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Ag-MOFs metal organic framework material, synthesis method thereof and application thereof in ion identification

A metal-organic framework, anion technology, applied in analytical materials, luminescent materials, material excitation analysis, etc., can solve problems such as instability of MOFs, and achieve the effects of easy control of the reaction, mild synthesis conditions, and simple reaction conditions.

Active Publication Date: 2019-01-18
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the detection of Cr 2 o 7 2- The luminescent MOFs sensors are rarely reported, because these sensors are difficult to detect Cr 2 o 7 2- respond
At the same time, many luminescent MOFs are unstable and thus can only detect ions in non-aqueous solvents.

Method used

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  • Ag-MOFs metal organic framework material, synthesis method thereof and application thereof in ion identification
  • Ag-MOFs metal organic framework material, synthesis method thereof and application thereof in ion identification
  • Ag-MOFs metal organic framework material, synthesis method thereof and application thereof in ion identification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Take 0.15mmol of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine, 0.05mmol of silver nitrate, 6ml of high-purity water, and 6ml of acetonitrile; In a lined stainless steel reaction kettle, add a dilute nitric acid solution with a concentration of 0.5mM dropwise, adjust the pH value of the reaction system to 5, and conduct a constant temperature solvothermal reaction at 120°C for 80 hours to obtain yellow blocky crystals, that is, 4-(2,4,6 -Carboxyphenyl)-2,2':6',2"-terpyridine Ag metal organic framework material.

[0043] Add 5 mg of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine Ag metal-organic framework to 10 mL of M(NO 3 ) x In aqueous solution (M=Al 3+ , Fe 2+ , Na + , K + ,Zn 2+ , Fe 3+ ,Cd 2+ ,Pb 2+ ,Cu 2+ ,Mg 2+ ,Mn 2+ ,Co 2+ ,In 3+ , Ni 2+ ,Hg 2+ ), ultrasonically oscillate at room temperature for 30 minutes, take it out and put it into a 4ml cuvette, and test the fluorescence intensity on a fluorescence photometer. Such as Figure 4 As shown, ...

Embodiment 2

[0045] Take 0.15mmol of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine, 0.05mmol of silver nitrate, 6ml of high-purity water, and 6ml of acetonitrile; In a lined stainless steel reaction kettle, add a dilute nitric acid solution with a concentration of 0.5mM dropwise, adjust the pH value of the reaction system to 5, and react at a constant temperature of 120°C for 80h to obtain yellow blocky crystals, that is, 4-(2,4,6-carboxy Phenyl)-2,2':6',2"-terpyridine Ag metal-organic framework material.

[0046] Add 5 mg of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine Ag metal-organic framework material to 10 mL containing different anions (Cl - , SO 4 2- ,SCN - , SO 3 2- ,NO 3 - , I - ,ClO 4 - ,CO 3 2- ,Br - , F - , Ac - ,H 2 PO 4 - ,MnO 4 2- ,CrO 4 2- ,Cr 2 o 7 2- ) aqueous solution, ultrasonically oscillate at room temperature for 30 minutes, take it out and put it into a 4ml cuvette, and test the fluorescence intensity on a fluorescence photometer. Such a...

Embodiment 3

[0048] Take 0.15mmol of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine, 0.05mmol of silver nitrate, 6ml of high-purity water, and 6ml of acetonitrile; In a lined stainless steel reaction kettle, add a dilute nitric acid solution with a concentration of 0.5mM dropwise, adjust the pH value of the reaction system to 5, and react at a constant temperature of 120°C for 80h to obtain yellow blocky crystals, that is, 4-(2,4,6-carboxy Phenyl)-2,2':6',2"-terpyridine Ag metal-organic framework material.

[0049] Add 5 mg of 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine Ag metal-organic framework to 10 mL of Fe 3+ In the aqueous solution, take it out after ultrasonic vibration at room temperature for 30 minutes, put it into a 4ml four-sided transparent cuvette, and measure the fluorescence intensity on a fluorescence photometer. Such as Figure 6 , 8 As shown, it is obtained that the material has different concentrations of Fe 3+ Fluorescence quenching and fluorescence emission.

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PUM

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Abstract

The invention discloses an Ag-MOFs metal organic framework material, a synthesis method thereof and application thereof in ion identification. A chemical molecular formula of the metal organic framework material is {[Ag(H2L)]}n, and L is an organic ligand 4-(2,4,6-carboxyl phenyl)-2,2':6',2'- terpyridyl. A proton is removed from one carboxyl, and adjacent silver ions are bridged to form a wave-form 1D chain-shaped structure. A 1D ladder-shaped chain is connected with other 1D ladder-shaped chains through hydrogen bonds, so that a 2D layered structure is further expanded. The material is simpleto prepare, is novel in structure, and is stable in an aqueous solution, and trivalent iron ions and heavy chromium acid radical ions can be quickly detected.

Description

technical field [0001] The present invention specifically relates to a metal organic framework material formed with 4-(2,4,6-carboxyphenyl)-2,2':6',2"-terpyridine as an organic ligand and metallic silver as a metal center , and by detecting the fluorescence intensity of the compound in an aqueous solution system containing different ions at room temperature, the ferric ion and the dichromate ion can be quickly identified. Background technique [0002] Iron ions (Fe 3+ ) is one of the important trace elements in biological systems. Iron deficiency or excess can be harmful to biological systems. Fe 3+ Ions affect electron transfer and oxygen metabolism processes in DNA and RNA synthesis. At the same time, Fe 3+ It is also an industrial pollutant. Dichromate ion (Cr 2 o 7 2- ) is a pollutant produced by industries such as chrome plating, leather tanning, pigment manufacturing, and wood preservation, and is listed by the United States as a Class "A" human carcinogen. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G83/00G01N21/64
CPCC08G83/008C09K11/06C09K2211/188G01N21/643G01N2021/6432
Inventor 李东升魏君华易经纬董文文张其春卜贤辉
Owner CHINA THREE GORGES UNIV
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