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Rare earth organic framework material for iron ion fluorescence detection and preparation method thereof

A rare-earth organic and framework material technology, applied in luminescent materials, fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of probe sensitivity, detector stability, etc., and achieve novel structure, avoid probe concentration, and simple process Effect

Active Publication Date: 2018-01-09
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron ions are very efficient fluorescence quenchers, and most of the iron ion fluorescent probes reported so far are of the fluorescence quenching type, but the sensitivity of such probes is easily affected by the concentration of the probe material, the microenvironment, the stability of the excitation light source, and The influence of factors such as detector stability

Method used

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  • Rare earth organic framework material for iron ion fluorescence detection and preparation method thereof
  • Rare earth organic framework material for iron ion fluorescence detection and preparation method thereof
  • Rare earth organic framework material for iron ion fluorescence detection and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add 0.1 mmol of europium nitrate and 0.1 mmol of 2-methoxyterephthalic acid into 10 mL of water, stir until uniformly mixed, and obtain a mixed suspension;

[0031] 2) Put the mixed suspension obtained in step 1) into a 20mL hydrothermal kettle, and react in a constant temperature oven at 170°C for 1 day. During the hydrothermal reaction, the methoxy functional group of the organic ligand reacts in situ to become a hydroxyl functional group. The linear diformic acid organic ligand of the hydroxyl functional group and the rare earth ion undergo a coordination reaction to obtain a suspension after the hydrothermal reaction;

[0032] 3) The suspension after the hydrothermal reaction obtained in step 2) is naturally cooled to room temperature, centrifuged, and washed 3 times with deionized water and absolute ethanol respectively to obtain a linear dicarboxylic acid organic ligand containing a hydroxyl functional group (L -OH) rare earth organic framework material Eu 2 (...

Embodiment 2

[0034] 1) Add 0.21 mmol of gadolinium nitrate and 0.10 mmol of 2,5-dimethoxyterephthalic acid into 10 mL of water, stir until uniformly mixed, and obtain a mixed suspension;

[0035] 2) Put the mixed suspension obtained in step 1) into a 20mL hydrothermal kettle, and react in a constant temperature oven at 150°C for 3 days. During the hydrothermal reaction, the methoxy functional group of the organic ligand reacts in situ to become a hydroxyl functional group. The linear diformic acid organic ligand of the hydroxyl functional group and the rare earth ion undergo a coordination reaction to obtain a suspension after the hydrothermal reaction;

[0036]3) The suspension obtained in step 2) after the hydrothermal reaction is naturally cooled to room temperature, centrifuged, and washed 5 times with deionized water and absolute ethanol respectively to obtain a linear dicarboxylic acid organic ligand containing a hydroxyl functional group (L -OH) rare earth organic framework material...

Embodiment 3

[0038] 1) Add 0.33mmol of terbium nitrate and 0.10mmol of 3-methoxy-[1,1'-biphenyl]-4,4'-dicarboxylic acid into 10mL of water, stir until evenly mixed to obtain a mixed suspension ;

[0039] 2) Put the mixed suspension obtained in step 1) into a 20mL hydrothermal kettle, and react in a constant temperature oven at 140°C for 4 days. During the hydrothermal reaction, the methoxy functional group of the organic ligand reacts in situ to become a hydroxyl functional group. The linear diformic acid organic ligand of the hydroxyl functional group and the rare earth ion undergo a coordination reaction to obtain a suspension after the hydrothermal reaction;

[0040] 3) The suspension after the hydrothermal reaction obtained in step 2) is naturally cooled to room temperature, centrifuged, and washed 6 times with deionized water and absolute ethanol respectively to obtain a linear dicarboxylic acid organic ligand containing a hydroxyl functional group (L -OH) rare earth organic framewor...

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Abstract

The invention discloses a rare earth organic framework material for iron ion fluorescence detection and a preparation method thereof. Methoxyl functional group-containing linear dicarboxylic acid (L-OCH3) is used as an organic raw material, a hydrothermal reaction is performed on the organic raw material and metal rare earth salt, and in the reaction process, an in-situ reaction is performed on methoxyl functional groups of an organic ligand to produce hydroxyl functional groups and the rare earth organic framework material is obtained. After adoption of the hydrothermal preparation method, the method is simple and the yield is high; the prepared rare earth organic framework material can be used as a fluorescent probe and interacts with iron ions, so that fluorescence of the organic ligandis quenched and new fluorescence generating a Ln2 (L-OH) 3-Fe<3+> compound is enhanced, and the intensity ratio between two peaks has a relatively good linear relationship with the concentration of the iron ions; the rare earth organic framework material can be applied to ratio detection of the iron ions.

Description

technical field [0001] The invention relates to a metal organic framework material, in particular to a rare earth organic framework material for iron ion fluorescence detection and a preparation method thereof, belonging to the technical field of organic materials. Background technique [0002] Iron is widely found in water, plants, soil and organisms, and plays a very important role in biochemical processes. The formation of hemoglobin in human blood depends on iron ions, which have the function of storing and transporting oxygen. Iron deficiency in the human body can cause anemia, while excess iron intake in the human body can also cause metabolic confusion and cause disease. The World Health Organization stipulates that the upper limit of the concentration of iron ions in drinking water is 0.3ppm, so it is very important to effectively and accurately detect iron ions. [0003] At present, the main detection methods for iron ions are atomic absorption spectrometry, spect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K11/06G01N21/64
Inventor 徐绘董颖莹徐时清
Owner CHINA JILIANG UNIV
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