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Iridium complex organic fluorescent nanoparticles and preparation method thereof

An iridium complex, fluorescent nanotechnology, applied in nanotechnology, organic chemistry, nanotechnology and other directions, can solve the problem of less research on phosphorescent heavy metal complexes

Inactive Publication Date: 2014-03-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as phosphorescent materials with superior performance, there are relatively few studies on phosphorescent heavy metal complexes in organic fluorescent nanomaterials.

Method used

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  • Iridium complex organic fluorescent nanoparticles and preparation method thereof
  • Iridium complex organic fluorescent nanoparticles and preparation method thereof
  • Iridium complex organic fluorescent nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of dichloro bridge (dfppy) 2 Ir(μ-Cl) 2 (dfppy) 2 : Under nitrogen protection, take IrCl with a molar ratio of 2:5 3 ·3H 2 O and dfppy, add a mixed solvent of 2-ethoxyethanol and water with a volume ratio of 3:1, heat the above mixed solution to 110° C., stir for 24 hours, cool, filter, and wash.

[0025] (2) preparation (dfppy) 2 Ir(μ-Cl) 2 (dfppy) 2 PEO-b-P4VP: dichloro bridge of iridium complex (dfppy) 2 Ir(μ-Cl) 2 (dfppy) 2 The molar ratio to PEO-b-P4VP is 12:1; the concentration of the dichloro bridge of the iridium complex in DMF is 4.5mmol / L; after stirring overnight, dialyze with deionized water for one day.

[0026] The results of this example are as figure 1 As shown by the FESEM electron microscope, all of them are spherical in shape with a size of 50-100nm.

[0027] figure 2 It is the TEM electron microscope result of this embodiment.

Embodiment 2

[0029] (1) Preparation of dichloro bridge (ppy) 2 Ir(μ-Cl) 2 (ppy) 2 : Under nitrogen protection, take IrCl with a molar ratio of 1:3 3 ·3H 2 O and polypyrrole, add a mixed solvent of 2-ethoxyethanol and water with a volume ratio of 3:1, heat the above mixed solution to 110°C, stir for 24 hours, cool, filter, and wash.

[0030] (2) preparation (ppy) 2 Ir(μ-Cl) 2 (ppy) 2 PEO-b-P4VP:

[0031] Dichloro Bridge of Iridium Complexes (ppy) 2 Ir(μ-Cl) 2 (ppy) 2 The molar ratio to PEO-b-P4VP is 12:1; the concentration of the dichloro bridge of the iridium complex in DMF is 4.5mmol / L; after stirring overnight, dialyze with deionized water for one day.

[0032] The FESEM electron microscope figure of the product obtained in this embodiment is as follows image 3 As shown, most of them are spherical in shape with a size of 50-100nm.

[0033] Figure 4 It is the TEM electron microscope result of this embodiment.

Embodiment 3

[0035] (1) Preparation of dichloro bridge (pq) 2 Ir(μ-Cl) 2 (pq) 2 : Under nitrogen protection, take IrCl with a molar ratio of 1:3 3 ·3H 2 O and pq, add a mixed solvent of 2-ethoxyethanol and water with a volume ratio of 3:1, heat the above mixed solution to 110°C, stir for 24 hours, cool, filter, and wash.

[0036] (2) Preparation (pq) 2 Ir(μ-Cl) 2 (pq) 2 PEO-b-P4VP: dichloro bridge of iridium complex (pq) 2 Ir(μ-Cl) 2 (pq) 2 The molar ratio to PEO-b-P4VP is 12:1; the concentration of the dichloro bridge of the iridium complex in DMSO is 4.5mmol / L; after stirring overnight, dialyze with deionized water for one day.

[0037] The FESEM electron microscope figure of the product obtained in this embodiment is as follows Figure 5 As shown, most of them are spherical in shape with a size of 100-150 nm.

[0038] Figure 6 It is the TEM electron microscope result of this embodiment.

[0039] The fluorescence spectrum of the iridium complex organic fluorescent nanoparti...

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Abstract

The invention discloses a kind of iridium complex organic fluorescent nanoparticles and a preparation method thereof. The structural formula of the iridium complex organic fluorescent nanoparticles is R2Ir(Mu-Cl)2R2@PEO-b-P4VP, wherein R2Ir(Mu-Cl)2R2 is dichloro-bridged, R is dfppy, ppy or pq, PEO-b-P4VP is polyglycol-b-poly(4-vinylpyridine), the iridium complex organic fluorescent nanoparticles have a spherical morphology, and the grain size is 50nm to 150nm. The nanoparticles have excellent luminescent properties, can emit fluorescent light from blue light to red light and have significant potential application value in the field of luminescent organic nanomaterials; the preparation method of the iridium complex organic fluorescent nanoparticles has the advantages of simpleness in operation, mild conditions, low equipment requirement, no pollution and the like.

Description

technical field [0001] The invention relates to the field of organic nanometer materials, in particular to a class of iridium complex organic fluorescent nanoparticles and a preparation method thereof. Background technique [0002] Due to the small size of nanoparticles, they are equivalent to biological macromolecules, such as enzymes, polynucleotides, antibodies, etc. Moreover, compared with cells, the size is reduced by 100 to 10,000 times, so these nanoparticles can enter cells and interact with biomolecules on the surface or inside of cells, which provides a great opportunity for early detection, accurate diagnosis and specific research of diseases. Therapeutics offer a platform for potential applications. At present, nanoparticles are mainly used in drug and gene delivery, biosensing, and bioimaging in the biological field. [0003] In the field of photochemistry, phosphorescent heavy metal complexes such as iridium, platinum, rhenium, ruthenium, and osmium complexes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C07F15/00B82Y40/00B82Y30/00
Inventor 周治国秦丽洁卢阳薛峰峰杨红杨仕平
Owner SHANGHAI NORMAL UNIVERSITY
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