A mofs material for fluorescence recognition of pertechnetate or perrhenate, its preparation method and application

A perrhenate and fluorescence recognition technology, applied in luminescent materials, chemical instruments and methods, other chemical processes, etc., can solve the problems of large adsorption capacity, poor anti-interference ability, single recognition mode, etc., and achieve strong anti-interference ability, The effect of increasing charge density and action sites and enriching adsorption sites

Active Publication Date: 2021-09-28
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the defects of single identification mode and poor anti-interference ability of pertechnetate fluorescent identification materials in the prior art, and provides an adsorption material for identifying pertechnetate or perrhenate through fluorescent color changes. The identification mode of the adsorption material It has the characteristics of strong anti-interference ability, and has a large adsorption capacity for rhenium or technetium, and is expected to expand its application in nuclear fuel wastewater systems

Method used

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  • A mofs material for fluorescence recognition of pertechnetate or perrhenate, its preparation method and application
  • A mofs material for fluorescence recognition of pertechnetate or perrhenate, its preparation method and application
  • A mofs material for fluorescence recognition of pertechnetate or perrhenate, its preparation method and application

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Embodiment 1

[0043] Take by weighing 648mg of tetrabromotetraphenylethylene, 682mg of 5-pyrimidineboronic acid, and 1.38g of potassium carbonate in 70mL of mixed solvent (THF / H 2 (0, 5 / 1) started to stir, and introduced argon at 60°C to start bubbling to remove the oxygen in the reaction system, and added 5 mol% tetrakis(triphenylphosphine)palladium to it after 1h to catalyze the reaction. After 48 hours of reaction, the reaction was complete, and the reaction solution was removed by distillation under reduced pressure, followed by extraction with dichloromethane, anhydrous Na 2 SO 4 Drying, distilling off the solvent under reduced pressure, and then separating and purifying by column chromatography gave 410 mg of the target product tetrapyrimidine tetraphenylethylene with a yield of 63.4%. Its H NMR spectrum is as figure 1 as shown, 1 H NMR (500MHz, CDCl 3 ,298K):δ=9.18(s,4H),8.93(s,8H),7.45(d,J=8.5Hz,8H),7.28(d,J=8.5Hz,8H).

[0044] (2) 7 mg of tetrapyrimidine tetraphenylethylene pr...

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Abstract

The invention relates to the technical field of nuclear fuel reprocessing, and discloses a MOFs material for fluorescence recognition of pertechnetate or perrhenate, its preparation method and application, using tetrabromotetraphenylethylene, 5-pyrimidine boronic acid and potassium carbonate as reactants , tetrakis(triphenylphosphine) palladium is used as a catalyst to prepare tetrapyrimidine tetraphenylethylene; and tetrapyrimidine tetraphenylethylene is used as a ligand to mix with silver nitrate to react to obtain the MOFs material. The MOFs material can produce obvious fluorescence changes after absorbing pertechnetate or perrhenate, and realize the recognition of pertechnetate or perrhenate through the change of fluorescence color. It is an excellent fluorescent material, and it can also effectively adsorb pertechnetate or perrhenate, and is used for adsorption and separation of pertechnetate in the post-processing of nuclear fuel.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel reprocessing, in particular to a MOFs material for fluorescent recognition of pertechnetate or perrhenate, a preparation method and application thereof. Background technique [0002] With the rapid growth of my country's economy, nuclear energy has become an important option in my country's energy structure, but the highly radioactive waste it produces may become a major bottleneck restricting the development of nuclear energy. The radiation product Tc-99, as a long-lived fission product, is mainly composed of pertechnetate (TcO) with strong water solubility and high stability. 4 - ) form exists. The current storage methods of nuclear waste such as vitrification cannot stably trap TcO 4 - , and it has a strong ability to migrate in the environment, and it has a very wide range of environmental pollution. In addition, nuclear waste is also accompanied by a large number of anions (such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06B01J20/22B01J20/30
CPCB01J20/226B01J2220/4812C09K11/06C09K2211/188
Inventor 肖成梁康康
Owner ZHEJIANG UNIV
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