Fluorescent probe based on lanthanide ion hybrid covalent organic framework material as well as preparation method and application of fluorescent probe

A technology of covalent organic frameworks and fluorescent probes, applied in chemical instruments and methods, luminescent materials, fluorescence/phosphorescence, etc., can solve the problems of further improvement of photostability, reduce quenching effect, reduce coordination, Increases the effect of stability and uniformity

Pending Publication Date: 2022-07-05
CHINA JILIANG UNIV
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Problems solved by technology

However, there are still some problems in the field of lanthanide organic / inorganic hybrids: (1) The photostability of these hybrid systems, especially in the water environment, needs to be further improved
(2) In complex systems or actual samples, the anti-interference detection ability of lanthanide hybrid luminescent materials needs to be improved [3]

Method used

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  • Fluorescent probe based on lanthanide ion hybrid covalent organic framework material as well as preparation method and application of fluorescent probe
  • Fluorescent probe based on lanthanide ion hybrid covalent organic framework material as well as preparation method and application of fluorescent probe

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Embodiment Construction

[0019] The invention discloses a fluorescent probe based on a lanthanide ion hybrid covalent organic framework material, a preparation method and an application. The carboxylated covalent organic framework is added to a lanthanide compound solution, and a lanthanide ion hybrid is obtained by a coordination reaction. Chemical covalent organic framework materials.

[0020] The specific preparation steps are:

[0021] 1) Mix the hydroxyl-containing amine monomer and p-toluenesulfonic acid uniformly to obtain a viscous salt, add quantitative aldehyde monomer and mix well, add a small amount of deionized water to the mixture to form a dough, and heat at 170 ° C for 5 minutes , in which the concentration of amine monomers in the mixture is 1.5 times that of aldehyde monomers.

[0022] 2) The precipitate obtained in step 1) was washed with a large amount of hot water, N,N-dimethylformamide dimethyl acetal and acetone in turn, centrifuged, and dried at 55° C. for 12 hours.

[0023] ...

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Abstract

The invention discloses a fluorescent probe based on a lanthanide ion hybrid covalent organic framework material as well as a preparation method and application thereof. The lanthanide ion hybrid covalent organic framework material is prepared from a carboxylated imine type covalent organic framework and europium chloride hexahydrate through a coordination reaction; according to the lanthanide ion hybrid covalent organic framework material disclosed by the invention, not only is the strong affinity of a covalent organic framework to target molecules extracted and enriched, the sensitivity is improved, but also carboxylate radicals are coordinated with lanthanide ions, a new fluorescence center is formed, and environmental interference is reduced. The constructed lanthanide ion hybrid covalent organic framework material can be used for constructing a high-performance fluorescent probe which is high in sensitivity, high in selectivity and high in stability and is used for detecting tetracycline.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to a fluorescent probe based on a lanthanide ion hybridized covalent organic framework material, a preparation method and application thereof. Background technique [0002] Lanthanide Rare Earth Metal Ions (Ln 3+ ) has the characteristics of sharp characteristic fluorescence peak shape, high color purity and resolution, and its large Stokes shift, which is conducive to eliminating external interference, etc. It is an excellent material for the preparation of fluorescent probes [1] . But since Ln 3+ It has a small molar absorption coefficient and f-f forbidden transition, which weakens the light absorption ability of this ion, and can only be excited in a few special wavebands, which limits its application. With lanthanide ions (Ln 3+ ) or lanthanide luminescent complexes as the guest, with organic materials or inorganic materials as the main matrix, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08G83/00G01N21/64
CPCC08G83/008C09K11/06G01N21/643C09K2211/182G01N2021/6432Y02A50/30
Inventor 李巍霞季杰强姜磊楼超艳赵黎明
Owner CHINA JILIANG UNIV
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