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Water-soluble conjugated polymer of benzoselenadiazole and preparation method and application of conjugated polymer

A conjugated polymer, benzoselenodiazole technology, applied in chemical instruments and methods, fluorescence/phosphorescence, luminescent materials, etc., can solve the problems of expensive detection, insufficient fast detection, expensive instruments, etc.

Active Publication Date: 2015-01-28
WENZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the detection of these heavy metal ions, people have developed a variety of methods, such as plasma emission spectrometry, atomic absorption spectrometry, atomic emission spectrometry, etc., but there are some defects in these methods, for example, these methods have high technical requirements, and the samples need to be pretreated, The detection is not fast enough, the equipment used is expensive, the maintenance cost is high, the detection is expensive, etc., it is difficult to be widely used

Method used

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  • Water-soluble conjugated polymer of benzoselenadiazole and preparation method and application of conjugated polymer
  • Water-soluble conjugated polymer of benzoselenadiazole and preparation method and application of conjugated polymer
  • Water-soluble conjugated polymer of benzoselenadiazole and preparation method and application of conjugated polymer

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Experimental program
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Embodiment 1

[0079] (1) In a mixed organic solvent of tetrahydrofuran and triethylamine with a volume ratio of 1:1, add the following formula (IV) compound, formula (III) compound, Pd(PPh 3 ) 4 and CuI, thus obtaining the reaction mixture:

[0080]

[0081] Wherein, the molar ratio of formula (IV) compound and formula (III) compound is 1:1; Formula (IV) compound and Pd(PPh 3 ) 4 The molar ratio of Pd(PPh 3 ) 4 The molar ratio with CuI is 1:2. The resulting reaction mixture was stirred and reacted at 75° C. for 48 hours under a nitrogen atmosphere. After the reaction was completed, cool to room temperature, remove the palladium black with a short column of silica gel, remove the solvent by rotary evaporation, dissolve the residue in a small amount of chloroform, and slowly add it dropwise to an appropriate amount of methanol to precipitate a precipitate, stir thoroughly for 30 minutes and then statically Put, filter to obtain red powder, be following formula (II) compound:

[0082...

Embodiment 2-3

[0092] Except that the mol ratio of the formula (IV) compound and the formula (III) compound in "step (1) is 1:0.5, the formula (IV) compound and Pd(PPh 3 ) 4 The molar ratio is 1:0.2, Pd(PPh 3 ) 4 The mol ratio with CuI is 1:3; The mol ratio of formula (II) compound and bromoethane in step (2) is 1:2 " outside, implemented embodiment 2 in the same manner as Example 1, and the final gained formula (I) The compound yield is 85.8%, and other characteristic parameters are the same.

[0093] Except that the mol ratio of the formula (IV) compound and the formula (III) compound in "step (1) is 1:1.5, the formula (IV) compound and Pd(PPh 3 ) 4 The molar ratio is 1:0.05, Pd(PPh 3 ) 4 The mol ratio with CuI is 1:1; The mol ratio of formula (II) compound and bromoethane in step (2) is 1:4 " outside, implemented embodiment 3 in the same manner as Example 1, and the final gained formula (I) The yield of the compound is 89.3%, and other characterization parameters are the same.

Embodiment 4-16

[0095] In addition to step (1) in the Pd (PPh 3 ) 4 Except being replaced with other palladium catalysts in the following table respectively, implemented embodiment 4-16 in the same manner as Example 1, used catalyst, formula (I) compound yield are shown in the following table:

[0096]

[0097] It can be seen that the choice of catalyst is very important. Among all Pd compounds, only Pd(PPh 3 ) 4 The best catalytic effect can be achieved, which proves its catalytic specificity for this reaction.

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Abstract

The invention relates to a benzoselenadiazole-based conjugated polymer used for detecting heavy metal ions or heavy metal-like ions and a preparation method and application of the conjugated polymer. The polymer has good fluorescent response on certain ions and can serve as a fluorescence sensor. In addition, due to the fluorescent response, the polymer can be used for establishing a molecular logic gate with different guest molecules, so that the polymer has good scientific research values and application potential.

Description

technical field [0001] The invention relates to a polymer that can be used as a fluorescent sensor for detecting heavy metal ions, and more particularly relates to a conjugated polymer based on benzoselenadiazole and its preparation method and application, belonging to the field of compound fluorescent sensors. Background technique [0002] With the development of industrialization and urbanization in our country, the environmental pollution problem faced by the whole society is becoming more and more prominent. A large amount of industrial, agricultural and domestic sewage has been directly discharged into the river for a long time, and the water quality of the river is deteriorating day by day. In particular, industrial sewage contains a large amount of heavy metal components, such as Lead, mercury, nickel, copper, cadmium, chromium, iron, etc. These heavy metal ions can accumulate in biological tissues through the food chain, causing acute or chronic poisoning of the human...

Claims

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Application Information

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IPC IPC(8): C08G61/12C09K11/06G01N21/64
Inventor 黄小波丁金昌吴华悦刘妙昌陈久喜雷云祥高文霞
Owner WENZHOU UNIVERSITY
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