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Ratio-type fluorescent probe based on carbon dot as well as preparation method and application thereof

A fluorescent probe and ratiometric technology, applied in the field of nano-fluorescent materials, can solve the problems of short lifetime, low fluorescence quantum yield, etc., and achieve good selectivity and sensitivity

Inactive Publication Date: 2015-06-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low fluorescence quantum yield and short lifetime of carbon dots limit its development

Method used

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  • Ratio-type fluorescent probe based on carbon dot as well as preparation method and application thereof
  • Ratio-type fluorescent probe based on carbon dot as well as preparation method and application thereof
  • Ratio-type fluorescent probe based on carbon dot as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] CNPs-BHHCT-Eu 3+ preparation of

[0025] Weigh 1 mg of BHHCT and 10 mg of CNPs, fully dissolve them in 20 mL of absolute ethanol, add 1 mL of triethylamine, stir at room temperature for 2 h, then add 0.5 mg of EuCl 3 ·6H 2 O, continue to stir for 30min and leave overnight. Triethylamine and ethanol were removed by rotary evaporation under vacuum, and the solid product was washed continuously with deionized water.

[0026] CNPs-BHHCT-Eu 3+ Characterization of properties

[0027] (1) CNPs, BHHCT and CNPs-BHHCT-Eu 3+ The fluorescence spectral characteristics of

[0028] figure 1 are CNPs and CNPs-BHHCT-Eu 3+ The fluorescence spectrum and UV absorption spectrum (1-CNP s The UV absorption spectrum of 2-CNPs-BHHCT-Eu 3+ UV absorption spectrum of 3-BHHCT, fluorescence spectrum of 4-CNPs, 5-CNPs-BHHCT-Eu 3+ fluorescence spectrum). It can be seen from the figure that CNPs have absorption at 280nm, and BHHCT has two absorption peaks at 260 and 345nm respectively. And...

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Abstract

The invention discloses a ratio-type fluorescent probe based on a carbon dot and a europium complex, a preparation method of the ratio-type fluorescent probe and an application method of the ratio-type fluorescent probe in a water sample detection technology. A hyperfluorescence rare earth complex and the carbon dot are taken as a double luminous center, a covalent binding manner is adopted for bonding two luminophors together, and ratio-type detection on Cu<2+> ions in a water sample is carried out by virtue of strength ratio of the hyperfluorescence rare earth complex to the carbon dot. The ratio-type fluorescent probe has good selectivity and sensitivity.

Description

technical field [0001] The invention relates to a nano fluorescent material, in particular to a carbon dot-based ratio fluorescent probe material and its preparation and application. Background technique [0002] As a new type of material, nanomaterials have attracted intense attention and research boom in recent years. Fluorescent nanomaterials have attracted much attention because of their advantages such as high fluorescence intensity and good photostability. In recent years, semiconductor quantum dots (semiconductor quantum dots) have attracted the attention of researchers due to their unique spectral characteristics, especially in nano-optical devices and biological fluorescent labeling (Document 1: Alivisatos A P Semiconductor clusters, nanocrystals , and quantum dots [J]. Science, 1996, 271(5251): 933-937). [0003] Traditional semiconductor quantum dots contain heavy metal elements (such as cadmium) that are toxic to the environment and biological applications. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/65G01N21/64
Inventor 谭明乾唐荣马小军
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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