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Schiff base sensor molecule, its synthesis, and its application in fluorescent colorimetric detection of CN<-> in water

A sensor and Schiff base technology, applied in the field of anion detection, can solve the problems of complex sensor structure, long reaction time, restricting the popularization and use of sensor molecules, etc.

Inactive Publication Date: 2014-08-20
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But most reactive CN - Sensors are often complex in structure and difficult to synthesize. The recognition process of some reactive sensor molecules requires a long reaction time. These factors restrict the popularization and use of these sensor molecules.

Method used

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  • Schiff base sensor molecule, its synthesis, and its application in fluorescent colorimetric detection of CN&lt;-&gt; in water
  • Schiff base sensor molecule, its synthesis, and its application in fluorescent colorimetric detection of CN&lt;-&gt; in water
  • Schiff base sensor molecule, its synthesis, and its application in fluorescent colorimetric detection of CN&lt;-&gt; in water

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Embodiment Construction

[0042] The synthesis of the sensor molecule of the present invention and the detection of CN in water will be carried out through specific examples below. - application is further explained.

[0043] 1. Sensor molecules Sz Synthesis: Put 6mmol of 2-aminobenzothiazole and 6mmol of 2-hydroxy-1-naphthaldehyde in a 100 mL round bottom flask, add 20 mL of ethanol, 1 mL of glacial acetic acid, and heat to reflux at 80°C on an oil bath for 6 hours. After the reaction was stopped, it was cooled to room temperature, and a crystalline substance precipitated out of the solution within 30 min; it was vacuum filtered and dried to obtain a yellow solid substance. The yield is 80% to 85%. The measured melting point is 216-217°C. NMR titration, high-resolution mass spectrometry, and infrared characterization data are the same as before.

[0044] 2. Load sensor molecules Sz CN - Preparation of test paper: Soak the filter paper with dilute hydrochloric acid, then wash it with distilled wa...

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Abstract

The invention relates to a synthesis method of a Schiff base sensor molecule, and belongs to the technical field of anion detection. The sensor molecule has the advantages of highly selective colorimetric fluorescent binary channel identification of CN<-> in water, short response time, and no influences of anions on the detection process. Determination results show that the naked eye detection limit and the fluorescent spectrum detection limit of the sensor molecule to CN<-> in water are 2.0*10<-6>mol / L and 3.42*10<-8>mol / L respectively, and are far lower than the content standard (below 1.8muM) of normal drinking water, prescribed by World Health Organization.

Description

technical field [0001] The invention belongs to the technical field of anion detection, and relates to a Schiff base sensor molecule and its synthesis; the invention also relates to the use of the Schiff base sensor molecule in fluorescence and colorimetric detection of CN in water. - Applications. Background technique [0002] Cyanide ion (CN - ) is a highly toxic substance, CN - It is very easily absorbed by the human body and can enter the human body through the mouth, respiratory tract or skin. A small amount of CN - It can cause acute poisoning or even death. However, cyanide is also an important chemical raw material, which is widely used in chemical processes such as metallurgy and electroplating. In addition, some plants also contain cyanide. Improper use of cyanide in industrial production or improper diet in life may cause cyanide poisoning. Therefore, CN - The detection has important applications in the fields of life sciences and environmental monitoring. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D277/82G01N21/78G01N21/33G01N21/64
CPCC07D277/82G01N21/643G01N21/78G01N2021/7769
Inventor 林奇蔡毅李乔张有明魏太保
Owner NORTHWEST NORMAL UNIVERSITY
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