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Benzothiadiazole malononitrile and synthesis method thereof, and method for detecting CN<->

A technology of benzothiadiazole malononitrile and synthesis method, which is applied in the field of CN-detection and can solve problems such as rapid poisoning

Active Publication Date: 2018-10-23
FUYANG NORMAL UNIVERSITY
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Problems solved by technology

But cyanide is a highly toxic substance, and it gets poisoned very quickly

Method used

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Embodiment Construction

[0047] 1. Benzothiadiazole malononitrile, as shown in the following formula:

[0048]

[0049] Benzothiadiazole (BTD) has good electron carrier transfer properties and can form a D-A conjugate structure with electron-donating groups. The introduction of benzothiadiazole into the molecule can increase the delocalization range of the π electron of the molecule, which makes the ultraviolet light wave red-shift and play the role of conjugated color enhancement. Due to the introduction of benzothiadiazole in this patent application, the malononitrile-containing molecule can be - The selectivity and sensitivity are greatly improved.

[0050] 2. The synthetic method of benzothiadiazole malononitrile, the synthetic route diagram is as follows figure 1 As shown, including the following steps:

[0051] (1) Synthesis of intermediate TPA-BTD-Br;

[0052] In step (1), 2.7568 g of 4-diphenylaminophenylboronic acid, 2.3576 g of 4,7-dibromo-2,1,3-benzothiadiazole, and 0.1342 g of 4-(triphenylphosphi...

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Abstract

The invention discloses benzothiadiazole malononitrile and a synthesis method thereof, and a method for detecting CN<->. Benzothiadiazole malononitrile is shown as the following formula: the formula is shown in the description. The method for synthesizing benzothiadiazole malononitrile comprises the following steps: 1) synthesis of an intermediate TPA-BTD-Br; (2) synthesis of an intermediate TPA-BTD-CHO; (3) synthesis of benzothiadiazole malononitrile TPA-BTD-BT. The method of fluorescence detection of CN<-> using benzothiadiazole malononitrile comprises the following steps: (1) adding benzothiadiazole malononitrile TPA-BTD-BT to tetrahydrofuran THF as a solvent, and preparing a benzothiadiazole malononitrile TPA- BTD-BT tetrahydrofuran THF solution; (2) adding a sample to be tested into the benzothiadiazole malononitrile TPA- BTD-BT tetrahydrofuran THF solution; (3) identifying, by visual observation, UV-visible absorption spectroscopy or fluorescence spectroscopy, whether the sampleto be tested contains CN<->. By the method for detecting CN<->, a CN<-> turn-on type fluorescence sensor with high selectivity and strong anti-interference ability is successfully constructed.

Description

Technical field [0001] This invention relates to CN - Detection technology field. Specifically, benzothiadiazole malononitrile and its synthesis method and detection of CN - Methods. Background technique [0002] Cyanide is widely used in industrial production and daily life, and can be used in electroplating, plastic manufacturing, metallurgy, gold extraction and leather making in industrial production. But cyanide is a highly toxic substance, and it is poisoned very quickly. They can enter the human body through many ways, such as skin absorption, wound entry, respiratory tract inhalation, etc. After entering the human body, they can poison hemoglobin in the blood, causing breathing difficulties, and suffocation of cells due to hypoxia. Adults who take 150-250mg orally can cause death. Therefore, develop a rapid and accurate CN detection - The ion method is very meaningful. In the past few decades, chemical sensor fluorescent probes have - The superior sensitivity and select...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D285/14G01N21/64
CPCC07D285/14G01N21/643
Inventor 凡素华张灵美刘平平
Owner FUYANG NORMAL UNIVERSITY
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