Up-conversion luminescent nanometer material and core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence

A technology of fluorescent nanomaterials and long afterglow luminescence, applied in the field of core-shell fluorescent nanomaterials

Active Publication Date: 2020-02-28
ASSURE TECH HANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to meet the requirements of different detection conditions and overcome the shortcomings of a single material, the present invention provides a new up-conversion luminescence nanomaterial and a down-conversion luminescence nanomaterial, and combines a rare earth up-conversion fluorescent material with a down-conversion long afterglow material, Preparation of materials with both up-conversion fluorescence and down-conversion long-lasting properties

Method used

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  • Up-conversion luminescent nanometer material and core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence
  • Up-conversion luminescent nanometer material and core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence
  • Up-conversion luminescent nanometer material and core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: BaSrY 0.95 La 0.05 f 7 :Yb 3+ 0.98 , Er 3+ 0.02 Preparation of nanoparticles:

[0047] Weigh 0.042g BaCl according to the stoichiometric ratio according to the chemical formula 2 , 0.032g SrCl 2 , 0.0004g La 2 o 3 , into a 100ml three-necked flask, 15ml of trifluoroacetic acid was added, the temperature was raised to 50°C, and stirred for 0.5h. Then weigh 0.037gYCl in proportion 3 , 0.055g YbCl 3 , 0.0012g ErCl 3, dissolved in 10ml of deionized water, and added to a three-neck flask, heated to 120°C, added 30ml of oleic acid and 30ml of octadecene, and continued magnetic stirring at 120°C for 0.5h to remove water and oxygen. Under the protection of argon, the above mixed solution was heated to 330° C. at a heating rate of about 8° C. / min, and reacted under vigorous stirring for one hour to fully complete the reaction. During the synthesis, the argon gas was pumped out. The mixture was cooled to room temperature and precipitated by acetone, and ...

Embodiment 2

[0048] Example 2: Ba 1.4 Sr 0.6 Y 0.95 La 0.05 f 7 :Yb 3+ 0.9 , Tm 3+ 0.1 Preparation of nanoparticles

[0049] According to the chemical formula, weigh 0.058g BaCl according to the stoichiometric ratio 2 , 0.019g SrCl 2 , 0.004g La 2 o 3 , into a 100ml three-necked flask, 15ml of trifluoroacetic acid was added, the temperature was raised to 50°C, and stirred for 0.5h. Then weigh 0.037gYCl in proportion 3 , 0.050g YbCl 3 , 0.0055g TmCl 3 , dissolved in 10ml of deionized water, and added to a three-neck flask, heated to 120°C, added 30ml of oleic acid and 30ml of octadecene, and continued magnetic stirring at 120°C for 0.5h to remove water and oxygen. Under the protection of argon, the above mixed solution was heated to 330° C. at a heating rate of about 8° C. / min, and reacted under vigorous stirring for one hour to fully complete the reaction. During the synthesis, the argon gas was pumped out. The mixture was cooled to room temperature and precipitated by ace...

Embodiment 3

[0050] Example 3.BaSrY 0.8 La 0.2 f 7 :Yb 3+ 0.95 , Ho 3+ 0.05 Preparation of nanoparticles

[0051] Weigh 0.042g BaCl according to the stoichiometric ratio according to the chemical formula 2 , 0.032g SrCl 2 , 0.013g La 2 o 3 , into a 100ml three-necked flask, 15ml of trifluoroacetic acid was added, the temperature was raised to 50°C, and stirred for 0.5h. Then weigh 0.031gYCl in proportion 3 , 0.053g YbCl 3 , 0.003g HoCl 3 , dissolved in 10ml of deionized water, and added to a three-neck flask, heated to 120°C, added 30ml of oleic acid and 30ml of octadecene, and continued magnetic stirring at 120°C for 0.5h to remove water and oxygen. Under the protection of argon, the above mixed solution was heated to 330° C. at a heating rate of about 8° C. / min, and reacted under vigorous stirring for one hour to fully complete the reaction. During the synthesis, the argon gas was pumped out. The mixture was cooled to room temperature and precipitated by acetone, and centr...

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Abstract

The invention relates to an up-conversion luminescent nanometer material and a preparation method thereof, and a core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence, and a preparation method thereof, wherein the inner core is an up-conversion luminescent nanometer material, the structural general formula is Ba(2-x)SrxY(1-y)LayF7:zRE<3+>, RE is one or a plurality of elements selected from Nd, Yb, Er, Ho, Tm and the like, x is greater than or equal to 0.1 and less than or equal to 1, y is greater than or equal to 0.01 and less than or equal to 0.3, z is greater than or equal to 0.001 and less than or equal to 0.1, the shell is a down-conversion long-afterglow luminescent nanometer material, the structural general formula is Ca (1-x)SrxAl(1-y)GayF5:zCr<3+>, x is greater than or equal to 0.01 and less than or equal to 0.5, y is greater than 0 and less than or equal to 0.7, and z is greater than or equal to 0.01 and less than or equal to 1. According to the invention, the up-conversion luminescent nanometer material can absorb 1.5 [mu]m near-infrared long-wave region energy and emit green light of about 540 nm, has a fluorescence lifetime of 500-600 [mu]m, and has characteristics of high fluorescence emission intensity and long light lifetime, wherein the excitation of the up-conversion luminescent nanometer material is in a human eye safety region; and the core-shell type fluorescent nanometer material integrating up-conversion luminescence and down-conversion long afterglow luminescence can absorb ultraviolet light and emit long-life afterglow, and can be excited by light with a wavelength of 1.5 [mu]m to emit up-conversion fluorescence with high intensity.

Description

technical field [0001] The invention relates to the field of nanometers; in particular, it relates to up-conversion luminescence nanomaterials, down-conversion luminescence nanomaterials and the synthesis of a specific core-shell type fluorescent nanomaterial, which is characterized in that it can simultaneously emit high-intensity, long-lived up-conversion fluorescence and down conversion long persistence. Background technique [0002] With the development of modern medicine and molecular biology, bioluminescent detection and bioimaging technologies have been widely used in the field of biomedicine, and bioluminescent labeling materials have increasingly attracted the attention of researchers in chemistry, materials, biology and other disciplines. At present, bioluminescent labeling materials that are more active in research mainly include organic dyes, semiconductor quantum dots, transition metal-doped long-lasting luminescent materials and rare earth-doped nano-luminescen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85C09K11/02C09K11/64B82Y30/00B82Y40/00
CPCC09K11/7773C09K11/676C09K11/02B82Y30/00B82Y40/00
Inventor 凌世生李宜莲陈东
Owner ASSURE TECH HANGZHOU
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