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Near-infrared long-afterglow luminescent material, fluorescent probe as well as preparation method and application of near-infrared long-afterglow luminescent material

A technology of luminescent materials and external length, applied in luminescent materials, material analysis through optical means, analysis of materials, etc., can solve the problem of insufficient efficiency of near-infrared long afterglow luminescent materials, and achieve large-scale industrial application with broad prospects, simple process, easy-to-achieve effects

Active Publication Date: 2020-11-06
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects or deficiencies in the prior art that the X-ray activated near-infrared long-lasting luminescent material is not efficient enough, and to provide a near-infrared long-lasting luminescent material

Method used

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  • Near-infrared long-afterglow luminescent material, fluorescent probe as well as preparation method and application of near-infrared long-afterglow luminescent material
  • Near-infrared long-afterglow luminescent material, fluorescent probe as well as preparation method and application of near-infrared long-afterglow luminescent material
  • Near-infrared long-afterglow luminescent material, fluorescent probe as well as preparation method and application of near-infrared long-afterglow luminescent material

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Embodiment 1

[0064] This embodiment provides a near-infrared long afterglow luminescent bulk material LaGa 0.998 Cr 0.001 Sb 0.001 o 3 (which is ), synthesized by high-temperature solid-state reaction. The specific process is as follows: design the near-infrared long afterglow luminescent material according to the general formula of the above chemical composition. Lanthanum oxide (La 2 o 3 ), gallium oxide (Ga 2 o 3 ), chromium oxide (Cr 2 o 3 ) and antimony oxide (Sb 2 o 3 ) as raw materials, according to the stoichiometric ratio of each element, four compound raw materials were weighed and mixed respectively, and the molar ratio of each element was La:Ga:O:Cr:Sb=1:0.998:3:0.001:0.001.

[0065] After the mixture is ground and mixed evenly, put it into a corundum crucible with a cover, and then place it in a box-type resistance furnace. First, it will be pre-fired at 900°C for 6 hours in an air atmosphere, and then cooled to room temperature with the furnace. After grinding, i...

Embodiment 2

[0067] This embodiment provides a near-infrared long afterglow luminescent bulk material LaGa 0.994 Cr 0.003 Sb 0.003 o 3 (which is ), synthesized by high-temperature solid-state reaction. The specific process is as follows: design the near-infrared long afterglow luminescent material according to the general formula of the above chemical composition. Lanthanum oxide (La 2 o 3 ), gallium oxide (Ga 2 o 3 ), chromium oxide (Cr 2 o 3 ) and antimony oxide (Sb 2 o 3 ) as raw materials, according to the stoichiometric ratio of each element, four compound raw materials were weighed and mixed respectively, and the molar ratio of each element was La:Ga:O:Cr:Sb=1:0.994:3:0.003:0.003.

[0068] After the mixture is ground and mixed evenly, put it into a corundum crucible with a cover, and then put it in a box-type resistance furnace. First, it will be pre-fired at 1000°C for 2 hours in an air atmosphere, and then cooled to room temperature with the furnace. After grinding, it...

Embodiment 3

[0070] This embodiment provides a near-infrared long afterglow luminescent bulk material LaGa 0.98 Cr 0.01 Sb 0.01 o 3 (which is ), synthesized by high-temperature solid-state reaction. The specific process is as follows: design the near-infrared long afterglow luminescent material according to the general formula of the above chemical composition. Lanthanum oxide (La 2 o 3 ), gallium oxide (Ga 2 o 3 ), chromium oxide (Cr 2 o 3 ) and antimony oxide (Sb 2 o 3 ) as raw materials, according to the stoichiometric ratio of each element, four compound raw materials were weighed and mixed respectively, and the molar ratio of each element was La:Ga:O:Cr:Sb=1:0.98:3:0.01:0.01.

[0071] After the mixture is ground and mixed evenly, put it into a corundum crucible with a cover, and then place it in a box-type resistance furnace. Firstly, it is pre-fired at 1100°C for 5 hours in an air atmosphere, and then cooled to room temperature with the furnace. After grinding, it is cal...

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Abstract

The invention relates to a near-infrared long-afterglow luminescent material, a fluorescent probe as well as a preparation method and application thereof. The chemical composition of the near-infraredlong-afterglow luminescent material is LaGa1-x-yCrxSbyO3, x is greater than or equal to 0.001 and less than or equal to 0.03, and y is greater than or equal to 0.001 and less than or equal to 0.03. According to the near-infrared long-afterglow luminescent material provided by the invention, LaGaO3 is used as a matrix, and ions Cr < 3 + > and Sb < 3 + > are doped to optimize the afterglow performance; the obtained near-infrared long-afterglow luminescent material can be effectively excited by X-rays to generate afterglow emission at 750nm, the afterglow lasting time is as long as 500 hours, and the near-infrared long-afterglow luminescent material has a wide application prospect in photoelectric devices or biological imaging; particularly, the nano-granular near-infrared long-afterglow luminescent material can be prepared into a fluorescent probe for in-vivo imaging, and a better imaging effect can be obtained under the excitation of low-dose X-rays.

Description

technical field [0001] The invention belongs to the technical field of near-infrared luminescent materials and biological imaging applications, and in particular relates to a near-infrared long-lasting luminescent material, a fluorescent probe and a preparation method and application thereof. Background technique [0002] Optical imaging uses fluorescent probes as a medium to help humans visualize and monitor living targets, extending and directly applied to fields such as pharmacology, cell biology, and diagnostics. However, this technology still has many limitations, especially the tissue autofluorescence effect generated by in situ excitation in vivo, and the weak tissue penetration ability of excitation light and emission light at the same time, these factors limit the development of the field of medical imaging . Since long afterglow materials can still observe continuous emission after being excited by X-rays, ultraviolet light, visible light, and electron beams, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78G01N21/35G01N21/64
CPCC09K11/7701G01N21/35G01N21/6428G01N2021/6439
Inventor 王静刘伯梅
Owner SUN YAT SEN UNIV
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