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Rare earth luminescent material with enhanced visible light/NIR-II emission

A rare earth luminescence, near-infrared technology, applied in luminescent materials, nanotechnology for materials and surface science, preparations for in vivo experiments, etc., can solve the problems of low quantum yield, limitations, etc., to achieve uniform particle size distribution , the fluorescence lifetime, the effect of deep tissue penetration depth

Active Publication Date: 2021-06-08
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low quantum yield of small organic molecules in aqueous environments, its application in biological imaging in the second near-infrared region is limited.

Method used

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  • Rare earth luminescent material with enhanced visible light/NIR-II emission
  • Rare earth luminescent material with enhanced visible light/NIR-II emission
  • Rare earth luminescent material with enhanced visible light/NIR-II emission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Add 0.3415g (0.895mmol) ErCl 3 ·6H 2 O, 0.0387g (0.1mmol) YbCl 3 ·6H 2 O, 0.0019g (0.005mmol) TmCl 3 Add 6 mL of oleic acid and 15 mL of octadecene into a 100 mL three-necked flask, and stir at 160°C for 60 minutes under an anhydrous, oxygen-free, argon protective atmosphere to form a uniform transparent pale pink liquid. Then the system was lowered to room temperature, and dissolved with 0.1g (2.5mmol) NaOH and 0.1482g (4mmol) NH 4 10mL of methanol solution of F, stir at room temperature for 60 minutes, heat up to 55-60°C, continue to stir for 60 minutes to remove methanol, then heat up to 110-120°C and vacuum for 20 minutes, and finally heat up to 300°C for 60 minutes. The temperature of the system was lowered to room temperature, and washed by centrifugation with absolute ethanol to obtain NaErF 4 : 10% Yb, 0.5% Tm rare earth luminescent material (nuclear material).

[0029] 2. Add 0.1394g (0.375mmol) GdCl 3 ·6H 2 O, 0.0388g (0.1mmol) YbCl 3 ·6H 2 O, 0.0...

Embodiment 2

[0036] In step 2 of Example 2, GdCl 3 ·6H 2 The amount of O used is 0.1468g, CeCl 3 ·6H 2 The consumption of O is 0.0018g, and other steps are identical with embodiment 1, make NaErF 4 :10%Yb,0.5%Tm@NaGdF 4 : 20% Yb, 1% Ce rare earth luminescent material.

Embodiment 3

[0038] In step 2 of Example 3, GdCl 3 ·6H 2 The amount of O used is 0.1431g, CeCl 3 ·6H 2 The consumption of O is 0.0053g, and other steps are identical with embodiment 1, makes NaErF 4 :10%Yb,0.5%Tm@NaGdF 4 : 20% Yb, 3% Ce rare earth luminescent material.

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Abstract

The invention discloses a rare earth luminescent material with enhanced visible light / NIR-II emission. The structural formula of the material is NaErF4: 10% Yb, 0.5% Tm@NaGdF4: 20% Yb, and X% Ce@NaGdF4, X = 1-10, the particle size is 20-100 nm, and the material can be used for visible light and near-infrared two-region biological imaging. Compared with reported quantum dots, single-walled carbon nanotubes and small organic molecules with NIR-II emission, the material has the advantages of lower toxicity, narrower band gap emission, controllable size and efficient near-infrared light emission. Besides, Ce3+ is doped in the structure of the material, so that not only is the characteristic emission of Er3+ in NIR-II effectively enhanced, but also luminescence quenching of Er3+ in a visible region is avoided, and finally, the material has relatively strong up-conversion single-band red light emission and NIR-II emission at the same time. Therefore, the material as a bimodal fluorescent probe has potential application value in imaging in a visible region and NIR-II.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a novel rare-earth luminescent material with enhanced visible light / near-infrared two-region emission prepared based on a solvothermal method and an epitaxial growth method. Background technique [0002] In recent years, fluorescence imaging in the second region of near-infrared has broken into people's field of vision as a new technology, which provides higher signal-to-noise ratio and penetration depth, and shows potential advantages in disease detection, diagnosis and treatment, etc. It can provide direct visual guidance for medical procedures. The second near-infrared region is an ideal window for fluorescence imaging of deep tissue structures in mammals. Its imaging technology has been widely used in scientific research and clinical trials. Therefore, fluorescent probes in the second near-infrared region have also become fluorescent probes with bett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/85A61K49/00B82Y30/00
CPCC09K11/02C09K11/025C09K11/7773A61K49/0019B82Y30/00
Inventor 石峰莫秀兰刘苗高嘉忆王婷婷武燕龙
Owner SHAANXI NORMAL UNIV
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