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Preparation method of strong-polarity organic solvent tolerance macroscopic blue-phase polydiyne material based on co-assembly way

An organic solvent and polar organic technology, which is applied in the field of preparation of macroscopic blue-phase polydiacetylene materials with strong polar organic solvent tolerance, can solve problems such as difficult sensors, difficult polymerization diacetylene materials, and restricted development, and achieves easy polymerization. , the method is simple, the side chain structure is easy to achieve

Active Publication Date: 2021-12-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of side chain covalent modification groups, it is difficult for this kind of polydiyne to exist stably in the blue phase in strong polar organic solvents (such as DMF), and it is even more difficult to directly form polydiyne materials with macroscopic dimensions.
In addition, since the discoloration behavior of polydiyne in strong polar organic solvents is generally irreversible, it is difficult for polydiyne materials to be used as sensors for other external stimulus response conditions (such as temperature and pH) in strong polar organic solvents, which greatly limits its development

Method used

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  • Preparation method of strong-polarity organic solvent tolerance macroscopic blue-phase polydiyne material based on co-assembly way
  • Preparation method of strong-polarity organic solvent tolerance macroscopic blue-phase polydiyne material based on co-assembly way
  • Preparation method of strong-polarity organic solvent tolerance macroscopic blue-phase polydiyne material based on co-assembly way

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: PCDA and NMA are slowly added dropwise in DMF to assemble

[0029] Prepare 1 mL of PCDA-DMF solution with a concentration of 20 mg / mL; prepare 1 mL of NMA-DMF solution with a concentration of 15 μL / mL. The PCDA-DMF solution was slowly added dropwise to the NMA-DMF solution at room temperature 25°C at a rate of 0.2 mL / h to obtain a macroscopic white co-assembly solution with a single co-assembly size greater than 1 mm. The white precipitate obtained from the assembly was polymerized under 365nm ultraviolet light irradiation for 3 minutes. In the field of view, it is obvious that the macroscopic white assembly completely changes into the macroscopic blue phase polydiyne material, indicating that the co-assembly unit is completely aggregated. The DMF solution of the gained macroscopic blue phase polydiyne was placed at room temperature for 12 months, and its color and ultraviolet absorption spectrum did not change significantly (see Figure 7 ).

Embodiment 2

[0030] Example 2: DPDA and NMA are slowly added dropwise in DMF to assemble

[0031] Prepare 1 mL of DPDA-DMF solution with a concentration of 20 mg / mL; prepare 1 mL of NMA-DMF solution with a concentration of 20 μL / mL. The DPDA-DMF solution was slowly added dropwise to the NMA-DMF solution at a room temperature of 25 °C at a rate of 0.2 mL / h to obtain a macroscopic white co-assembly solution with a single co-assembly size greater than 1 mm. The white precipitate obtained from the assembly was polymerized under 365nm ultraviolet light irradiation for 3 minutes. In the field of view, it is obvious that the white assembly is completely transformed into a blue phase polydiyne material. The DMF solution of gained blue phase polydiyne is placed 12 months at room temperature, and its color and ultraviolet absorption spectrum do not change significantly (see Figure 8 ).

Embodiment 3

[0032] Example 3: Sensing and color-changing performance test of macroscopic blue phase polydiyne

[0033] Prepare 1 mL of PCDA-ethanol solution with a concentration of 20 mg / mL; prepare 1 mL of NMA-ethanol solution with a concentration of 15 μL / mL. The PCDA-ethanol solution was slowly added dropwise to the NMA-ethanol solution at a normal temperature of 25° C. at a rate of 0.2 mL / h to obtain a macroscopic white assembly. The white precipitate obtained from the assembly was polymerized under 365nm ultraviolet light irradiation for 3 minutes. In the field of view, it is obvious that the macroscopic white assembly is aggregated to obtain the macroscopic blue phase polydiyne material. The above operation steps were repeated three times to obtain three sets of macroscopic blue phase polydiyne solutions. Add acid (HCl) and alkali (NaOH) to the three groups of solutions respectively or increase the temperature of the solution (50°C), the blue phase macroscopic polydiyne obviously ...

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Abstract

The invention belongs to the technical field of material preparation, and particularly discloses a preparation method of a strong-polarity organic solvent tolerance macroscopic blue-phase polydiyne material based on a co-assembly way. The preparation method comprises the following steps: firstly, respectively dissolving a diacetylenic acid monomer and NMA into a strong polar organic solvent, and then adding a diacetylenic acid solution into an NMA solution (the molar ratio of carboxyl in the diacetylenic acid monomer to amino in NMA is less than or equal to 1) to obtain a white co-assembly; wherein a diacetylenic acid co-assembly with the macroscopic size can be obtained by controlling the mixing speed; irradiating the co-assembly solution under 365 nm ultraviolet light, so that topological polymerization of diacetylenic acid can be achieved, and macroscopic blue-phase polydiyne stably existing in the solution is obtained. The macroscopic blue-phase polydiyne obtained by the invention overcomes the defects that a polydiyne material is in a red phase in a strong-polarity organic solvent system and generally cannot reversibly become a blue phase. The prepared material has a good application prospect in the fields of photoelectric devices, biological monitoring and sensing.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and specifically relates to a method for preparing a highly polar organic solvent-tolerant macroscopic blue phase polydiyne material based on a co-assembly approach. Background technique [0002] Polydiynes are a class of polymers with conjugated main chain structures. The presence of conjugated main chains endows polydiynes with unique optical and electrical properties. Typically, when polydiynes are subjected to external stimuli (such as temperature, pH changes, solvent polarity changes), color changes and the appearance or disappearance of fluorescent properties occur, allowing them to be studied as a sensing material. extensive attention of personnel. Compared with small molecule sensors, polydiacetylene sensors have significant advantages such as higher binding efficiency, stronger signal output, higher stability, and ease of use in device manufacturing, so they are widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F138/00C08F2/48
CPCC08F138/00C08F2/48
Inventor 马超群江力郭帅马硕蒋陈晶蒋必彪黄文艳
Owner CHANGZHOU UNIV
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