Sensors and their applications, standard fluorescent cards

A sensor and fluorescence sensor technology, applied in the field of fluorescence sensing, can solve the problems of slow response speed of detection materials, inability to use gas phase detection, poor repeatability, etc., and achieve the effects of good electron transmission capability, strong rigidity, and improved solubility

Active Publication Date: 2021-01-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made, the development of good fluorescent probes for the detection of sarin gas still faces the following problems: (1) the response speed of the detection material is slow and the sensitivity is poor; (2) many fluorescent sensors It can only be used for liquid phase detection, and cannot be used for on-site real-time gas phase detection; (3) The repeatability is poor in both liquid phase and gas phase detection

Method used

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  • Sensors and their applications, standard fluorescent cards
  • Sensors and their applications, standard fluorescent cards
  • Sensors and their applications, standard fluorescent cards

Examples

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preparation example Construction

[0058] The present invention provides a preparation method for the fluorescent polymer described in the above scheme, comprising the following steps: performing a coupling reaction with the boronic acid corresponding to the structural unit A or the boric acid ester corresponding to the structural unit A with a compound having a structure shown in formula II, A fluorescent polymer having a structure shown in formula I is obtained;

[0059]

[0060] In the formula II, X is chlorine, bromine or iodine.

[0061] Unless otherwise specified, the raw materials used in the present invention are commercially available products well known in the art.

[0062] In the present invention, the boric acid ester corresponding to the structural unit A preferably has the structure shown in formula III:

[0063]

[0064] In the present invention, the structural formula of the boronic acid corresponding to the structural unit A is shown in formula IV:

[0065]

[0066] In the present in...

Embodiment 1

[0099] The preparation process of fluorescent polymer P1 is as follows:

[0100]

[0101] Specific steps include:

[0102] 150mg (0.24mmol) 1,2-two ((4-bromophenyl) chloromethylene) hydrazine, 142mg (0.24mmol) N-dodecyl-2,7-dioxaborocarbazole , 3mL of toluene, 2mL of potassium carbonate solution (concentration is 2M) and 1mL of absolute ethanol were mixed, under the protection of argon, the raw material mixture was frozen by liquid nitrogen for 8min, then vacuumized for 5min, and then 8.4mg of tetrakis(triphenylene) was added Phosphorus-based) palladium, repeat the above-mentioned freezing-vacuumizing operation three times, heat up to 100°C and reflux for 72h, after the reaction is completed, cool the resulting reaction solution to room temperature. The reaction solution was added dropwise into 200 mL of methanol, extracted by Soxhlet for 18 h and then dried to obtain the product with a calculated yield of 67%, which was designated as P1.

[0103] The obtained product P1 ...

Embodiment 2

[0107] The preparation process of fluorescent polymer P2 is as follows:

[0108]

[0109] Specific steps include:

[0110] 150mg (0.24mmol) of 1,2-bis((4-bromophenyl)chloromethylene)hydrazine, 142mg (0.24mmol) of 9,9 diethyl-2,7-dioxabororene, Mix 3mL of toluene, 2mL of potassium carbonate solution (concentration: 2M) and 1mL of absolute ethanol. Under the protection of argon, freeze the raw material mixture by liquid nitrogen for 8min, then vacuumize for 5min, and then add 8.4mg of tetrakis(triphenyl Phosphorus) palladium, repeat the above-mentioned freezing-vacuumizing operation three times, heat up to 100°C and reflux for 72h, after the reaction is completed, cool the resulting reaction solution to room temperature. The reaction solution was added dropwise into 200 mL of methanol, extracted by Soxhlet for 18 h and then dried to obtain the product with a calculated yield of 70%, which was designated as P2.

[0111] 1 H NMR (500MHz, CD 2 Cl 2 )δ8.24 (d, J = 7.4Hz, 4H)...

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Abstract

The invention relates to the technical field of fluorescence sensing, and concretely relates to a fluorescent polymer, a preparation method thereof, a sensor, an application of the sensor, and a standard fluorescent card. The molecular skeleton of the fluorescent polymer is composed of 4H-1,2,4-triazole (TAZ), electron-donating groups and a side chain. TAZ is used as a main light-emitting construction unit, and also serves as an electron acceptor group, a charge transfer state (CT) on a molecular main chain can be formed after the electron-donating groups such as carbazole and fluorene are introduced in order to construct the donor-acceptor type organic conjugated polymer material, and the degree of the CT can be effectively adjusted so as to regulate the emission wavelength in order to make the emission peak of the designed fluorescent polymer material located in a blue light region. After the fluorescent polymer is processed to produce the sensor, the sensor can realize efficient andrapid fluorescent, chromogenic or fluorescent / chromogenic dual-channel detection of liquid-phase and gas-phase trace sarin poisons and analogues thereof, and has the advantages of high response speed, high selectivity and sensitivity, and repeatability.

Description

technical field [0001] The invention relates to the technical field of fluorescent sensing, in particular to a fluorescent polymer, a preparation method thereof, a sensor and its application, and a standard fluorescent card. Background technique [0002] Nerve agents, such as Tabun, Sarin, Soman, and Viex (VX), are a class of highly toxic chemical substances that can disrupt the normal conduction function of the nervous system of living organisms. Because of its strong toxicity and quick action, it can be absorbed through the skin, mucous membranes, gastrointestinal tract and lungs to cause systemic poisoning. In addition, it is stable in nature, easy to produce, and has good performance. Therefore, it is often used as a chemical warfare agent on military battlefields. . Sarin is known as the "King of Poison Gas" and is a highly toxic and volatile liquid. Due to the Matsumoto sarin gas incident in Japan in 1994 and the subway sarin gas incident in Tokyo, Japan in 1995, sari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12G01N21/64C09K11/06
CPCC08G61/124C08G2261/124C08G2261/1412C08G2261/143C08G2261/3221C08G2261/3241C08G2261/411C08G2261/522C08G2261/94C09K11/06C09K2211/1416C09K2211/1466G01N21/6428G01N2021/6417G01N2021/6432
Inventor 张明郑平阿力木·阿卜杜热合曼
Owner JILIN UNIV
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