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A fluorescent sensor for detecting zinc ions and its preparation method

A fluorescent sensor and zinc ion technology, applied in the field of sensing, to achieve the effects of high yield, strong anti-interference ability, and low detection limit

Active Publication Date: 2019-06-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] No modified nanosilica-based fluorescent chemical sensors for zinc ions

Method used

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  • A fluorescent sensor for detecting zinc ions and its preparation method
  • A fluorescent sensor for detecting zinc ions and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation method for the fluorescent sensor of detecting zinc ion, concrete steps are as follows:

[0026] (1) Put nano-silica (the particle size of nano-silica is 10nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silicon dioxide is 10:1; then add 3-chloropropyl trimethyl Oxysilane, wherein the liquid-solid ratio of 3-chloropropyltrimethoxysilane to silicon dioxide mL:mg is 1:1, the product A obtained by reflux reaction at a temperature of 70°C for 16h, labeled as CPTMS-SiO 2 ;

[0027] (2) The product A (CPTMS-SiO 2 ) into acetonitrile, where acetonitrile and CPTMS-SiO 2 The liquid-solid ratio mL:mg is 10:1; add indole-3-acetaldehyde, wherein 2-indole-3-acetaldehyde and product A (CPTMS-SiO 2 ) with a mass ratio of 2:1, the product B obtained by reflux reaction for 16 hours at a temperature of 70°C under the condition of nitrogen protection, labeled as IA-SiO 2 ;

[0028] (3) The product B (IA-SiO 2 ) into methanol, wh...

Embodiment 2

[0033] Embodiment 2: a kind of preparation method for the fluorescent sensor of detecting zinc ion, concrete steps are as follows:

[0034](1) Put nano-silica (the particle size of nano-silica is 12nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silicon dioxide is 15:1; then add 3-chloropropyl trimethyl Oxysilane, wherein the liquid-solid ratio of 3-chloropropyltrimethoxysilane to silicon dioxide mL:mg is 2:1, and the product A obtained by reflux reaction at a temperature of 80°C for 18 hours is labeled as CPTMS-SiO 2 ;

[0035] (2) The product A (CPTMS-SiO 2 ) into acetonitrile, where acetonitrile and CPTMS-SiO 2 The liquid-solid ratio mL:mg is 15:1; add indole-3-acetaldehyde, wherein 2-indole-3-acetaldehyde and product A (CPTMS-SiO 2 ) with a mass ratio of 3:1, the product B obtained by reflux reaction for 18 hours at a temperature of 65°C under the condition of nitrogen protection, marked as IA-SiO 2 ;

[0036] (3) The product B (IA-SiO 2 ) into met...

Embodiment 3

[0040] Embodiment 3: A kind of preparation method of the fluorescent sensor that is used to detect zinc ion, concrete steps are as follows:

[0041] (1) Put nano-silica (the particle size of nano-silica is 16nm) into ethanol, where the liquid-solid ratio mL:mg of ethanol to silicon dioxide is 20:1; then add 3-chloropropyl trimethyl Oxysilane, wherein the liquid-solid ratio of 3-chloropropyltrimethoxysilane to silicon dioxide mL:mg is 3:1, and the product A obtained by reflux reaction at a temperature of 85°C for 22 hours is labeled as CPTMS-SiO 2 ;

[0042] (2) The product A (CPTMS-SiO 2 ) into acetonitrile, where acetonitrile and CPTMS-SiO 2 The liquid-solid ratio mL:mg is 18:1; add indole-3-acetaldehyde, wherein 2-indole-3-acetaldehyde and product A (CPTMS-SiO 2 ) with a mass ratio of 3:1, the product B obtained by reflux reaction for 22 hours at a temperature of 60°C under the condition of nitrogen protection, labeled as IA-SiO 2 ;

[0043] (3) The product B (IA-SiO 2...

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Abstract

The invention relates to a fluorescence sensor for detecting zinc ions and a preparation method thereof, and belongs to the technical field of fluorescence chemical sensors with nano structures. The preparation method comprises the following steps: putting nano silicon dioxide in ethanol, then adding 3-chloropropyltrimethoxysilane and performing refluxing reaction to obtain a product A; putting the product A in acetonitrile, adding indole-3-acetaldehyde and performing refluxing reaction under nitrogen protection to obtain a product B; putting the product B in methanol, then adding sodium hydroxide and 2-hydroxyacetophenone, and performing refluxing reaction to obtain a product C; putting the product C in methanol, then adding sodium hydroxide and a hydrogen peroxide solution, reacting under an ice bath and performing centrifugal separation to obtain a target product. The fluorescence sensor prepared by the preparation method provided by the invention has good selectivity for the zinc ions and has the advantages of being low in detection limit and high in response speed.

Description

technical field [0001] The invention relates to a fluorescent sensor for detecting zinc ions and a preparation method, belonging to the field of sensor technology. Background technique [0002] Zinc is one of the main life active elements, which regulates the immune function of the human body and plays a very important role in the metabolism of the human body. Human life activities are inseparable from zinc, but too much zinc has a huge impact on human life activities. The main source of zinc pollution is the wastewater discharged from electroplating, metallurgy, pigment and chemical industries. Therefore, the analysis and detection of zinc ions is particularly important. The detection methods of zinc mainly include atomic absorption spectrometry, inductively coupled plasma atomic emission spectrometry, fluorescence spectrometry and so on. However, these methods have disadvantages such as cumbersome pretreatment process, long analysis time, high cost of instruments and me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/6428
Inventor 张利波张耕玮王仕兴付立康彭金辉
Owner KUNMING UNIV OF SCI & TECH
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