Preparation method of CeCl3:Eu<3+> fluorescent probe array

A fluorescent probe and array technology, applied in the field of materials science, can solve the problems of poor photochemical stability, inferior to rare earth fluorescent probes, and quantum dot fluorescent probes whose emission wavelength is easily affected by the external environment, etc.

Active Publication Date: 2019-11-05
HEFEI UNIV
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Problems solved by technology

The CdTe quantum dot fluorescent probe prepared by this process is relatively cumbersome, and the emission wavelength of the quantum dot fluorescent probe is easily affected by t

Method used

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  • Preparation method of CeCl3:Eu&lt;3+&gt; fluorescent probe array
  • Preparation method of CeCl3:Eu&lt;3+&gt; fluorescent probe array
  • Preparation method of CeCl3:Eu&lt;3+&gt; fluorescent probe array

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preparation example Construction

[0064] a CeCl 3 :Eu 3+ The preparation method of fluorescent probe array is characterized in that: the CeCl 3 :Eu 3+ The emission band of the fluorescent probe is red fluorescence, and its surface contains a carboxyl hydrophilic group, CeCl 3 :Eu 3+The negatively charged carboxyl groups on the surface of the fluorescent probe and the positively charged paraquat molecules attract each other through the interaction between anions and cations. When they are close to each other in space, fluorescence resonance energy transfer occurs, resulting in the CeCl in the red spectral band. 3 :Eu 3+ The fluorescence intensity of the fluorescent probe is reduced to realize the selective recognition and detection of paraquat molecules, and the CeCl 3 :Eu 3+ The preparation process of fluorescent probe array includes the following four steps:

[0065] The first step is CeCl 3 :Eu 3+ Preparation of the activator solution of the fluorescent probe array: First, accurately weigh 1.6550 ~ ...

specific Embodiment

[0070] a CeCl 3 :Eu 3+ The preparation method of fluorescent probe array, at first, CeCl 3 :Eu 3+ Activator solution preparation for fluorescent probes, followed by CeCl 3 :Eu 3+ Preparation of fluorescent probe matrix solution, then, CeCl 3 :Eu 3+ Fluorescent probe preparation, and finally, CeCl 3 :Eu 3+ The preparation of fluorescent probe array is characterized in that the CeCl 3 :Eu 3+ The emission band of the fluorescent probe is red fluorescence, and its surface contains a carboxyl hydrophilic group, CeCl 3 :Eu 3+ The negatively charged carboxyl groups on the surface of the fluorescent probe and the positively charged paraquat molecules attract each other through the interaction between anions and cations. When they are close to each other in space, fluorescence resonance energy transfer occurs, resulting in the CeCl in the red spectral band. 3 :Eu 3+ The fluorescence intensity of the fluorescent probe is reduced to realize the selective recognition and detec...

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Abstract

A preparation method of a CeCl3:Eu<3+> fluorescent probe array comprises the following four steps: 1, preparing a Eu(NO3)3 solution by using EuO to obtain an activator solution; 2, preparing a substrate solution by using Ce(NO3)3; 3, adjusting the pH value of a mixed solution formed by Eu(NO3)3, Ce(NO3)3, NaCl and citric acid to 6.0, and performing a reaction to obtain a CeCl3:Eu<3+> fluorescent probe; and 4, and performing silicon chip treatment and ion etching to obtain the fluorescent probe array. The emission spectrum band is red, and the negatively charged carboxyl group on the surface ofthe CeCl3:Eu<3+> fluorescent probe and a positively charged paraquat molecule spatially get close to each other due to anion and cation interaction, so fluorescence resonance energy transfer occurs,the fluorescence intensity of the fluorescent probe array is reduced, selective identification and detection of the paraquat molecule are realized, and the detection limit is 10<-9> mol.L<-1>.

Description

technical field [0001] The invention relates to the field of material science, in particular to CeCl with paraquat detection 3 :Eu 3+ Preparation method of fluorescent probe array. Background technique [0002] Paraquat (Paraquat) is a fast-killing herbicide with contact action and certain systemic action. The chemical name is 1-1-dimethyl-4-4-bipyridine cationic salt, which can be quickly absorbed by the green tissue of plants , so that it dies, it can control various annual weeds, has a strong killing effect on perennial weeds, and has no effect on non-green tissues. In the soil, it quickly combines with the soil to passivate, and is ineffective for plant roots, perennial rhizomes and perennial roots. Paraquat is extremely toxic to humans and has no specific antidote. It has been banned or strictly restricted in more than 20 countries. The diagnosis of paraquat poisoning is mainly based on the history of exposure and the clinical manifestations of mainly lung damage ac...

Claims

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Application Information

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IPC IPC(8): C09K11/85G01N21/64
CPCC09K11/779G01N21/6428G01N2021/6432
Inventor 高大明刘辰辰陈红张立冬陈倩云张慧张凌云朱德春刘安求王晓晨张宇刚
Owner HEFEI UNIV
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