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Preparation method of cluster-induced high-fluorescence non-conjugated polymer

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

Active Publication Date: 2021-03-19
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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  • Preparation method of cluster-induced high-fluorescence non-conjugated polymer
  • Preparation method of cluster-induced high-fluorescence non-conjugated polymer
  • Preparation method of cluster-induced high-fluorescence non-conjugated polymer

Examples

Experimental program
Comparison scheme
Effect test

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 times

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

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 preparation method of a cluster-induced high-fluorescence non-conjugated polymer, and belongs to the technical field of fluorescent polymer materials. The preparation method of the high-fluorescence non-conjugated polymer comprises the steps of firstly, preparing a polyvinylpyrrolidone solution; secondly, mixing a polyvinylpyrrolidone solution with an ascorbic acid solution, and reacting for 2-12 hours at the temperature of 0-100 DEG C to obtain a product solution (PVP-A PDs); and finally, mixing the PVP-A PDs solution with 5-30mM of m-phenylenediamine solution, and reacting for 1-5 hours at the temperature of 0-80 DEG C so as to obtain a product solution (PVP-A PDs@MPD). The fluorescence quantum yield of the obtained non-conjugated polymer is as high as 46.9%; compared with a fluorescent conjugated polymer, the preparation method has the characteristics of simple preparation steps, environmental friendliness and the like, overcomes the aggregation-induced fluorescence quenching effect of the fluorescent conjugated polymer, and has the characteristic of cluster-induced emission.

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 Applications(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