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A terbium-based metal-organic framework material, preparation method and application thereof

A technology of metal-organic frameworks and organic frameworks, applied in the direction of organic chemical methods, preparation of organic compounds, 3/13 organic compounds without C-metal bonds, etc., can solve hereditary genetic defects, environmental persistent hazards, lethal Problems such as aquatic organisms, to achieve the effect of good reproducibility, low requirements for reaction conditions, and easy implementation

Active Publication Date: 2017-07-11
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dichromate is widely used in industries such as corrosion inhibitors, metal passivators, and bactericidal preservatives; however, the harm of dichromate to the environment and the human body cannot be ignored, and dichromate is a sensitizer source, is also a primary carcinogen, and is more likely to cause inherited genetic defects
Experiments have proved that dichromic acid in water with a content of more than 10ppm can kill aquatic organisms and cause persistent harm to the environment.

Method used

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  • A terbium-based metal-organic framework material, preparation method and application thereof
  • A terbium-based metal-organic framework material, preparation method and application thereof
  • A terbium-based metal-organic framework material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 0.012mg of terphenyltetracarboxylic acid, 0.027mg of terbium nitrate, 4mL of N,N-dimethylformamide, 2mL of deionized water, and 1mL of 3.6M nitric acid, and add them into a stainless steel reaction kettle with Teflon lining , react at a constant temperature at 100°C for 72h, and cool down to room temperature at a constant rate of 2-3°C / hour to obtain a colorless and transparent strip-shaped terbium-based metal organic framework crystal material.

[0026] With 0.1mmoL of KX (X=Ac - , H 2 PO 4 - , Cl - , CO 3 2- , Br - , I - , SCN - , SO 4 2- , NO 3 - , Cr 2 o 7 2-) were added to containers containing 10 mL of DMF solution, ultrasonicated for 10 min, and then 10 mg of the crystals obtained in Example 1 were respectively put into the containers, and vibrated for 20 min to obtain a mixed suspension.

[0027] The suspension liquid obtained above is moved into a cuvette, with 340nm as the excitation wavelength, and the delay time is set as 0.2ms, and the...

Embodiment 2

[0029] Weigh 0.012mg of terphenyltetracarboxylic acid, 0.027mg of terbium nitrate, 6mL of N,N-dimethylformamide, 2mL of deionized water, 1mL of 3.6M nitric acid, and add them into a stainless steel reaction kettle with Teflon lining , react at a constant temperature at 100°C for 72h, and cool down to room temperature at a constant rate of 2-3°C / hour to obtain a colorless and transparent strip-shaped terbium-based metal organic framework crystal material. In order to verify the identification of materials to dichromate in the mixed ion solution system, the mixed ion solution is divided into the following four groups: 1: indicates that it contains the following anions: Ac - , H 2 PO 4 - , Cl - , CO 3 2- ;2: Indicates that it contains the following anions: Br - , I - , SCN - , SO 4 2- , NO 3 - ;3: Indicates that it contains the following anions: Ac - , H 2 PO 4 - , Cl - , CO 3 2- , Cr 2 o 7 2- ;4: Indicates that it contains the following anions: Br - , I -...

Embodiment 3

[0032] Weigh 0.024mg of terphenyltetracarboxylic acid, 0.054mg of terbium nitrate, 6mL of N,N-dimethylformamide, 2mL of deionized water, 1.5mL of 3.6M nitric acid, and put them into a stainless steel reaction kettle with Teflon lining , react at a constant temperature of 100° C. for 72 hours, and cool down to room temperature at a constant rate of 2-3° C. / hour to obtain a colorless and transparent strip-shaped terbium-based metal organic framework crystal material.

[0033] In order to obtain the fluorescence quenching of the material under different concentrations of dichromate ions, weigh 0.1, 0.01, 0.001, 0.0001mmoL of K 2 Cr 2 o 7 were added to the container containing 10mL of DMF solution (concentration of 10 -2 、10 -3 、10 -4 、10 -5 mol / L), sonicated for 10 minutes, and then 10 mg of colorless transparent crystals were added to the container respectively, and oscillated for 20 minutes to obtain a suspension.

[0034] Move the suspension obtained above into a cuvette...

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Abstract

The invention belongs to the field of fluorescence detection materials, and particularly relates to a preparation method of a rare earth terbium-based metal organic framework material and study on the performance of selectively recognizing heavy chromate ions in water. By selecting rare earth terbium emitting green light as metal central ions and selecting p-terphenyl-3,3'',5,5''-tetramethyl acid as organic sensitized ligands, a rare earth porous metal organic framework compound is synthesized under the hydrothermal condition. The compound causes the most obvious fluorescence quenching phenomenon to Cr2O72- anions in different anion solutions, and thus the compound can serve as a novel fluorescence probe for detecting Cr2O72- anions.

Description

technical field [0001] The invention belongs to the field of fluorescence detection materials, and relates to a preparation method of a metal-organic framework material constructed with terbium, a rare earth metal, as a metal center and terphenyltetracarboxylic acid as a ligand, and the selective recognition of dichromate by the compound. Background technique [0002] With the progress of society and the development of industry, a large amount of toxic and harmful industrial waste is discharged from factories into the environment. Dichromate is widely used in industries such as corrosion inhibitors, metal passivators, and bactericidal preservatives; however, the harm of dichromate to the environment and the human body cannot be ignored, and dichromate is a sensitizer source, is also a first-class carcinogen, and is more likely to cause inherited genetic defects. Experiments have proved that dichromic acid in water with a content exceeding 10ppm can kill aquatic organisms an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F5/00C07C51/41C07C63/331C08G83/00C09K11/06G01N21/64
CPCC07B2200/13C07C51/418C07C63/331C07F5/003C08G83/008C09K11/06C09K2211/182G01N21/6428
Inventor 赵君王超李东升吴亚盘董文文
Owner CHINA THREE GORGES UNIV
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