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A kind of preparation method of cluster-induced high fluorescence non-conjugated polymer

A non-conjugated polymer and solution mixing technology, applied in the field of preparation of cluster-induced high fluorescence non-conjugated polymers, can solve the problems of limited application, poor water solubility, low biocompatibility, etc., and achieve the goal of overcoming aggregation fluorescence quenching Off, the effect of simple steps

Active Publication Date: 2021-10-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the existence of large conjugated structures, they have poor water solubility and low biocompatibility; in addition, most fluorescent conjugated polymers have aggregation fluorescence quenching effect, which further limits their application.

Method used

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  • A kind of preparation method of cluster-induced high fluorescence non-conjugated polymer
  • A kind of preparation method of cluster-induced high fluorescence non-conjugated polymer
  • A kind of preparation method of cluster-induced high fluorescence non-conjugated polymer

Examples

Experimental program
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Embodiment 1～5

[0026] A method for preparing a cluster-induced highly fluorescent non-conjugated polymer, the method comprising the steps of:

[0027] (1) Prepare a 0.5-2.5 mM polyvinylpyrrolidone solution.

[0028] (2) Mix the polyvinylpyrrolidone solution obtained in step (1) with the ascorbic acid solution, and react at 60° C. for 8 hours to obtain a solution (PVP-A PDs); the molar ratio of the polyvinylpyrrolidone copper to ascorbic acid is 1:2.5.

[0029] (3) Mix the solution obtained in step (2) with 10 mM m-phenylenediamine solution, the molar ratio of ascorbic acid to m-phenylenediamine is 1:3.3, react at 25°C for 4 hours, dialyze the solution to obtain a non-conjugated fluorescent polymer ( PVP-A PDs@MPD);

[0030] Examples 1-5 are PVP-A PDs prepared under different concentrations of polyvinylpyrrolidone, see Table 1.

[0031] The maximum emission wavelength of PVP-A PDs prepared from polyvinylpyrrolidone and ascorbic acid was 424nm ( figure 1 ). PVP-A PDs transmission electron ...

Embodiment 6～11

[0036] A method for preparing a cluster-induced highly fluorescent non-conjugated polymer, the method comprising the steps of:

[0037] (1) Prepare a 1.25 mM polyvinylpyrrolidone solution.

[0038] (2) Mix the polyvinylpyrrolidone solution obtained in step (1) with the ascorbic acid solution, and react at 60° C. for 2 to 12 hours to obtain a solution (PVP-A PDs); the molar ratio of the polyvinylpyrrolidone copper to ascorbic acid is 1: 2.5;

[0039] (3) Mix the solution obtained in step (2) with 10 mM m-phenylenediamine solution, the molar ratio of ascorbic acid to m-phenylenediamine is 1:3.3, react at 25°C for 4 hours, dialyze the solution to obtain a non-conjugated fluorescent polymer ( PVP-A PDs@MPD);

[0040] Examples 6-11 are PVP-APDs prepared under different reaction times of polyvinylpyrrolidone and ascorbic acid, see Table 2.

[0041] Table 2 embodiment 6~11 different reaction time

[0042] Example 6 Example 7 Example 8 Example 9 Example 10 Ex...

Embodiment 12～17

[0044] A method for preparing a cluster-induced highly fluorescent non-conjugated polymer, the method comprising the steps of:

[0045] (1) Prepare 1.25mM polyvinylpyrrolidone solution;;

[0046] (2) Mix the polyvinylpyrrolidone solution obtained in step (1) with the ascorbic acid solution, and react at 0 to 100°C for 8h to obtain a solution (PVP-A PDs); the molar ratio of the polyvinylpyrrolidone copper to ascorbic acid is 1: 2.5.

[0047] (3) Mix the solution obtained in step (2) with 10 mM m-phenylenediamine solution, the molar ratio of ascorbic acid to m-phenylenediamine is 1:3.3, react at 25°C for 4 hours, dialyze the solution to obtain a non-conjugated fluorescent polymer ( PVP-A PDs@MPD);

[0048] Examples 12-17 are PVP-APDs prepared by polyvinylpyrrolidone and ascorbic acid at different reaction temperatures, see Table 3.

[0049] Table 3 embodiment 12~17 different reaction temperatures

[0050] Example 12 Example 13 Example 14 Example 15 Exampl...

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Abstract

The invention provides a method for preparing a cluster-induced high-fluorescence non-conjugated polymer, which belongs to the technical field of fluorescent polymer materials. The method for preparing the high-fluorescence non-conjugated polymer is as follows: firstly, a polyvinylpyrrolidone solution is prepared; Secondly, mix polyvinylpyrrolidone solution and ascorbic acid solution, and react at 0-100°C for 2-12 hours to obtain product solution (PVP-A PDs); finally, mix PVP-A PDs solution with 5-30mM m-phenylenediamine solution, React at 0-80°C for 1-5 hours to obtain a product solution (PVP‑A PDs@MPD). The fluorescence quantum yield of the non-conjugated polymer obtained in the present invention is as high as 46.9%. Compared with the fluorescent conjugated polymer, the preparation steps are simple, green and environmentally friendly, and it overcomes the fluorescence quenching effect induced by the aggregation of the fluorescent conjugated polymer, and has the advantages of Cluster-induced luminescent properties.

Description

technical field [0001] The invention relates to a method for preparing a cluster-induced high-fluorescence non-conjugated polymer. Background technique [0002] The invention belongs to the technical field of fluorescent polymer materials. Fluorescent conjugated polymers usually contain a large amount of aromatic compounds or have a large conjugated structure in the whole molecule, which makes them emit. However, due to the existence of large conjugated structures, they have poor water solubility and low biocompatibility; in addition, most fluorescent conjugated polymers have aggregation fluorescence quenching effect, which further limits their applications. Non-conjugated fluorescent polymers generally contain electron-rich heteroatoms, such as nitrogen (N), oxygen (O), sulfur (S), phosphorus (P), or unsaturated C=C and C≡N, etc., without large π-conjugated structure, these substances also have photoluminescence characteristics under certain conditions, and as the concentr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F26/10C09K11/06
CPCC08F8/32C09K11/06C09K2211/145C09K2211/1466C08F26/10
Inventor 韩冰雁燕琪芳李丹辛泽刘庆东雷翔善
Owner DALIAN UNIV OF TECH