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Preparation method of magnetic nano fluorescent probe recognizing Fe (III) specifically

A magnetic nanometer and fluorescent probe technology, applied in the magnetism of organic materials/organic magnetic materials, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as secondary pollution and difficulty in probe recovery, Achieve low cost, solve recycling difficulties, and be easy to achieve

Active Publication Date: 2019-03-08
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similar probes also include a rhodamine hydrazide derivative compound disclosed in CN106146526A, but such probes generally have the problems of difficult recovery and secondary pollution

Method used

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  • Preparation method of magnetic nano fluorescent probe recognizing Fe (III) specifically
  • Preparation method of magnetic nano fluorescent probe recognizing Fe (III) specifically
  • Preparation method of magnetic nano fluorescent probe recognizing Fe (III) specifically

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Fe coated with silica 3 o 4 Nanoparticles were dispersed in 100mL water-alcohol mixed solvent (V 乙醇 : V 水 =4:1), to obtain a concentration of dispersion A of 2.5g / L. Then add 1mL 3-aminopropyltriethoxysilane and 2.5mL ammonia water, stir and react at room temperature for 12h, then centrifuge, and the obtained product is alternately washed with water and ethanol for 3 times, which is the Fe surface-modified amino group. 3 o 4 Nanoparticles.

[0025] Fe with surface-modified amino groups 3 o 4 The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion B with a concentration of 2.5 g / L. Then add 2.0g glyoxal (40%, volume fraction, the same below) and 2 drops of glacial acetic acid, stir and reflux for 10h and then centrifuge. 3 o 4 Nanoparticles.

[0026] Fe with surface modified aldehyde groups 3 o 4 The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion C with a concentration of 2.5 g / L. Then add 0.75g of rhodamine hydra...

Embodiment 2

[0029] Fe coated with silica 3 o 4 Nanoparticles were dispersed in 100mL water-alcohol mixed solvent (V 乙醇 : V 水 =4:1), to obtain a concentration of dispersion A of 5g / L. Then add 2mL 3-aminopropyltriethoxysilane and 5mL ammonia water, stir and react at room temperature for 12h, then centrifuge, and the obtained product is alternately washed with water and ethanol for 3 times, which is the Fe surface-modified amino group. 3 o 4 Nanoparticles.

[0030] Fe with surface-modified amino groups 3 o 4 The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion B with a concentration of 5 g / L. Then add 6g glyoxal (40%) and 2 drops of glacial acetic acid, stir and reflux for 10h and then centrifuge. 3 o 4 Nanoparticles.

[0031] Fe with surface modified aldehyde groups 3 o 4The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion C with a concentration of 5 g / L. Add 3 g of rhodamine hydrazide and 2 drops of glacial acetic acid, stir and r...

Embodiment 3

[0034] Fe coated with silica 3 o 4 Nanoparticles were dispersed in 100mL water-alcohol mixed solvent (V 乙醇 : V 水 =4:1), to obtain a concentration of dispersion A of 1g / L. Then add 0.5mL 3-aminopropyltriethoxysilane and 0.5mL ammonia water, stir and react at room temperature for 12 hours, then centrifuge, and the obtained product is washed alternately with water and ethanol for 3 times, which is the Fe surface-modified amino group. 3 o 4 Nanoparticles.

[0035] Fe with surface-modified amino groups 3 o 4 The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion B with a concentration of 1 g / L. Then add 0.4g glyoxal (40%) and 2 drops of glacial acetic acid, stir and reflux for 10h and then centrifuge. The resulting product is washed 3 times with ethanol, which is the surface modified Fe 3 o 4 Nanoparticles.

[0036] Fe with surface modified aldehyde groups 3 o 4 The nanoparticles were dispersed in 40 mL of ethanol to obtain a dispersion C with a con...

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Abstract

The invention relates to a preparation method of a magnetic nano fluorescent probe recognizing Fe (III) specifically and primarily solves the problems that the conventional metal ion probe is hard torecover and separate, easy to lead to pollution and the like. In the preparation process, the magnetic nano fluorescent probe recognizing Fe3<+> specifically is finally obtained by modifying Fe3O4 nanoparticles coated by 3-aminopropyltriethoxysilane, glyoxal and rhodaminizide successively, and can be recovered conveniently and rapidly by magnetic separation.

Description

technical field [0001] The invention relates to the technical field of fluorescent probes and metal ion detection, in particular to a method for specifically recognizing Fe 3+ Magnetic nano fluorescent probe and its preparation method. Background technique [0002] The detection and treatment of heavy metal ions has been one of the most serious problems in the field of environmental protection in the past few decades. Different types of metal ions will have different impacts on the environment and organisms. The accumulation of high concentrations of heavy metal ions and transition element ions in organisms will affect the normal function of cells, and generally the greater the harm as the accumulation concentration increases , and heavy metal pollution in natural water bodies will also pose a potential threat to human health. [0003] Fe 3+ (or Fe(III)) is one of the most basic elements in biological systems, and it is of great significance to maintain the normal operati...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/06G01N21/64H01F1/42B82Y30/00B82Y40/00
CPCH01F1/42G01N21/643C09K11/025C09K11/06B82Y30/00B82Y40/00C09K2211/1088C09K2211/1007
Inventor 吴江渝汪苏平陈玉婷曾小平郑华明郭庆中
Owner WUHAN INSTITUTE OF TECHNOLOGY
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