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Ratio type fluorescent carbon dot for Ag<+> and GSH detection and preparation method thereof

A fluorescent carbon dot, ratio-based technology, applied in chemical instruments and methods, fluorescence/phosphorescence, measuring devices, etc., can solve the problems of limited application, single emission peak, etc., and achieve high sensitivity, good solubility and dispersibility, and selectivity Good results

Active Publication Date: 2019-03-19
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the currently synthesized carbon dots emit blue-green fluorescence, which limits their applications in biomedical and optoelectronic devices
A few literatures have reported the application of long-wave emission of carbon dots, but these long-wave fluorescent carbon dots only have a single emission peak and the intensity change of a single emission peak, and are easily affected by other concentrations and external environmental conditions.

Method used

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  • Ratio type fluorescent carbon dot for Ag&lt;+&gt; and GSH detection and preparation method thereof
  • Ratio type fluorescent carbon dot for Ag&lt;+&gt; and GSH detection and preparation method thereof
  • Ratio type fluorescent carbon dot for Ag&lt;+&gt; and GSH detection and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] One for the detection of Ag + The preparation method of the ratio type fluorescent carbon point of GSH comprises the following steps:

[0027] 1) Weigh 0.003g of neutral red and dissolve it in 20mL of secondary water, then add 400 μL of triethylamine to the solution, and ultrasonically obtain a uniform mixed solution. The mass ratio of neutral red, secondary water and triethylamine is 1.5 :10000:146;

[0028] 2) Transfer the above solution to a 50mL hydrothermal reaction kettle, react at 220°C for 8h, wait for the reaction to stop and let it cool down to room temperature, centrifuge to remove insoluble matter, take the supernatant, and pass it through a 500-1000Da dialysis bag, Dialyze in a glass container for at least three days to obtain a pure aqueous solution of carbon dots;

[0029] 3) The carbon dots emitting orange-red fluorescence were obtained by freeze-drying the above aqueous solution of carbon dots. Taking rhodamine B as a reference, its relative quantum ...

Embodiment 2

[0031] One for the detection of Ag + The preparation method of the ratio type fluorescent carbon point of GSH comprises the following steps:

[0032] 1) Weigh 0.0059g of neutral red and dissolve it in 20mL of secondary water, then add 300 μL of triethylamine to the solution, and ultrasonically obtain a uniformly mixed solution. The mass ratio of neutral red, secondary water and triethylamine is 3 :10000:110;

[0033] 2) Transfer the above solution to a 50mL hydrothermal reaction kettle, react at 200°C for 8h, wait for the reaction to stop and let it cool down to room temperature, centrifuge to remove insoluble matter, take the supernatant, pass through a 500-1000Da dialysis bag, Dialyze in a glass container for at least three days to obtain a pure aqueous solution of carbon dots;

[0034] 3) The carbon dots emitting orange-red fluorescence were obtained by freeze-drying the above aqueous solution of carbon dots. Taking Rhodamine B as a reference, its relative quantum yield ...

Embodiment 3

[0036] One for the detection of Ag + The preparation method of the ratio type fluorescent carbon point of GSH comprises the following steps:

[0037] 1) Weigh 0.009g of neutral red and dissolve it in 20mL of secondary water, then add 200 μL of triethylamine to the solution, and ultrasonically obtain a uniform mixed solution. The mass ratio of neutral red, secondary water and triethylamine is 4.5 :10000:73;

[0038] 2) Transfer the above solution to a 50mL hydrothermal reaction kettle, react at 200°C for 10h, wait for the reaction to stop and let it cool down to room temperature, centrifuge to remove insoluble matter, take the supernatant, and pass it through a dialysis bag of 500-1000Da, Dialyze in a glass container for at least three days to obtain a pure aqueous solution of carbon dots;

[0039] 3) The carbon dots emitting orange-red fluorescence were obtained by freeze-drying the above aqueous solution of carbon dots. Taking Rhodamine B as a reference, its relative quant...

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Abstract

The invention provides a ratio type fluorescent carbon dot for Ag<+> and GSH detection and a preparation method thereof. The preparation method of the fluorescent carbon dot includes (1), weighing a certain mass of neutral red, dissolving the neutral red in secondary water, adding a small quantity of triethylamine in the solution, performing ultrasonic treatment to obtain uniformly mixed solution,wherein the mass ratio of neutral red, secondary water and triethylamine is (1-5):10000:(50-150); (2), transferring the mixed solution into a hydrothermal reactor, reacting for 8-10 hours at the temperature of 200-220 DEG C, standing after finishing the reaction, cooling to the room temperature, centrifuging to remove undissolved substance and extracting supernate, subjecting the supernate to dialysis through a 500-1000 Da dialysis bag in a glass container for at least three days, so as to obtain purified carbon dot aqueous solution; (3), freezing to dry the carbon dot aqueous solution to obtain carbon dot with orange-red fluorescence emission. The ratio type fluorescent carbon dot prepared by the method has single identification effect to Ag<+> and GSH, and its fluorescence color can bein reversible conversion between green and orange red; when used for Ag<+> and GSH detection, the carbon dot has good selectivity and high flexibility.

Description

technical field [0001] The invention relates to fluorescent carbon dots, specifically belonging to a method for detecting Ag + Ratio-type fluorescent carbon dots with GSH and its preparation method and application. Background technique [0002] Heavy metal particle pollution widely exists in water, food, and soil, and is a serious environmental problem all over the world. Silver ions and their compounds are widely used in electrical related industries, photographic camera industry, and pharmaceutical industry, and are eventually released into the ecosystem intentionally or unintentionally. Therefore, related technologies that rely on silver have a certain degree of potential harm to the environment. In recent years, there have been related reports pointing out the bioaccumulation and potential toxicity of silver ions to invertebrates, phytoplankton, algal benign bacteria, amphibians and fish. Therefore, rapid and sensitive detection of silver ions is of great significance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/65G01N21/64
CPCC09K11/06C09K11/65G01N21/6428G01N21/643
Inventor 焦媛孟雅婷高艺芳路雯婧双少敏董川
Owner SHANXI UNIV
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