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Lanthanide metal organic framework with polyrotaxane configuration as well as preparation method and application thereof

A lanthanide metal, organic framework technology, applied in instruments, analytical materials, measuring devices, etc., can solve problems such as health problems, and achieve the effects of simple preparation methods, great application prospects, and flexible coordination methods

Active Publication Date: 2016-03-23
芜湖数字信息产业园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, nitrobenzene can be a notorious environmental pollutant that can cause dire health problems

Method used

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  • Lanthanide metal organic framework with polyrotaxane configuration as well as preparation method and application thereof
  • Lanthanide metal organic framework with polyrotaxane configuration as well as preparation method and application thereof
  • Lanthanide metal organic framework with polyrotaxane configuration as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Lanthanide Metal Organic Framework of Polyrotaxane Configuration

[0031] (1) V-type rigid bidentate carboxylic acid ligands (H 2 mtpc) preparation

[0032] 1) Take 19.7ml of m-xylene in a two-necked bottle, add 0.2g of iodine to dissolve, take an ice-water bath, add 54.6g of bromine water dropwise under dark conditions, and react for 1 hour. After reacting at room temperature for 16 hours, add 20ml of 20% KOH solution, shake slightly with heat until the yellow color disappears, cool to room temperature, filter, wash with water, and recrystallize with ethanol to obtain the intermediate product A (1,5-dibromo-2, 4-dimethylbenzene).

[0033] 2) Put the intermediate product A (2g), 4-methoxycarboxyphenylboronic acid (3.4g), tetrakistriphenylphosphine palladium (0.2g), and cesium fluoride (3g) in a two-necked bottle, vacuum and nitrogen for 30min , add 100ml of anhydrous dimethyl ether (DME) to it, reflux reaction for 72h under the protection of nitrogen, cool ...

Embodiment 2

[0038] Example 2 Detection of nitrobenzene by lanthanide metal-organic framework in polyrotaxane configuration

[0039] The polyrotaxane-configured lanthanide metal-organic framework prepared in Example 1 was used as a fluorescent probe to detect nitrobenzene.

[0040] 1) Selection of solvent

[0041]Take 4 mL each of methanol, DMF, water, ethanol, DMAC, and nitrobenzene solvents, add 1 mg of lanthanide metal-organic framework crystals in the polyrotaxane configuration that are uniformly ground, and mix well at room temperature. The fluorescence intensity of each solution was detected with a fluorescence spectrophotometer. The result is as Image 6 As shown, the fluorescence intensity peaks of the characteristic peaks in the figure are the solutions of methanol, DMF, water, ethanol, DMA, and nitrobenzene from top to bottom. Depend on Image 6 It can be seen that the polyrotaxane-configured lanthanide MOF crystals have the strongest fluorescence in methanol solvent, while t...

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Abstract

The present invention relates to a lanthanide metal organic framework with a polyrotaxane configuration as well as a preparation method and application thereof. The adopted technical scheme comprises the following steps: adding Ln(NO3) 3, H2mtpc and solvents such as N,N-dimethylacetamide and water to a container, and stirring the mixture at room temperature; sealing the container and placing the container into an oven for 3 days under the temperature of 300-400K; slowly cooling the container to room temperature to obtain a colorless transparent bulk crystal; and washing the bulk crystal with N,N-dimethylacetamide, filtering and drying the bulk crystal to obtain a target product. The Ln III metal based organic framework prepared by the present invention is used as a fluorescent probe, and nitrobenzene can be efficiently and selectively sensed.

Description

technical field [0001] The present invention relates to a polyrotaxane configuration lanthanide metal organic framework and a preparation method thereof, in particular to a preparation of a polyrotaxane configuration based lanthanide metal organic framework with a fluorescent probe function and its preparation method. application. Background technique [0002] Metal-organic frameworks (MOFs) have attracted considerable attention in recent years due to their fascinating structural diversity and interesting properties (gas adsorption, photoluminescence, magnetism, catalysis, etc.). Multifunctional metal-organic frameworks with properties such as luminescence, magnetism, and high porosity have received special attention as chemical sensors. The construction of metal-organic frameworks with special structures and functions through the design and selection of organic linkers and metal units is also a topic of continuous exploration in this field. [0003] Based on safety and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/007G01N21/6428G01N2021/6432
Inventor 韩正波曹小漫高明亮孙志佳
Owner 芜湖数字信息产业园有限公司