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A kind of rare earth luminescent nanomaterial based on aggregation induction effect and its preparation method and application

A technology of aggregation-induced effect and rare earth luminescence, applied in luminescent materials, nanotechnology for materials and surface science, material analysis by optical means, etc., to achieve the effect of strong dispersion and simple preparation method

Inactive Publication Date: 2020-01-21
LUOYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Researchers have analyzed the mechanism of this phenomenon in detail, indicating that the rotation and vibration of molecules in the aggregated state will be greatly restricted, thus causing the AIE phenomenon.

Method used

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  • A kind of rare earth luminescent nanomaterial based on aggregation induction effect and its preparation method and application
  • A kind of rare earth luminescent nanomaterial based on aggregation induction effect and its preparation method and application
  • A kind of rare earth luminescent nanomaterial based on aggregation induction effect and its preparation method and application

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Effect test

Embodiment 1

[0047] The embodiment of the present invention provides a preparation method of compound A, comprising the following steps:

[0048] In an electronic analytical balance, weigh 500 mg of 1,2,2-triphenyl-1-p-bromophenylethylene, 217.95 mg of 5-formyl-2-thiopheneboronic acid, and 140.463 mg tetra Triphenylphosphopalladium, measure 6.07ml of potassium carbonate solution (10mM) with a graduated cylinder and pour it into it, add a certain amount of solvent toluene, then add a suitable magnet, then feed nitrogen into the liquid above the liquid surface to discharge the air, Turn on the stirring and heating button, and adjust the temperature to 115°C. When the temperature rises to 115°C, start timing, heat and stir the reaction for 24 hours under the protection of nitrogen, cool down, and then point the plate, and compare it with the raw material to see if the reaction is complete. If the reaction is complete, proceed to the next step, the separation and purification of the product. ...

Embodiment 2

[0054] The embodiment of the present invention provides a method for preparing rare earth luminescent nanomaterials based on the aggregation-inducing effect, including the following steps:

[0055] Get compound A, polyethyleneimine (PEI), Eu(NTA) obtained in embodiment 1 of the present invention 3 , compound A solution TPE-S-CHO, polyethyleneimine (PEI) solution, Eu(NTA) 3 solution, and marked as ①, ②, ③, pipette 1ml from it with a pipette gun, the concentration is 1.0×10 -2 mol / L solution ①, solution ② with a concentration of 10mM, and solution ③ with a concentration of 1mM were recorded as sample No. 1, sample 2, and sample 3 as mother solutions; Put it into a small test tube, then take 1uL of mother solution No. 3 and mix it with it in the small test tube to obtain mixture 1; use a pipette gun to take 1uL of mother solution No. 2 and put it into the small test tube, then take 100uL of distilled water and mix it in the small test tube to obtain mixture 2; Mixture 2 was add...

Embodiment 3

[0071] The embodiment of the present invention provides a method for preparing rare earth luminescent nanomaterials based on the aggregation-inducing effect, including the following steps:

[0072](1) Preparation of Compound A: In an electronic analytical balance, weigh 500 mg of 1,2,2-triphenyl-1-p-bromophenylethylene and 190.28 mg of 5-formyl- 2-thiophene boronic acid, 140.463mg tetrakistriphenyl phosphopalladium, measure 6.07ml potassium carbonate solution 10mM with a graduated cylinder, pour it into it, add a certain amount of solvent toluene, then add a suitable magnet, and then pass nitrogen gas into the liquid surface Exhaust the air above, turn on the stirring and heating button, and adjust the temperature to 100°C. When the temperature rises to 100°C, start timing, heat and stir the reaction for 36 hours under the protection of nitrogen, cool down, and then point the plate, and compare it with the raw material to see if the reaction is complete. If the reaction is com...

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Abstract

The invention discloses a rare-earth luminescent nano-material based on an aggregation induction effect as well as a preparation method and application thereof. The rare-earth luminescent nano-material based on the aggregation induction effect, disclosed by the invention, is a novel rare-earth luminescent and aggregation induction effect (AIE) luminescent coexisting material; the material has a uniform microstructure and the grain diameter of grains is about 32.16nm; the preparation method disclosed by the invention is simple, and an oleophylic rare-earth europium complex luminescent componentand a compound A are introduced and the rare-earth luminescent component is covered with by nanoparticles through a co-assembly method; an aldehyde group on the surface can react with amino with polyethylenimine so that the component can be modified onto the surfaces of the particles; the material has strong dispersity in water; the rare-earth luminescent nano-material based on the aggregation induction effect has a ratio fluorescence detection behavior on hydrogen ions. Furthermore, a detection process can be circularly repeatedly used for at least 10 times through simply regulating the pH (Potential of Hydrogen) value of the solution; the rare-earth luminescent nano-material can be potentially applied to the fields including environment acidity detection, cell acid-base imaging and thelike.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a rare earth luminescent nanomaterial based on an aggregation inducing effect and a preparation method and application thereof. Background technique [0002] Fluorescent probes have been widely used in bioanalysis, medical imaging, drug tracking, etc. due to their good biocompatibility, easy synthesis, and high-sensitivity spatio-temporal resolution, and thus become a hot topic for chemists. . However, most of the traditional fluorescent materials have a serious disadvantage: strong fluorescence can only be emitted in the solution state, but when aggregates are formed or prepared into a thin film state, the aggregation fluorescence quenching phenomenon is inevitable. occur. Since fluorescent materials are in the form of aggregation and thin films in specific applications, aggregation-induced fluorescence quenching has become a major problem in the practical applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06G01N21/64B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/025C09K11/06C09K2211/182G01N21/643G01N21/6486G01N2021/6432
Inventor 周战傅红如毋乃腾孙涛乔晓光
Owner LUOYANG NORMAL UNIV
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