Fluorescence conjugated polyelectrolytes with amphoteric side chain, preparation method and application

A technology of conjugated polyelectrolytes and side chains, which is applied in the field of fluorescent chemical sensing materials, can solve problems such as difficulties in storage and transportation, affecting luminescent performance and sensing efficiency, and reducing the efficiency of conjugated high molecular weight molecules, so as to achieve convenient storage and transport effect

Inactive Publication Date: 2010-11-24
SUZHOU UNIV
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Problems solved by technology

These conjugated polyelectrolytes mainly exist in the form of aggregation in the water environment, which strengthens the electron and energy transfer between molecules, thus affecting its luminescence performance and sensing efficiency.
Due to the strong π-π* interaction between the conjugated main chains, it is difficult to destroy the π-π* interaction an

Method used

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  • Fluorescence conjugated polyelectrolytes with amphoteric side chain, preparation method and application
  • Fluorescence conjugated polyelectrolytes with amphoteric side chain, preparation method and application
  • Fluorescence conjugated polyelectrolytes with amphoteric side chain, preparation method and application

Examples

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Embodiment 1

[0029] The oil-soluble monomer used in this example is 1,4-diethynyl-2,5-docosyloxybenzene; the water-soluble monomer used is 1,4-diiodo-2,5-dipropane Benzene oxysulfonate.

[0030] (1) The synthesis steps of 1,4-diethynyl-2,5-docosyloxybenzene are as follows:

[0031] Preparation of 1,4-docosyloxybenzene

[0032] A DMF solution containing hydroquinone (11 g, 100 mmol) and dodecane bromide (2.2 equivalents) was placed in a 500 ml single-necked flask equipped with a condenser, and potassium hydroxide (250 mmol) was added thereto. The mixed solution was stirred and slowly heated to 120° C., and stirred and refluxed after the reaction was stable. After finishing the reaction, the reaction solution was cooled to room temperature, and the solid precipitate was collected by suction filtration. The collected solid was recrystallized with ethanol to obtain a white solid, which was dried in a vacuum oven to obtain the pure product 1,4-docosyloxy phenyl (85% yield).

[0033] Preparati...

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Abstract

The invention discloses a fluorescence conjugated polyelectrolytes and a preparation technology thereof, in particular to a fluorescence conjugated polyelectrolytes with an amphoteric side chain and a preparation method thereof, which is applied to the field of fluorescent chemical sensing materials. The structure of the fluorescence conjugated polyelectrolytes with the amphoteric side chain contains an OCnH2n+1 oleophylic side chain and an ionic type oleophylic side chain simultaneously, wherein the ionic type oleophylic side chain contains ammonium salt or sulphonate. The fluorescence conjugated polyelectrolytes with the amphoteric side chain is prepared by comprising the following steps: mixing oil-soluble monomers and water-soluble monomers in molar ratio of 1-1.12:1, adding catalyst tetrakis-(triphenylphosphine)-palladium and cuprous iodide, and carrying out coupling reaction, wherein the ratio of the catalyst tetrakis-(triphenylphosphine)-palladium to the oil-soluble monomers is 1:0.0.5-0.08, and the ratio of the cuprous iodide to the oil-soluble monomers is 1:0.05-0.08. The substance has different fluorescence luminous performance in the mixed solvent of the water and organic solvent in different proportion and has sensing response for a specific substance, thereby serving as a high-sensitive sensing system in the mixed solvent of the water and the organic solvent and having an application prospect.

Description

technical field [0001] The invention relates to a fluorescent conjugated polymer and its preparation technology, in particular to a fluorescent conjugated polyelectrolyte containing amphoteric side chains, its preparation and application, and belongs to the field of fluorescent chemical sensing materials. Background technique [0002] In terms of fluorescent sensing materials, fluorescent small molecules have been widely studied as chemical sensors in the past few decades. Compared with small molecular materials, polymer materials have many advantages, such as the strength, stability, and structural adjustability of materials. In practical applications, the small molecule sensing material should eventually be embedded in the polymer matrix, or the small molecule fluorophore and sensing receptors should be introduced into the polymer side chain, and the polymer main chain mainly acts as a scaffold. [0003] Conjugated polymers are sometimes called conductive polymers or molec...

Claims

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Application Information

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IPC IPC(8): C09K11/06C08G61/02G01N21/64
Inventor 范丽娟沈德志姚敏德王丽莎程丝
Owner SUZHOU UNIV
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