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Preparation and application of rare-earth metal organic framework material

An organic framework and rare earth metal technology, applied in the field of preparation of rare earth metal organic framework materials, can solve problems such as mutations or malignant cells

Inactive Publication Date: 2019-11-05
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cr(III) ions are essential biological trace elements in human nutrition, but they can bind to DNA non-specifically, excessive Cr(III) ions may cause mutations or malignant cells

Method used

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  • Preparation and application of rare-earth metal organic framework material
  • Preparation and application of rare-earth metal organic framework material
  • Preparation and application of rare-earth metal organic framework material

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Embodiment Construction

[0034] The method for constructing rare earth metal organic framework materials through post-synthesis modification of the present invention will be further described through specific examples below.

[0035] Dissolve 1,4,5,8-naphthalene tetracarboxylic acid (0.1 mmol, 30.4 mg) and strontium nitrate (0.1 mmol, 21.2 mg) in ethanol (3 mL) and water (4 mL) solution, sonicate for 10 min; the mixed solution Transfer to a stainless steel high-pressure reactor, keep at 125-130 °C for 70-72 hours, filter and wash with absolute ethanol three times, and dry in the air to obtain the moment Sr-MOF;

[0036] Take Sr-MOF (100mg) and disperse it in 10ml Eu(NO 3 ) 3 ·6H 2 O aqueous solution (1mmol / L) was soaked for two days, filtered, and the obtained solid was washed completely with a large amount of distilled water to remove residual Eu 3+ ions, and then vacuum-dried at 70-80°C for 20-24 hours to obtain Eu 3+ @Sr-MOF.

[0037] Take a certain amount of Eu 3+ @Sr-MOF material, dispersed...

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Abstract

The invention provides a preparation method of a rare-earth metal organic framework material. Firstly, 1,4,5,8-naphthalenetetracarboxylic acid and strontium nitrate serve as raw materials, ethyl alcohol and water serve as solvents, and Sr-MOF is prepared through a solvothermal method; then Sr-MOF serves as a matrix framework, Eu<3+> is encapsulated into holes of Sr-MOF through post-synthesis modification, and the rare-earth metal organic framework material Eu<3+>@Sr-MOF is obtained. A Eu<3+>@Sr-MOF aqueous solution emits red fluorescence under an ultraviolet lamp. When K<+>, Na<+>, Hg<2+>, Mg<2+>, Pd<2+>, Ag<+>, Zn<2+>, Ca<2+>, Cu<2+>, Cd<2+>, Co<2+>, Ni<2+>, Fe<2+> and Cr<3+> solutions are added into the Eu<3+>@Sr-MOF aqueous solution respectively, only the addition of Cr<3+> has a good fluorescence quenching effect on the Eu<3+>@Sr-MOF solution, so that the material can be used for fluorescence detection of Cr<3+>.

Description

technical field [0001] The present invention relates to the preparation of a rare earth metal organic framework material, in particular to a method for preparing a rare earth metal organic framework material through post-synthesis modification; the present invention also relates to the rare earth metal organic framework material in fluorescence detection Cr 3+ The application of the invention belongs to the field of metal organic polymer synthesis and the field of metal ion detection. Background technique [0002] Metal-organic frameworks (MOFs), assembled by metal ions (clusters) and organic ligands, are very promising porous hybrid materials, due to their ultra-high porosity, large surface area, metal Center and functional group diversity, structured structure, adjustable structure and pore size have attracted much attention, and are widely used in catalysis, photoelectricity, gas storage and separation, adsorption, chemical sensing, fluorescence detection, drug storage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G83/00G01N21/64
CPCC08G83/008C09K11/06C09K2211/181G01N21/643G01N2021/6432
Inventor 郭昊吴宁王明玥徐梦妮杨武
Owner NORTHWEST NORMAL UNIVERSITY