Composite fluorescent material with multiple fluorescence characteristics as well as preparation method and application thereof

A technology of compound fluorescence and fluorescence characteristics, applied in the direction of luminescent materials, fluorescence/phosphorescence, material analysis by optical means, etc., can solve the problem of reducing the dissolution effect, etc., to improve the fluorescence luminescence intensity, high fluorescence luminescence intensity, and reduce fluorescence quenching. effect of extinction

Pending Publication Date: 2021-12-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(2) Although the increase in particle size can increase its luminous intensity, its dissolution effect in solvents is significantly reduced

Method used

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  • Composite fluorescent material with multiple fluorescence characteristics as well as preparation method and application thereof
  • Composite fluorescent material with multiple fluorescence characteristics as well as preparation method and application thereof
  • Composite fluorescent material with multiple fluorescence characteristics as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A composite fluorescent material with multi-fluorescent properties, the preparation method of which comprises the following steps:

[0030] (1) Add europium nitrate, diphenyltriacetic acid, and 2-carboxyphenylboronic acid into N,N-dimethylformamide aqueous solution for ultrasonic dissolution to obtain rare earth metal europium precursor liquid A, europium nitrate, diphenyltriacetic acid and The mass ratio of 2-carboxyphenylboronic acid is 1:0.3:0.2, the volume fraction of N,N-dimethylformamide aqueous solution is 70vol.%, the solid-liquid of europium nitrate and N,N-dimethylformamide aqueous solution The ratio is 1:0.16; in the rare earth metal europium precursor liquid, the mass ratio of phenyltriacetic acid and 2-carboxyphenylboronic acid is 2:1. The power of ultrasonic dispersion is 500W, the ultrasonic frequency is 150Hz, and the ultrasonic time is 1h.

[0031] (2) Rare earth metal europium precursor liquid A was reacted for 16 hours under the conditions of heating...

Embodiment 2

[0040] A composite fluorescent material with multi-fluorescent properties, the preparation method of which comprises the following steps:

[0041] (1) Add rare earth metal salts, benzoic acid derivatives, and carboxyphenylboronic acid derivatives into N,N-dimethylformamide aqueous solution and ultrasonically dissolve to obtain rare earth metal precursor liquid A, rare earth metal salts, and benzoic acid derivatives The mass ratio of carboxyphenylboronic acid derivatives is 1:0.4:0.1, the volume fraction of N,N-dimethylformamide aqueous solution is 90vol.%, the ratio of rare earth metal salt and N,N-dimethylformamide aqueous solution The solid-liquid ratio is 1:0.3; the power of ultrasonic dispersion is 100W, the ultrasonic frequency is 100Hz, and the ultrasonic time is 1h.

[0042] The rare earth metal salt is a mixture of europium chloride and gadolinium nitrate in a molar mass ratio of 3:1.

[0043] The benzoic acid derivative is a mixture of benzoic acid and isophthalic ac...

Embodiment 3

[0054] A composite fluorescent material with multi-fluorescent properties, the preparation method of which comprises the following steps:

[0055] (1) Add rare earth metal salts, benzoic acid derivatives, and carboxyphenylboronic acid derivatives into N,N-dimethylformamide aqueous solution and ultrasonically dissolve to obtain rare earth metal precursor liquid A, rare earth metal salts, and benzoic acid derivatives , The mass ratio of carboxyphenylboronic acid derivatives is 1:0.2:0.3, the volume fraction of N,N-dimethylformamide aqueous solution is 50vol.%, the ratio of rare earth metal salt and N,N-dimethylformamide aqueous solution The solid-liquid ratio is 1:0.03; the power of ultrasonic dispersion is 300W, the ultrasonic frequency is 50Hz, and the ultrasonic time is 2h.

[0056] The rare earth metal salt is a mixture of dysprosium carbonate and samarium sulfate prepared at a molar mass ratio of 1:1.

[0057] The benzoic acid derivative is a mixture of phthalic acid, tere...

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Abstract

The invention discloses an organic composite fluorescent material loaded with perovskite nanocrystals or a composite material thereof and having a microflower-shaped rare earth metal skeleton structure. Due to the excellent aggregation-induced emission effect of the micron-sized rare earth metal skeleton structure organic particles, the micron-sized rare earth metal skeleton structure organic particles have high fluorescence intensity. Meanwhile, the flower-shaped structure has the characteristics of large specific surface area and multiple active sites, so that the attachment and dispersion of the perovskite nanocrystal or the composite material thereof are facilitated, and furthermore, the fluorescence quenching phenomenon of the perovskite nanocrystal or the composite material thereof can be reduced, and the fluorescence intensity of the perovskite nanocrystal or the composite material thereof can be improved. In addition, the organic composite fluorescent material with the perovskite-rare earth metal skeleton structure has a multi-fluorescence characteristic and can be used for identifying various ions and small molecules.

Description

technical field [0001] The invention belongs to the field of photoelectric material development and application, and in particular relates to a composite fluorescent material with multi-fluorescent properties and its preparation method and application. Background technique [0002] Metal-framework organic compounds (MOFs) exhibit good optical, magnetic, adsorption / separation properties due to their structural advantages such as diverse spatial structures, highly regular structures, high thermal stability, adjustable pore size, large specific surface area, and high porosity. , catalytic properties, so that it has a wide range of research and applications in the fields of gas adsorption and separation, sensors, drug sustained release, catalytic reactions, etc. In recent years, organic compounds with metal framework structures in which rare earth elements serve as metal sites also show excellent fluorescence effects. Among them, rare earth metal framework organic compounds wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/66G01N21/64
CPCC09K11/06C09K11/665G01N21/6428C09K2211/182
Inventor 张琦李双寿季林红林红汤彬杨建新李睿王健美马运王群
Owner TSINGHUA UNIV
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