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Fluorescein type ionic liquid, synthetic method thereof and application of fluorescein type ionic liquid in detection of mercury ions or methyl mercury ions

A technology of ionic liquid and fluorescein, which is applied in fluorescence/phosphorescence, chemical instruments and methods, compounds of group 5/15 elements of the periodic table, etc., can solve sensor fluorescence quenching, complex pretreatment, mercury ions and methyl Mercury ion detection time is long and other problems, to achieve the effect of obvious visual effect, easy to obtain raw materials, high quantum yield

Active Publication Date: 2022-03-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of long detection time and complex pretreatment of mercury ions and methylmercury ions in actual samples, the present invention synthesized an ionic liquid [Fluo][P 66614 ] 2 , when the sensor is complexed with mercury ions and methylmercury ions, the fluorescence of the sensor will be quenched, which provides the possibility for instant detection of mercury ions and methylmercury ions in actual samples

Method used

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  • Fluorescein type ionic liquid, synthetic method thereof and application of fluorescein type ionic liquid in detection of mercury ions or methyl mercury ions
  • Fluorescein type ionic liquid, synthetic method thereof and application of fluorescein type ionic liquid in detection of mercury ions or methyl mercury ions
  • Fluorescein type ionic liquid, synthetic method thereof and application of fluorescein type ionic liquid in detection of mercury ions or methyl mercury ions

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Effect test

Embodiment 1

[0045] A kind of synthetic of fluorescent ionic liquid, concrete synthetic method is as follows:

[0046] (1)[P 66614 ][Cl] dechlorination treatment:

[0047] Will [P 66614 The ethanol solution of ][Cl] is slowly added in the chromatographic column that strong basic anion exchange resin is housed, collects effluent [P 66614 ][OH] in ethanol.

[0048] (2) Fluorescent ionic liquid [Fluo][P 66614 ] 2 preparation of

[0049] Weigh 2mol fluorescein and 4mol [P 66614 ] [OH] ethanol solution in a 250ml round bottom flask, add 50ml of absolute ethanol, react in an oil bath at 60°C for 12h, and stir while heating. After removing the solvent of the reacted product solution with a rotary evaporator, heat it in an oil bath at 60° C., and pass nitrogen gas while heating (about 30 min), and finally obtain an orange-yellow viscous liquid. Store airtight at room temperature.

Embodiment 2

[0051] A fluorescence / colorimetric detection method for rapid detection of mercury ions in actual samples, the specific steps comprising:

[0052] (1) Detection of mercury ions by fluorescent / colorimetric probes:

[0053] Configuration [Fluo] [P 66614 ] 2 The concentration is 1×10 -3 The mol / L ethanol solution was used as the stock solution, and the stock solution was diluted 100 times before the fluorescence test. Take 200μl of [Fluo][P 66614 ] 2 In the quartz micro cuvette, then add different concentrations (1nmol, 3nmol, 5nmol, 7nmol, 10nmol, 15nmol, 20nmol, 25nmol, 30nmol, 35nmol, 40nmol) ethanol solution of mercury sulfate, collect the fluorescence emission spectrum of the solution ( figure 1 ). The excitation wavelength is 460nm, and both excitation and emission slit widths are 10nm. Record the fluorescence intensity of the highest peak. Quantitative detection of mercury ions was performed according to the fitted linear curve. Such as figure 2 As shown, the li...

Embodiment 3

[0061] A fluorescence / colorimetric detection method for rapidly detecting methylmercury ions, the specific steps comprising:

[0062] (1) Detection of methylmercury ions by fluorescent / colorimetric probes:

[0063] Configuration [Fluo] [P 66614 ] 2 The concentration is 1×10 -3 The mol / L ethanol solution was used as the stock solution, and the stock solution was diluted 100 times before the fluorescence test. Take 200μl of [Fluo][P 66614 ] 2 In the quartz micro cuvette, then add different concentrations (0, 1 μmol, 3 μmol, 5 μmol, 7 μmol, 10 μmol, 30 μmol, 50 μmol, 70 μmol) ethanol solution of methylmercury ion, collect the fluorescence emission spectrum of the solution ( Figure 6 ). The excitation wavelength is 460nm, and both excitation and emission slit widths are 10nm. Record the fluorescence intensity of the highest peak. Methmercury ions were quantitatively detected according to the fitted linear curve. Such as Figure 7 As shown, the linear correlation coeffic...

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Abstract

The invention discloses a fluorescein type ionic liquid, a synthesis method thereof and an application of the fluorescein type ionic liquid in mercury ion or methyl mercury ion detection, the chemical formula of the fluorescein type ionic liquid is [Fluo] [P66614] 2, and the structural formula is shown as a formula (I); the ionic liquid with green fluorescence emission is synthesized through a simple ion exchange method, the method is simple in synthesis step, and raw materials are simple and easy to obtain; the designed and synthesized [Fluo] [P66614] 2 fluorescent ionic liquid is high in quantum yield, good in thermal stability and small in environmental pollution; according to the method, the mercury ions and the methyl mercury ions in an actual sample can be qualitatively analyzed and quantitatively detected, and possibility is provided for rapid detection of the mercury ions and the methyl mercury ions in the actual sample;

Description

technical field [0001] The invention relates to a fluorescein-type ionic liquid and a synthesis method thereof, as well as an application in rapid fluorescence / colorimetric detection of mercury ions or methylmercury ions in actual samples. Background technique [0002] Mercury and its compounds are heavy metal ion pollutants that are highly toxic and have serious harm to the environment and human health. The toxicity of mercury has a great relationship with its existing state. Mercury mainly exists in three forms: metallic mercury, inorganic mercury, and organic mercury. Among them, Hg 2+ It is the main state of existence in water samples. Hg in water sample 2+ It is easy to change into more toxic methylmercury ions under the action of microorganisms or chemical reactions. It is easy to amplify through the food chain and accumulate in organisms. After entering the human body, it will be transported to the tissues of the whole body by blood cell tissues through the cell mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D311/82C07F9/54C09K11/06G01N21/64G01N21/78
CPCC07D311/82C07F9/5407C09K11/06G01N21/643G01N21/78C09K2211/1088G01N2021/6432
Inventor 车思莹尹琳琳佘远斌徐安妮
Owner ZHEJIANG UNIV OF TECH
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