Method for enhancing fluorescence of upconversion material

A technology for fluorescence enhancement and conversion materials, which is applied in nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, and can solve the problems of low luminous efficiency

Inactive Publication Date: 2015-05-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low luminous efficiency of the existing up-conversion materials, and provide a method for enhancing the fluorescence of the up-conversion materials

Method used

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  • Method for enhancing fluorescence of upconversion material
  • Method for enhancing fluorescence of upconversion material
  • Method for enhancing fluorescence of upconversion material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of Upconverting Nanoparticles

[0036] 0.78 mmol GdCl 3 ·6H 2 O, 0.2 mmol YbCl 3 ·6H 2 O, 0.02 mmol ErCl 3 ·6H 2 O is placed in a reaction vessel, and the high boiling point organic solvent oleic acid and 1-octadecene are mixed in a volume ratio of 2:5 as the reaction solvent. After fully stirring, the temperature is raised to 140°C to form a homogeneous phase and then cooled to room temperature (25°C). , slowly added 5 mL containing NaOH (2.5 mmol) and NH 4 The methanol solution of F (4 mmoles) was fully stirred and heated to 70° C. to evaporate the methanol, and after the methanol was evaporated, the temperature was raised to 300° C. and reacted for 1.5 hours to obtain up-conversion nanoparticles; figure 1 It is the powder X-ray diffraction spectrum of the up-conversion nanoparticles. It can be seen from the figure that it is consistent with the standard card, indicating that β-NaGdF was successfully prepared. 4 .

[0037] 2. Homogeneous coating...

Embodiment 2

[0045] 1. Preparation of Upconverting Nanoparticles

[0046] 0.78 mmol YCl 3 ·6H 2 O, 0.2 mmol YbCl 3 ·6H 2 O, 0.02 mmol ErCl 3 ·6H 2 O is placed in a reaction vessel, and the high boiling point organic solvent oleic acid and 1-octadecene are mixed at a volume ratio of 2:5 as the reaction solvent. After stirring thoroughly, the temperature is raised to 160°C, and a homogeneous phase is formed, then cooled to room temperature (25°C) , slowly added 5 mL containing NaOH (2.5 mmol) and NH 4 The methanol solution of F (4 mmoles) was fully stirred and heated to 90° C. to evaporate the methanol, and after the methanol was evaporated, the temperature was raised to 290° C. and reacted for 3 hours to obtain up-conversion nanoparticles;

[0047] 2. Homogeneous coating of nanoparticles

[0048] 0.122 g of YCl 3 ·6H 2 O was placed in a reaction solvent mixed with oleic acid and 1-octadecene at a volume ratio of 2:5, stirred thoroughly and then heated to 160°C to dissolve, forming ...

Embodiment 3

[0054] 1. Preparation of Upconverting Nanoparticles

[0055] 0.76 mmol GdCl 3 ·6H 2 O, 0.2 mmol YbCl 3 ·6H 2 O, 0.04 mmol TmCl 3 ·6H 2 O is placed in a reaction vessel, and the high boiling point organic solvent oleic acid and 1-octadecene are mixed at a volume ratio of 2:5 as the reaction solvent. After stirring thoroughly, the temperature is raised to 150°C, and a homogeneous phase is formed, then cooled to room temperature (25°C) , slowly added 5 mL containing NaOH (2.5 mmol) and NH 4 The methanol solution of F (4 mmoles) was fully stirred and heated to 80° C. to evaporate the methanol, and after the methanol was evaporated, the temperature was raised to 320° C. and reacted for 1 hour to obtain up-conversion nanoparticles;

[0056] 2. Homogeneous coating of nanoparticles

[0057] 0.145 g of GdCl 3 ·6H 2 O was placed in a reaction solvent mixed with oleic acid and 1-octadecene at a volume ratio of 2:5, stirred thoroughly and then heated to 150°C to dissolve, forming...

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Abstract

The invention provides a method for enhancing fluorescence of an upconversion material, belonging to the field of inorganic chemical materials. The method solves the problem of low luminescence efficiency in the existing upconversion material. The method combines the homogeneous coating structure with the noble metal shell structure for the first time, and utilizes the noble metal plasma resonance effect to further enhance the fluorescence emission intensity of the system. The experimental result indicates that the method can enhance the fluorescence emission intensity of the upconversion luminescent material by 5 times.

Description

technical field [0001] The invention belongs to the field of inorganic chemical materials, and in particular relates to a method for realizing fluorescence enhancement of up-conversion materials. Background technique [0002] In recent years, with the rapid development of nanoscience and technology, nanoscale upconversion fluorescent materials, as a new type of fluorescent marker, have been paid attention to in the fields of biological system sensing and medical imaging, and have become important targets in many fields such as photochemistry, biology, and materials science. The intersection and development frontier of various disciplines. For example, rare earth up-conversion luminescent materials can emit visible light under the excitation of near-infrared light through multi-photon absorption. Low, high signal-to-noise ratio and detection sensitivity, high penetration depth and other advantages. [0003] The many advantages of up-conversion materials provide new ideas in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02B82Y30/00B82Y40/00
Inventor 李斌张馨丹张黎明
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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