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Preparation method and application of supermolecule composite nano particles

A technology of supramolecular composites and nanoparticles, applied in the field of organic light-emitting materials, can solve problems such as poor processing performance, achieve the effects of easy processing, simple preparation methods, and reduced non-radiative transitions

Active Publication Date: 2012-10-03
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, small molecules generally have poor processability as materials

Method used

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  • Preparation method and application of supermolecule composite nano particles
  • Preparation method and application of supermolecule composite nano particles
  • Preparation method and application of supermolecule composite nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] A preparation method of supramolecular composite nanoparticles, comprising the following steps:

[0104] 1) Dissolve G4 PAMAM dendrimers and TPE-4-COOH in methanol respectively, and prepare them at a concentration of 1×10 -4 M and 1×10 -3 M solution;

[0105] 2) Dissolve TPE-4-COOH (50 μL) and different volumes of G4 PAMAM dendrimers in 10 ml of methanol, keeping the concentration of TPE-4-COOH at 5×10 -6 M, amino / carboxyl molar ratios are: 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1.0, 1.5, 2, 4, 6, 8, 10, 12, 14, 15, 16, 17, 18, 20, 24;

[0106] 3) Ultrasonic for 1 hour, after standing still, methanol solutions of supramolecular complex nanoparticles were obtained respectively, and their fluorescence emission spectra were tested.

[0107] Figure 7 It is the fluorescence intensity figure (excitation wavelength is 350nm) of the methanol solution of the supramolecular composite nanoparticle adopting different amino / carboxyl molar ratios of embodiment 1 at 462nm, and the up...

Embodiment 2

[0112] A preparation method of supramolecular composite nanoparticles, comprising the following steps:

[0113] Same as Example 1, the difference is that in step 2), the concentration of the amino functional group is kept at 3.2×10 -4 M, while controlling the concentration of carboxyl groups at 1×10 -6 M~1×10 -4 M, carboxyl / amino molar ratios are 0.06, 0.31, 0.63, 1, 1.25, 1.56, 1.88, 2.19, ultrasonic for 0.5 hours, methanol solutions of supramolecular composite nanoparticles with different composition ratios can be obtained.

[0114] Figure 11 It is the change diagram of the fluorescence intensity at 462nm of the methanol solution of supramolecular composite nanoparticles with different carboxyl / amino molar ratios in Example 2 (excitation wavelength is 350nm). When the carboxyl / amino group molar ratio is 1, the fluorescence enhancement of the obtained supramolecular composite nanoparticles is the largest.

[0115] Figure 12 It is the SEM picture of the supramolecular c...

Embodiment 3

[0118] A preparation method of supramolecular composite nanoparticles, comprising the following steps:

[0119] 1) Dissolve G10, G7, G4, G1 PAMAM dendritic polymers and TPE-4-COOH in ethanol, respectively, and prepare them at a concentration of 1×10 -5 M and 1×10 -3 M solution;

[0120] 2) Dissolve TPE-4-COOH (50 μL) and different volumes of G10, G7, G4, G1 PAMAM dendrimers in 10 ml of ethanol, keeping the concentration of TPE-4-COOH at 1×10 -5 M, the amino / carboxyl ratio is 1;

[0121] 3) Sonicate for 2 hours and let stand to obtain a stable ethanol solution of supramolecular complex nanoparticles emitting blue fluorescence.

[0122] Figure 14 It is the fluorescence emission spectrogram (excitation wavelength is 350nm) of the supramolecular complex nanoparticle ethanol solution of embodiment 3. Compared with the TPE-4-COOH solution, the fluorescence intensity at 462nm of the supramolecular complex nanoparticles formed by G10, G7, G4, and G1 PAMAM dendrimers and TPE-4-CO...

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Abstract

The invention discloses a preparation method of supermolecule composite nano particles. The method comprises the following steps of: dissolving TPE-m-COOH in an organic solvent to obtain a TPE-m-COOH solution; and mixing dendronized polymer Gn PAMAM and the TPE-m-COOH solution in the organic solvent, keeping the concentration of the TPE-m-COOH solution 1*10<-6> to 1*10<-4>M, wherein the molar ratio of amino of Gn PAMAM to carboxyl of TPE-m-COOH is definite, dispersing and standing to obtain the supermolecule composite nano particles. The supermolecule composite nano particles are strong in fluorescence emission performance; compared with tetraphenylethenes derivatives, the supermolecule composite nano particles have the advantages that fluorescence intensity is greatly enhanced, and the supermolecule composite nano particles can be used as novel luminescent materials; the preparation method is simple and mild in condition; and the supermolecule composite nano particles are easy to prepare.

Description

technical field [0001] The invention relates to a preparation method and application of supramolecular composite nanoparticles, belonging to the field of organic light-emitting materials. Background technique [0002] Organic light-emitting compounds have a wide range of applications in organic electroluminescent devices, fluorescent chemical sensors, cell imaging, biomarkers and other fields. However, most organic light-emitting compounds have a fluorescence concentration quenching effect, and their fluorescence quantum yields decrease at high concentrations or in the solid state, and even the fluorescence is completely quenched. This fluorescence concentration quenching effect limits the application of organic light-emitting compounds (Chen, C.T.; Chem. Mater. 2004, 16, 4389-4400.). People suppress the concentration quenching effect of organic light-emitting compounds by doping and modifying chromophores. However, due to the low doping concentration, there are usually di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K5/092C08K5/09C09K11/06
Inventor 李嫕张读山曾毅李鹏陈金平李迎迎
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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