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Copper ion fluorescent detecting probe and method for making same and purpose

A fluorescent probe and copper ion technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of low sensitivity, high cost, and low sensitivity of trace element determination

Inactive Publication Date: 2008-09-10
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The methods commonly used to determine the content of trace copper are: atomic absorption spectrometry, which belongs to the conventional elemental analysis method, but has low sensitivity and complicated operation for the determination of trace elements.
Zeeman effect graphite furnace atomic absorption spectrometry is an accurate and reliable method, but it is also complicated to operate and expensive, making it difficult to apply on a large scale
In addition, there is a method of colorimetric determination using a complexing agent and copper ion to form a colored complex, but its sensitivity is low and the reproducibility is poor, so it is rarely used now
Fluorescent molecular probe technology is applied to the detection of transition metals and heavy metal ions, which can realize in-situ detection. Because ordinary fluorescent molecular probes have poor selectivity to metal ions in aqueous solution, many probe molecules can only be detected in organic solvents. exhibit recognition performance

Method used

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  • Copper ion fluorescent detecting probe and method for making same and purpose
  • Copper ion fluorescent detecting probe and method for making same and purpose
  • Copper ion fluorescent detecting probe and method for making same and purpose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Soak the tetrafluoroethylene lining with cadmium acid for more than 2 hours, then rinse it with tap water, ultrasonically clean with ultrapure water for 20 minutes, and place it in an oven at 60°C for drying.

[0023] 2) Prepare 250ml of polyethyleneimine PEI (molecular weight: 70000) solution with a concentration of 0.1mM (calculated as aziridine monomer), take 10ml, filter through a 0.45μm microporous filter membrane, then add 10ml of ethanol and mix well, set Put it into a 30ml tetrafluoroethylene lining, then seal it with a stainless steel jacket, and react at 120°C for 12h.

[0024] 3) Fix the reaction concentration and time, and sequentially change the reaction temperature: 100°C, 120°C, 130°C, 140°C, 150°C, 160°C, 180°C, and react for 12 hours.

[0025]4) Fix the reaction temperature and concentration, and change the reaction time in sequence: 2h, 4h, 6h, 10h, 12h, 14h, 18h, 24h.

[0026] 5) Fix the reaction temperature, concentration and time, add H in sequence 2...

Embodiment 2

[0029] Replace PEI (70000) with PEI (600), and the others are the same as in Example 1. During the reaction, the color of the solution changed from colorless to light yellow, and the fluorescent probe product was obtained after collection. The fluorescence intensity of PEI (600) decreased under the same concentration condition.

Embodiment 3

[0031] Replace PEI (70000) with PEI (10000), and the others are the same as in Example 1.

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Abstract

A copper ion fluorescent probe and a preparation method and the use thereof relate to a fluorescence molecule probe, in particular to a copper ion fluorescence molecule probe and the preparation method and the application of the probe in the identification and detection of heavy metal. A copper ion fluorescence molecule probe with better effect which can test the heavy metallic copper ions in aqueous solution and the preparation method and the application are provided. Polyethyleneimine is allocated to be polyethyleneimine solution; the polyethyleneimine solution is taken out, filtered and poured into the lining of polytetrafluoroethylene which is sealed by a stainless steel cover; a solvent is distilled after reactions and the yellow viscous liquid-like copper ion fluorescent probe is gained. The copper ion fluorescent probe can be applied to the detection of the heavy metallic copper ions, in particular to the detection of the copper ions in biological tissues and environmental wastewater.

Description

Technical field [0001] The invention relates to a fluorescent molecular probe, in particular to a copper ion fluorescent molecular probe and a preparation method thereof, and the application of the fluorescent molecular probe in the identification and detection of heavy metal ions. Background technique [0002] Hyperbranched polymers are a kind of macromolecules with three-dimensional spatial structure and highly branched segments. Due to their unique physical and chemical properties, such polymers are used in the fields of functional materials such as drug carriers, gene carriers and biodegradable materials, sensors, etc. It has broad application prospects and has become a hot spot in polymer science research in the past ten years. Combining the fluorescent properties with the hyperbranched characteristics of hyperbranched polymers, it is expected to prepare hyperbranched fluorescent functional polymer materials with excellent performance. There are two main current research met...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 翁建崔强张其清来琳婓刘晓清李思越
Owner XIAMEN UNIV
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