Benzothiadiazole malononitrile and its synthesis method 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 the problems of rapid poisoning and the like

Active Publication Date: 2020-07-03
FUYANG NORMAL UNIVERSITY
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Problems solved by technology

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

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Embodiment Construction

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

[0048]

[0049] Benzothiadiazole (BTD) has good electron carrier transport properties and can form a D-A conjugated structure with electron-donating groups. The introduction of benzothiadiazole into the molecule can increase the delocalization range of the π electrons of the molecule, making the ultraviolet light wave red-shifted and playing the role of conjugation hyperchromicity. Due to the introduction of benzothiadiazole in this patent application, it is possible to make the molecules containing malononitrile to CN - The selectivity and sensitivity are greatly improved.

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

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

[0052] In step (1), 2.7568g of 4-dianilinophenylboronic acid, 2.3576g of 4,7-dibromo-2,1,3-benzothiadiazole, and 0...

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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] The invention relates to CN - detection technology field. Specifically benzothiadiazole malononitrile and its synthetic method and detection 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 tanning in industrial production. But cyanide is a highly toxic substance, and poisoning happens very quickly. They can enter the human body through many ways, such as skin absorption, wound entry, respiratory inhalation, etc. After entering the human body, they can poison the hemoglobin in the blood, resulting in difficulty in breathing and suffocation due to lack of oxygen in cells. Adult oral administration of 150-250mg can cause death. Therefore, the development of a rapid and accurate detection of CN - The method of ions is very interesting. In the past few decades, fluorescent probes for chemical sensors hav...

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Application Information

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Patent Type & Authority Patents(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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