Eu<3+> and rhodamine 6G doped polymer fluorescent encoding microsphere and preparation method

A fluorescent encoding and polymer technology, applied in the field of luminescent materials, can solve the problems of cumbersome experimental conditions, uneven particle size of silicon spheres, and limited application range

Inactive Publication Date: 2014-05-14
SUZHOU UNIV
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Problems solved by technology

literature( Colloids and Surfaces A: Physicochem. Eng. Aspects 326 (2008) 109–114) reported doping europium ions onto inorganic silicon spheres to obtain europium-doped inorganic fluorescent silicon spheres. This method simply doped a fluorescent substance onto inorganic silicon spheres to obtain A fluorescent microsphere emitting fluorescence, and the particle size of the silicon sphere obtained is not uniform
literature( J. Mater. Chem. , 2010, 20, 1179–1185) reported that rhodamine 6G was doped onto polystyrene microspheres to obtain rhodamine 6G doped fluorescent microspheres, and a series of different rhodamine 6G Fluorescence-coded microspheres with fluorescence emission intensi

Method used

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  • Eu&lt;3+&gt; and rhodamine 6G doped polymer fluorescent encoding microsphere and preparation method
  • Eu&lt;3+&gt; and rhodamine 6G doped polymer fluorescent encoding microsphere and preparation method
  • Eu&lt;3+&gt; and rhodamine 6G doped polymer fluorescent encoding microsphere and preparation method

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Embodiment 1

[0020] This embodiment provides polymer fluorescent coded microspheres doped with europium ions, see attached figure 1 , which is a schematic diagram of the principle of the present invention to prepare fluorescently encoded microspheres doped with europium ions and rhodamine 6G, wherein, I 1 is the fluorescence emission intensity of PSDVB microspheres, I 2 is the fluorescence emission intensity of rhodamine 6G, I 3 is the fluorescence emission intensity of europium ions, and R6G is rhodamine 6G. Its preparation steps are as follows:

[0021] 1. Preparation of Eu 3+ the solution

[0022] 0.0352g of Eu 2 o 3 Dissolve in 1mL CH 3 In COOH, make a 100mL solution with deionized water, heat and shake to dissolve, and obtain colorless and transparent Eu 3+ solution.

[0023] 2. Preparation of polymer fluorescently encoded microspheres doped with europium ions

[0024] Add isopropanol: deionized water = 1:1 solvent 40mL, Eu 3+ Solution (M Eu =20 μmol), PSDVB microspheres ...

Embodiment 2

[0029] 1. Preparation of Eu 3+ the solution

[0030] 0.0352g of Eu 2 o 3 Dissolve in 1mL CH 3 In COOH, make a 100mL solution with deionized water, heat and shake to dissolve, and obtain colorless and transparent Eu 3+ solution.

[0031] 2. Preparation of polymer fluorescently encoded microspheres doped with europium ions

[0032] Add isopropanol: deionized water = 1:1 solvent 40mL, Eu 3+ Solution (M Eu=20 μmol), PSDVB microspheres 75㎎ (provided by Suzhou Nan Microbe Technology Co., Ltd.), polyvinylpyrrolidone (PVP) 60㎎, put into a high-temperature shaking incubator (set at 80°C, 220 rpm), and react at a constant temperature of 80°C 3 hours. After the reaction, the mixture was centrifuged (2000 rpm), and then the microspheres were washed three times with deionized water (shock first: 1000 rpm, then centrifuge: 2000 rpm, remove the supernatant, and then deionized water repeated shaking and centrifugation), and then freeze-dried to obtain polymer fluorescent-encoded micr...

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Abstract

The invention relates to a Eu<3+> and rhodamine 6G doped polymer fluorescent encoding microsphere and a preparation method. The preparation method comprises the steps of dispersing a surface sulfonic polystyrene-divinyl benzene cross-linked microsphere in a mixed solvent, adding a Eu<3+> solution to obtain a Eu<3+> doped polymer fluorescent encoding microsphere, evenly dispersing the Eu<3+> doped polymer fluorescent encoding microsphere in the deionized water solution of CH3COOH and (NH4)2S2O8, adding rhodamine 6G, and carrying out shaking, centrifugal washing and freeze drying to obtain the Eu<3+> and rhodamine 6G doped polymer fluorescent encoding microsphere. After the prepared fluorescent encoding microsphere is motivated, three fluorescent emissions can be obtained; and through changing the addition of europium or rhodamine 6G, a series of fluorescent encoding microspheres with different fluorescent emission strength ratios can be prepared and can be applied to the fields of biological detection, medical diagnosis and the like.

Description

technical field [0001] The present invention relates to a polymer fluorescent coded microsphere and its preparation method, in particular to doping with different amounts of europium ions or rhodamine 6G to obtain a series of polystyrene with different europium ions, rhodamine 6G and surface sulfonate - The invention relates to a fluorescent coded microsphere with a fluorescence emission intensity ratio of a divinylbenzene cross-linked (PSDVB) microsphere, which belongs to the technical field of luminescent materials. Background technique [0002] Europium has a unique luminescent property. After being excited, it can emit a rich fluorescence spectrum, and can emit electromagnetic radiation of various wavelengths from ultraviolet to infrared. The typical red fluorescence around 611nm has been developed as a variety of important luminescent materials. . Rhodamine 6G is a kind of rhodamine fluorescent dye, which has the advantages of good photostability, insensitivity to pH, ...

Claims

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Application Information

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IPC IPC(8): C09K11/06
Inventor 范丽娟邵亚张伟
Owner SUZHOU UNIV
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