Fluorescent star polymer, and preparation method and application thereof

A star-shaped polymer and polymer technology, applied in the field of fluorescence detection, can solve the problem that the sensitivity of the fluorescence detection of explosives needs to be further improved, and achieve the effects of high sensitivity, fast response speed and good selectivity

Active Publication Date: 2020-08-25
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application is to solve the technical problem that the sensitivity of th

Method used

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  • Fluorescent star polymer, and preparation method and application thereof
  • Fluorescent star polymer, and preparation method and application thereof
  • Fluorescent star polymer, and preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0059] The second aspect of the present application provides a method for preparing the above-mentioned fluorescent star-shaped polymer, the method comprising the following steps:

[0060] Reaction of benzo[1,2-b:3,4-b':5,6-b”]trithiophene with butyllithium under anhydrous and oxygen-free conditions to obtain lithiated compounds;

[0061] Reaction of the lithiated compound with trimethyltin chloride or tributyltin chloride to obtain bistin-substituted benzo[1,2-b:3,4-b':5,6-b"]trithiophene ;

[0062] The bistin-substituted benzo[1,2-b:3,4-b':5,6-b"]trithiophene is used as the first polymerization precursor, and bromine-substituted alkylfluorene or bromine-substituted Alkyl carbazole is used as the second polymerization precursor; under anaerobic conditions, the first polymerization precursor and the second polymerization precursor are added to an organic solvent and mixed to obtain a mixed solution; in the mixed solution Adding a palladium catalyst, the mixed solution is sub...

Embodiment 1

[0072] Example 1: Synthesis of Polymer P1.

[0073] A preparation method for a fluorescent star-shaped polymer, the polymer P1 has the following general formula:

[0074]

[0075] The method comprises the following steps: mixing benzo[1,2-b:3,4-b':5,6-b"]trithiophene (5mmol) with butyl Lithium (15mmol) reacts to obtain lithiated compound;

[0076] Reaction of the lithiated compound with tributyltin chloride (16 mmol) affords 2,5,8-tris(trimethyltinyl)benzo[1,2-b:3,4-b':5,6-b "] Trithiophene, detected by NMR: 1HNMR (300MHz, d-DMSOppm): δ=0.26(s, 9H), 7.56(s, H).

[0077] Using 2,5,8-tris(trimethylstannyl)benzo[1,2-b:3,4-b':5,6-b"]trithiophene as the first polymeric precursor, 2,7 -Dibromo-9,9-dihexyl-9H-fluorene is used as the second polymerization precursor. Under the condition of anhydrous and oxygen-free, the polymerization precursor ① (0.1mmol) and the polymerization precursor ② (0.3mmol) are added into the container In the flask with toluene solvent (20ml), add tetr...

Embodiment 2

[0078] Example 2: Synthesis of Polymer P2.

[0079] A preparation method for a fluorescent star-shaped polymer, the polymer P2 has the following general formula:

[0080]

[0081] Its specific preparation process is as follows:

[0082] Benzo[1,2-b:3,4-b':5,6-b”]trithiophene (5mmol) was reacted with butyllithium (15mmol) under anhydrous and oxygen-free conditions at -78°C , to obtain lithium compounds;

[0083] Reaction of the lithiated compound with tributyltin chloride (16mmol) gave 2,5,8-tris(trimethyltin-based)benzo[1,2-b:3,4-b':5,6- b"] trithiophene;

[0084] Using 2,5,8-tris(trimethylstannyl)benzo[1,2-b:3,4-b':5,6-b”]trithiophene as the polymerization precursor ①, 2,7- Dibromo-9,9-dioctyl-9H-fluorene was used as the polymerization precursor ②, under the condition of anhydrous and oxygen-free, the polymerization precursor ① (0.1mmol) and the polymerization precursor ② (0.3mmol) were added into the Add palladium acetate (0.01mmol) to a flask of toluene solvent (20m...

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Abstract

The invention provides a fluorescent star polymer, and a preparation method and application thereof. The structural formula of a repeating unit of the polymer is shown in a formula I or a formula II,wherein the structural formulas of the formula I and the formula II are as shown in the specification. In the formula I, R and R' are both alkyl groups, and the number of carbon atoms in each of R andR ' is 6-14; and in the formula II, R is an alkyl group, and the number of carbon atoms in R is 6-14. The polymer is a two-dimensional polymer net structure with benzo[1,2-b: 3, 4-b': 5, 6-b'']trithiophene (TTB) and fluorene or carbazole as structural units, is high in response speed, good in selectivity and high in sensitivity, can provide beneficial help for a chemical explosive fluorescence detection technology, and can also be applied to the fields of light emitting diodes, biological imaging, sensors and the like.

Description

technical field [0001] The present application relates to the technical field of fluorescence detection, in particular to a fluorescent star polymer and its preparation method and application. Background technique [0002] The adverse effects of explosives on national defense security, ecological environment and human health have aroused widespread concern. Thereby promoting the exploration and development of cost-effective, selective, portable, rapid and sensitive detection methods for the detection of explosives. Among the various technologies used for explosive detection, fluorescence detection has become an effective sensing method in the field of explosive detection due to its advantages of high sensitivity, good selectivity, fast response, simple operation, strong portability, and low cost. . [0003] At present, most of the fluorescent detection materials for explosives commonly used in this field are small molecule materials. Adsorption is formed through the weak ...

Claims

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Application Information

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IPC IPC(8): C08G61/12G01N21/64C09K11/06
CPCC08G61/124C08G61/126C08G2261/124C08G2261/1412C08G2261/3142C08G2261/3241C08G2261/3243C08G2261/414C08G2261/522C08G2261/94C08G2261/95C09K11/06C09K2211/1416C09K2211/1458G01N21/6428G01N2021/6432
Inventor 宋健李铁
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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