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A kind of europium metal organic framework material and its preparation method and application

A metal-organic framework and material structure technology, applied in the field of fluorescent probes

Active Publication Date: 2022-04-12
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the prior art has specifically identified Fe 3+ Or fluorescent probes of nitrobenzene, but due to the specificity of fluorescent probes binding to specific target molecules or ions, currently available fluorescent probes can often only specifically recognize one or a type of substance, in other words, The reported fluorescent probes can only be used to recognize Fe 3+ Or it can only be used to identify nitrobenzene, but it can also identify Fe 3+ Fluorescent probes that can also recognize nitrobenzene have not been reported

Method used

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  • A kind of europium metal organic framework material and its preparation method and application
  • A kind of europium metal organic framework material and its preparation method and application
  • A kind of europium metal organic framework material and its preparation method and application

Examples

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preparation example Construction

[0030] The present invention also provides a method for preparing the europium metal-organic framework material described in the above technical solution, including:

[0031] Europium salt, 2,5-bis(1H-imidazol-1-yl)terephthalic acid and water are mixed for hydrothermal reaction to obtain europium metal organic framework material.

[0032] In the present invention, the europium salt preferably includes at least one of europium nitrate, europium chloride and europium perchlorate, more preferably europium nitrate. In the present invention, the above-mentioned europium salt used is water-soluble and provides the europium ions required for the europium metal-organic framework material.

[0033] In the present invention, the water is preferably deionized water. In the present invention, the deionized water provides the solvent required for the dissolution of raw materials.

[0034] In the present invention, the ratio of the amount of europium salt to 2,5-bis(1H-imidazol-1-yl)terep...

Embodiment 1

[0046] Raw material: The organic ligand is 2,5-bis(1H-imidazol-1-yl)terephthalic acid (H 2 DTA), molecular formula is C 14 N 4 o 4 h 10 ; Metal europium salt is europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O; the reaction solvent is deionized water.

[0047] Europium nitrate hexahydrate (0.1mmol, 0.043g) and H 2 DTA (0.05mmol, 0.01g) was dissolved in 5mL deionized water (europium salt and H 2 The ratio of the amount of substance of DTA is 0.1:0.05=2:1, H 2 The amount of the substance of DTA and the volume ratio of water are 0.05mmol / 5mL=0.01mmol / mL), stirred at room temperature for 0.5h, then the mixed solution was added to the stainless steel autoclave of the polytetrafluoroethylene lining of 23 milliliters, sealed ; Then the reaction kettle was placed in an oven at 180°C for 48 hours, naturally cooled to room temperature, the precipitate was collected, washed three times with deionized water, and a colorless block crystal was obtained, referred to as Eu-DTA, that ...

Embodiment 2

[0063] The operation is the same as in Example 1, the only difference is that the hydrothermal reaction kettle is replaced with a glass tube, and after the glass tube is put into the raw material, it is sealed and put into an oven, and the same operation as in Example 1 is carried out. The obtained material is the same as that in the implementation Example 1 obtained the same material.

[0064] Example 2 illustrates that the preparation method provided by the present invention can also realize the preparation of the europium metal-organic framework material provided by the present invention by replacing the hydrothermal reactor with a glass tube.

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Abstract

The invention relates to the technical field of fluorescent probes, and provides a metal organic framework material, the structural unit of which is Eu(DTA) 1.5 (H 2 O)]·H 2 O, wherein DTA is 2,5-bis(1H-imidazol-1-yl) terephthalate; the metal-organic framework material belongs to the triclinic system, space group, has a tsf-type three-dimensional topology, and is in a three-dimensional framework There are uncoordinated nitrogen and oxygen atoms in . When utilizing the material provided by the invention to carry out Fe 3+ Or when nitrobenzene is recognized, after the uncoordinated nitrogen and oxygen atoms in the molecule combine with it, the nitrogen and oxygen atoms with electron-donating ability can transfer their electrons at the highest energy level to the fluorescent group in the excited state The electron orbits vacated by the group prevent the electrons excited by light from directly transitioning to the original ground state orbitals to emit fluorescence, which leads to fluorescence quenching, thus achieving the realization of Fe 3+ or the identification of nitrobenzene.

Description

technical field [0001] The invention belongs to the technical field of fluorescent probes, and in particular relates to a europium metal organic framework material and a preparation method and application thereof. Background technique [0002] Fe 3+ It plays an important role in the metabolic process of biological systems. For example, if the iron content in the human body is too low, it will cause anemia, and if it is too high, the metabolism of trace elements such as zinc and copper will be out of balance in the body, which will affect the absorption of trace elements by the human body and make the body Decreased immunity, so the Fe in the environment 3+ detection is of great significance. At the same time, with the extensive development of industry, organic substances such as cyclohexane, dioxane, and nitrobenzene are widely used in industry. Nitrobenzene is not only highly toxic itself, but also difficult to be degraded, so it is harmful to the environment. The detect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
CPCC08G83/008C09K11/06G01N21/643G01N21/6428C09K2211/182C09K2211/1466C09K2211/1425G01N2021/6432
Inventor 刘康焦韶韶王磊李少香杜云梅马鼎璇
Owner QINGDAO UNIV OF SCI & TECH
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