Electroactive fluorescent polymer, preparation method and use for detecting oxidizing or reducing substance
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A fluorescent polymer and electroactive technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve the problems of limited types of detection objects, pollution, and inability to reuse
Inactive Publication Date: 2012-07-25
JILIN UNIV
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Problems solved by technology
However, fluorescent sensors designed based on the principle of host-guest interaction generally have some problems: first, poor reproducibility, mainly due to the irreversible interaction between the recognition element and the analyte, or the recognition element being contaminated by the analyte, which leads to The recognition ability of the fluorescent sensor is reduced, the sensitivity is reduced, and it cannot be reused; secondly, the types of detection objects are limited. Molecules are difficult to detect
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Embodiment 1
[0043] Add 0.9691g (5.015mmol) of 2-aminoanthracene and 2mL of triethylamine into 15mL of tetrahydrofuran, then dissolve 0.8828g (5mmol) of 2,6-difluorobenzoyl chloride in 15mL of tetrahydrofuran, dropwise within 2 hours Add to the above solution system, stir rapidly; after the dropwise addition, continue to react under nitrogen protection for 2 hours, filter with suction, wash the obtained precipitate with dichloromethane to obtain N1 monomer, and then dry it in a vacuum oven at 45°C for 24 hours. The yield was 91%.
Embodiment 2
[0045] Add 0.9089g (5.015mmol) of 2-aminofluorene and 2mL of triethylamine into 15mL of tetrahydrofuran, then dissolve 0.8828g (5mmol) of 2,6-difluorobenzoyl chloride in 15mL of tetrahydrofuran, dropwise within 2 hours Add to the above solution system, stir quickly; after the dropwise addition, continue to react for 2 hours under the protection of nitrogen, filter with suction, wash the obtained precipitate with dichloromethane to obtain N2 monomer, and then dry it in a vacuum oven at 45°C for 24h. The yield was 89%.
Embodiment 3
[0047] Difluoromonomer M (1.520g, 3mmol) and bisfluoromonomer N1 (1.041g, 3mmol), bisphenol A (1.370g, 6mmol) were added to a 100mL three- In the neck flask, add 20mL N-methylpyrrolidone (NMP), 10mL toluene, 0.8354g (6.018mmol) anhydrous potassium carbonate, N 2 Protected, heated to 165°C toluene and refluxed water for 2 hours, then distilled the toluene, increased the temperature to 190°C and continued the reaction for 8 hours, stopped heating, and cooled to room temperature. Discharge in 200mL distilled water, and obtain precipitate after filtration. Washed three times each with distilled water and absolute ethanol, and dried under vacuum for 48 hours to obtain a blue-gray powder solid C 1 (PAE-p-OA), yield 87%. The number average molecular weight of the polymer was 33800 (where 15
[0048] Polymer C 1 Dubbed two parts with a concentration of 1.0×10 -5 M of DMAc (containing 3vol% H 2 O) solution, and then ...
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Abstract
The invention belongs to the field of a functional high molecular material, and particularly relates to a series of side chain type electroactive fluorescent polymers, a preparation method and use for detecting an oxidizing or reducing substance. Fluorescence detection of the oxidizing or reducing substance is realized by utilizing the characteristic that the fluorescence intensity of the electroactive fluorescent polymer reversibly changes along with an oxidation reduction state of an aniline chain segment. The preparation method comprises the following steps of: synthesizing the fluorescentpolymer containing the aniline chain segment and a fluorescent group on a side chain through a ternary polymerization method; after preparing polymer into solution, keeping the aniline chain segment in the polymer in a reducing state or intermediate oxidizing state by using a chemical oxidation reduction method or electrochemical method; and then testing a fluorescence response situation of the aniline chain segment to the oxidizing or reducing substance by using a fluorescent spectrometer. The detection method has the advantages of wide variety of detection objects, high stability, low detection lower limit, reusability and the like, and has extremely broad application prospect in the fields of biology, chemistry, foods, environment and the like.
Description
technical field [0001] The invention belongs to the field of functional polymer materials, and specifically relates to a series of side chain type electroactive fluorescent polymers, a preparation method and a method for detecting oxidized or reduced substances. technical background [0002] Since the 1990s, the synthesis and properties of organic polymer light-emitting materials have aroused the interest of many researchers, and have been widely used in the research of photoelectric conversion and electroluminescence. At the same time, with the rapid development of supramolecular chemistry and coordination chemistry, the study of designing new sensors using fluorescent functional polymers to realize molecular / ion recognition has attracted extensive attention. [0003] The research work of traditional polymer fluorescent sensors is mostly designed based on the principle of host-guest interaction, and the detection objects are mainly ions in solution, biological macromolecule...
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