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Single-layer fluorene conjugated polymer film based on polydopamine modified inorganic substrate as well as preparation method and application of single-layer fluorene conjugated polymer film

A technology of conjugated polymer and polydopamine, which is applied to coatings, instruments, analytical materials, etc., can solve the problems of reducing detection sensitivity, reducing the fluorescence intensity of membrane materials, etc., and achieve the effect of simple steps.

Active Publication Date: 2016-03-16
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art, and provides a single-layer fluorene-based conjugated polymer film based on a polydopamine-modified inorganic substrate and its preparation method and application, in order to solve the problem that the inorganic substrate will reduce the film material. Fluorescence intensity reduces detection sensitivity

Method used

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  • Single-layer fluorene conjugated polymer film based on polydopamine modified inorganic substrate as well as preparation method and application of single-layer fluorene conjugated polymer film
  • Single-layer fluorene conjugated polymer film based on polydopamine modified inorganic substrate as well as preparation method and application of single-layer fluorene conjugated polymer film
  • Single-layer fluorene conjugated polymer film based on polydopamine modified inorganic substrate as well as preparation method and application of single-layer fluorene conjugated polymer film

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Polydopamine modified inorganic substrate:

[0034] Cut the silicon wafer into a size of 2.5×1.3 cm, ultrasonically wash it with acetone, methanol and water for 15 min, then wash it with 5% HF acid solution for 5 min, wash it with a large amount of water, and dry it at 100°C for 1 h.

[0035] Dissolve 2mg of dopamine in 10mL Tris-HCl (pH8) buffer solution, then insert a 2.5×1.3cm silicon wafer substrate vertically into the solution, let it stand at room temperature for 24h, take it out, wash it repeatedly with water and ethanol, and 2 blow dry.

[0036] 25mg of p-iodobenzoyl chloride was dissolved in 10mL of anhydrous toluene, and then placed into the obtained silicon wafer substrate, N 2 React under protection for 12h, take out the substrate, wash with ethanol, N 2 Blow dry to obtain a polydopamine-modified silicon wafer substrate. The thickness of polydopamine is 5nm.

Embodiment 2

[0038] Polydopamine modified inorganic substrate:

[0039] Cut the glass piece into a size of 2.0×1.5 cm, wash it with acetone, methanol, and water for 15 min, then wash it with 5% HF acid solution for 5 min, wash it with a large amount of water, and dry it at 100°C for 1 h.

[0040] Dissolve 8 mg of dopamine in 10 mL of Tris-HCl (pH9) buffer solution, then insert a 2.0×1.5 cm glass substrate vertically into the solution, let it stand at room temperature for 48 hours, take it out, wash it repeatedly with water and ethanol, and2 blow dry.

[0041] 40mg of p-iodobenzoyl chloride was dissolved in 10mL of anhydrous toluene, and then inserted into the gained glass substrate, N 2 React for 8h under protection, take out the substrate, wash with ethanol, N 2 Blow dry to obtain polydopamine-modified glass substrate. The thickness of polydopamine is 75nm.

Embodiment 3

[0043] The preparation process of single-layer fluorene conjugated polymer film based on polydopamine modified inorganic substrate is as follows: figure 2 As shown, the specific steps are:

[0044] 2,7-di(ethynyl)-9,9-didecylfluorene (0.2mmol), 2,4-dibromobenzothiophene (0.2mmol), Pd(PPh 3 ) 4 (0.002mmol), cocatalyst CuI (0.002mmol) and polydopamine-modified silicon wafer substrates dispersed in 10mL toluene, in N 2 Under protection, add 5mLK 2 CO 3 Aqueous solution (containing 0.04mmolK 2 CO 3 ), at N 2 Protected and reacted at 80°C for 48h. Cool to room temperature, remove the substrate, wash with toluene and ethanol, N 2 Blow dry to obtain a single-layer fluorene-based conjugated polymer film based on polydopamine-modified inorganic substrate.

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Abstract

The invention provides a single-layer fluorene conjugated polymer based on a polydopamine modified inorganic substrate, a preparation method of the single-layer fluorene conjugated polymer and an application of the single-layer fluorene conjugated polymer to detection of aromatic explosives. Polydopamine with nano thickness is self-assembled on the surface of an inorganic substrate such as a silicon chip, glass or quartz, a large quantity of active functional groups are introduced to the substrate surface, and then the modified substrate surface is modified by an iodophenyl functional group; the substrate is placed into a fluorene polymer preparation solution, and the substrate surface is directly modified by the fluorene polymer. By the aid of stable adhesion of the polydopamine layer on the inorganic substrate and rich active functional groups on the surface, the modification density of the fluorene polymer on the surface of the inorganic substrate is improved remarkably. The single-layer fluorene conjugated polymer film material prepared with the method has good detection sensitivity on 1,3,5-TNT (trinitrotoluene), 2,4-DNT (dinitrotoluene) and 1,3,5-trinitrophenol.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of detection of aromatic hydrocarbon explosives, more specifically, the embodiments of the present invention relate to a single-layer fluorene-based conjugated polymer film based on a polydopamine-modified inorganic substrate and its preparation method and application. Background technique [0002] Aromatic explosives represented by 2,4-dinitrotoluene (DNT), 1,3,5-trinitrotoluene (TNT) and 1,3,5-trinitrophenol (PA) (its structure Such as figure 1 (shown) is the first choice for terrorists to create explosions, and the rapid detection of such compounds is of great significance for the early warning and investigation of terrorist explosions. Detection of the vapor of these compounds in air by fluorescence quenching is one of the most sensitive methods for rapid detection of aromatic hydrocarbon explosives. At present, fluorescent materials commonly used in fluorescence quenching mai...

Claims

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Application Information

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IPC IPC(8): C03C17/28G01N21/64
CPCC03C17/28C03C2218/111C03C2218/31G01N21/643G01N2021/6432
Inventor 赵川德范桂娟王晓川刘小乐于谦
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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