Preparation method of upconversion fluorescence nanometer material with nucleocapsid structure

A technology of fluorescent nanomaterials and core-shell structure, which is applied in the field of preparation of up-conversion fluorescent nanomaterials, can solve the problems of low product dispersibility and difficult removal of cycloethane, and achieve improved dispersibility, enhanced fluorescence, and simple preparation process easy-to-use effects

Inactive Publication Date: 2016-11-16
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the prior art that cyclohexane is difficult to remove and the product dispersibility is not high, and provides a method for preparing an up-conversion fluorescent nanomaterial core-shell structure. The technical scheme is as follows:

Method used

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  • Preparation method of upconversion fluorescence nanometer material with nucleocapsid structure
  • Preparation method of upconversion fluorescence nanometer material with nucleocapsid structure
  • Preparation method of upconversion fluorescence nanometer material with nucleocapsid structure

Examples

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Embodiment 1

[0034] Upconversion fluorescent nanomaterial β-NaGdF 4 :20%Yb,2%Er@NaGdF 4 A method for preparing a core-shell structure, comprising the steps of:

[0035] (1) Prepare three kinds of solutions of 1, 2, and 3 respectively: weigh 0.4 mmol of rare earth oxide 1 (Ln 2 o 3 ), put the rare earth oxide 1 into a 50mL three-neck flask, add a small amount of deionized water (2-3mL) into it, heat up under magnetic stirring conditions, and set the temperature to 150°C. When the temperature rose to 80 °C, 1.5 mL of trifluoroacetic acid was added dropwise to the flask, and the solid was completely dissolved after a few minutes to obtain a transparent solution 1. Adopt the same method to weigh 0.6mmol rare earth oxide 2 (Gd 2 o 3 ) and 1.5mmol sodium hydroxide to prepare a transparent solution 2. Weigh 0.5mmol of sodium hydroxide solid into a 25mL three-necked flask, add a small amount of deionized water, and dropwise add 0.5mL of trifluoroacetic acid thereinto, until the solid is comp...

Embodiment 2

[0043] Upconversion fluorescent nanomaterial β-NaYbF 4 :2%Er@NaYbF 4 A method for preparing a core-shell structure, comprising the steps of:

[0044] (1) Prepare three kinds of solutions of 1, 2, and 3 respectively: weigh 0.4 mmol of rare earth oxide 1 (Ln 2 o 3 ), put the rare earth oxide 1 into a 50mL three-neck flask, add a small amount of deionized water (2-3mL) into it, heat up under magnetic stirring conditions, and set the temperature at 160°C. When the temperature rose to 80 °C, 1.5 mL of trifluoroacetic acid was added dropwise to the flask, and the solid was completely dissolved after a few minutes to obtain a transparent solution 1. Using the same method, 0.6mmol rare earth oxide 2 (Yb 2 o 3 ) and 1.5 mmol sodium hydroxide solid. Prepared as a clear solution 2. Weigh 0.5mmol of sodium hydroxide solid into a 25mL three-necked flask, add a small amount of deionized water, and dropwise add 0.5mL of trifluoroacetic acid thereinto, until the solid is completely dis...

Embodiment 3

[0049] Upconversion fluorescent nanomaterial β-NaGdF 4 :20%Yb,2%Tm@NaGdF 4 A method for preparing a core-shell structure, comprising the steps of:

[0050] (1) prepare three kinds of solutions of 1, 2 and 3 respectively: take by weighing 0.4mmol rare earth oxide 1 (Ln 2 o 3 ), put the rare earth oxide 1 into a 50mL three-neck flask, add a small amount of deionized water (2-3mL) into it, heat up under magnetic stirring conditions, and set the temperature to 150°C. When the temperature rose to 80 °C, 1.5 mL of trifluoroacetic acid was added dropwise to the flask, and the solid was completely dissolved after a few minutes to obtain a transparent solution 1. Adopt the same method to weigh 0.6mmol rare earth oxide 2 (Gd 2 o 3 ) and 1.5mmol sodium hydroxide to prepare a transparent solution 2. Weigh 0.5mmol of sodium hydroxide solid into a 25mL three-necked flask, add a small amount of deionized water, and dropwise add 0.5mL of trifluoroacetic acid thereinto, until the solid i...

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Abstract

The invention discloses a preparation method of an upconversion fluorescence nanometer material with a nucleocapsid structure. The method comprises the following steps of preparing 3 kinds of solutions by using two kinds of rare earth oxides 1 and 2, and sodium hydroxide, and then performing a series of reactions, wherein the rare earth oxide 1 consists of Yb2O3, a rare earth activated ion oxide ( Er<3+>, Tm<3+> or Ho<3+> ) and a rare earth substrate ion oxide (Gd<3+>, Y<3+>, Lu<3+>, La<3+> or Yb<3+> ), and the rare earth oxide 2 is prepared from the Yb2O3 or the rare earth activated ion oxide or the rare earth substrate ion oxide or is prepared by mixing the Yb2O3, the rare earth activated ion oxide and the rare earth substrate ion oxide in any proportions. According to the preparation method disclosed by the invention, naked shells are directly dispersed to an octadecene solution, and the step of removing cyclohexane is omitted, so that the technology is simple and convenient to operate, and in the process of forming the nucleocapsid structure, the dispersibility of the naked shells is improved, and the fluorescence intensity of the naked shells after generating the nucleocapsid structure is also notably improved. The upconversion fluorescence nanometer material has wide application values and prospects in the fields of solar batteries, display devices, laser anti-counterfeiting, an MRI radiography agent, biomedical science and the like.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a preparation method of an up-conversion fluorescent nanometer material with a core-shell structure. Background technique [0002] The excellent luminescent properties and paramagnetism of rare earth doped nanomaterials make them have wide application value and application prospects in many fields such as solar cells, display devices, laser anti-counterfeiting, MRI contrast agents, and biomedicine. Rare-earth up-conversion nano-luminescent materials have the characteristics of high chemical stability, long fluorescence lifetime, and low biological toxicity. In addition, because the near-infrared light excitation does not cause damage to materials and biological tissues, and has strong penetration ability into deep tissues, it has become a biological The best choice for medical fluorescent probes. Generally speaking, as a biomedical fluorescent probe mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/85
CPCC09K11/02C09K11/7773C09K11/7791
Inventor 王友法徐媛媛赵书文夏冬林
Owner WUHAN UNIV OF TECH
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