Preparation method and application of europium coordination polymer for visible detection on p-nitrophenol and iron ion

A technology of coordination polymers and p-nitrophenol, which is applied in measuring devices, chemical recovery, instruments, etc., to achieve high selectivity, fast and accurate detection, and good application prospects

Inactive Publication Date: 2016-08-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bifunctional europium coordination polymers that can realize th...

Method used

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  • Preparation method and application of europium coordination polymer for visible detection on p-nitrophenol and iron ion
  • Preparation method and application of europium coordination polymer for visible detection on p-nitrophenol and iron ion
  • Preparation method and application of europium coordination polymer for visible detection on p-nitrophenol and iron ion

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 0.174g of sodium dodecylbenzenesulfonate and add it to 12mL of deionized water, then add 0.223g of europium nitrate hexahydrate, 0.254g of 1,2,4,5-pyromellitic acid and 0.094g of 4 - Aminopyridine, stirred at room temperature for 30 minutes, crystallized at 160° C. for 48 hours, naturally cooled to room temperature, filtered, washed with water, and dried to obtain a europium coordination polymer. Select a coordination polymer single crystal with a suitable size, use the German Bruker ApexCCD single crystal X-ray diffractometer, use graphite as the monochromator, and use MoKα Target, the test temperature is (293±2)K, in the range of 2.30°figure 1 .

[0030] The prepared europium coordination polymer is dispersed in ethanol solution, and the test fluorescence intensity is I 0 , add different amounts of p-nitrophenol (4-NP) successively, its fluorescence intensity is 1, can obtain the working curve of detection. like image 3 and Figure 4 As shown, it can be se...

Embodiment 2

[0032] Weigh 0.182g of cetyltrimethylammonium bromide into 12mL of deionized water, add 0.223g of europium nitrate hexahydrate, 0.254g of 1,2,4,5-pyromellitic acid and 0.188g 4-aminopyridine, stirred at room temperature for 30min, crystallized at 160°C for 48h, naturally cooled to room temperature, filtered, washed with water, and dried to obtain a europium coordination polymer, such as figure 2 As shown, the peak position of the experimental sample and the simulated X-ray powder diffraction are basically the same. The prepared europium coordination polymer is dispersed in ethanol solution, and the test fluorescence intensity is I 0 , followed by adding different amounts of FeCl 3 solution, its fluorescence intensity is I, and the working curve of detection can be obtained; the test results show that with the continuous increase of the amount of substance, its fluorescence intensity gradually decreases, see Image 6 and 7 shown. Add and drop other interfering metal ions o...

Embodiment 3

[0034] 0.120g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) was dissolved in 12mL of deionized water, 0.446g of europium nitrate hexahydrate, 0.254g of pyromellitic acid and 0.188g of 4-aminopyridine was prepared into a mixed solution, stirred at room temperature for 30 minutes, crystallized at 160°C for 48 hours, naturally cooled to room temperature, filtered, washed with water, and dried to obtain a europium coordination polymer. Disperse the prepared europium coordination polymer in ethanol solution, stir ultrasonically for 15 min, and slowly filter with solvent filter and chromatographic filter paper, so that the coordination polymer is evenly adsorbed on the chromatographic filter paper, and wash repeatedly with deionized water until washed. There is no fluorescence in the liquid; put the prepared test paper in a vacuum drying oven at 50°C to dry, then cut it into 1.5cm×1.5cm size and put it in a plastic bag for future use. Add p-n...

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Abstract

The invention provides a preparation method and application of a europium coordination polymer for visible detection on p-nitrophenol and iron ions, and belongs to the technical field of novel materials. The preparation method comprises the following step: under a hydrothermal or solvothermal condition, performing molecular self-assembly on metal europium ions, organic ligand and a structure-directing agent with additives, thereby synthesizing the europium coordination polymer. The europium coordination polymer is excellent in fluorescent sensing property for the p-nitrophenol and the iron ions; a piece of detection test paper can be prepared from the synthesized europium coordination polymer and a carrier in a compounding manner, and rapid, simple, convenient and visible detection on the p-nitrophenol and the iron ions can be achieved. Compared with the prior art, the prepared europium coordination polymer and the test paper can achieve selective detection on the p-nitrophenol and the iron ions, have the characteristics of low preparation cost and rapid and accurate detection, and have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a europium coordination polymer which can be used for visual detection of p-nitrophenol and iron ions and an application thereof. Background technique [0002] p-Nitrophenol (4-NP) is an important intermediate in the synthesis of pesticides, medicines, and dyes, but it is seriously harmful to the environment and will cause water and air pollution. Contact with p-nitrophenol can cause dermatitis, headache, dizziness, cough, nausea, and vomiting, and severe cases can lead to gastrointestinal perforation, pulmonary edema, renal failure and even death. On the other hand, iron is an essential element for many organisms including humans, and it plays an important role in many biological processes such as oxygen storage, oxygen transport, and electron transfer. But iron ions (Fe 3+ ) Excessive presence can damage cell membranes, proteins and DNA, and even lead to cel...

Claims

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Application Information

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IPC IPC(8): C08G83/00G01N21/64
CPCY02P20/582C08G83/008G01N21/6428G01N2021/6432
Inventor 叶俊伟宁桂玲保格乐孙圆张思琦林源
Owner DALIAN UNIV OF TECH
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