the MOFs-74(Zn) The residual ligand 2,5-dihydroxyterephthalic acid and DMF should be 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 supernat...

Embodiment 2

[0071] To explore the influence of MOF-74(Zn)-en concentration, the sensitivity detection of TBBPA (150ppb) by MOF-74(Zn)-en solutions with concentrations of 80, 100, 125, 160, 200, 300, and 375ppm was studied respectively. like image 3 As shown, the photoluminescence enhancement rate (expressed by F / F0, where F0 and F are the photoluminescence intensity before and after adding TBBPA respectively) increases with the concentration of MOF-74(Zn)-en solution in the range of 80-300ppm , and then the enhancement factor decreases slightly as the concentration increases, so MOF-74(Zn)-en has the highest selectivity at 300ppm. Therefore, in further research, 300ppm MOF-74(Zn)-en solution was finally selected for the determination of TBBPA.

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Abstract

The invention relates to an MOFs (metal-organic framework) fluorescence probe for detecting tetrabromobisphenol A. The MOFs fluorescence probe is a metal-organic framework material MOF-74(Zn)-en shownas formula (1), wherein MOF-74(Zn)-en is an infinite network material formed by connecting MOF-74(Zn) with ethidene diamine (en) in a coordination bond manner. Tetrabromobisphenol A molecules have asignificant fluorescence enhancement effect on a prepared fluorescence material, and the preparation method is simple, low in cost, high in effect and good in application prospect.

Description

technical field [0001] The invention relates to a preparation technology for a rapid detection material of environmental pollutants, in particular to a fluorescent probe for detecting tetrabromobisphenol A, its preparation method and application. 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 analysis process, and it has 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, increasing attention has been paid to nanomaterials and nanotechnology to develop new materials for biorecognition and signal transduction components. To address these issu...

Claims

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Application Information

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Patent Type & Authority Applications(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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