Cyanide ion sensor molecule, as well as preparation method and application thereof in detection of cyanide ions

A cyanide ion and sensor technology, which is applied in the field of anion detection, can solve the problems of single spectrum detection of sensors, difficulty in detecting cyanide ions, and difficult synthesis of sensor molecules, and achieve the effect of simple synthesis method, low cost and good application prospects

Inactive Publication Date: 2016-06-22
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, on the one hand, many fluorescent probes for cyanide ion have been synthesized, but most of the sensors are single-spectrum detection, and most of the sensor molecules are difficult to synthesize
On the other hand, in biological and environmental systems, cyanide ions often appear in aqueous solutions, but most sensors are insoluble in water, and it is difficult to detect cyanide ions, so a sensor that can detect cyanide ions in aqueous media is needed. Colorimetric, Fluorescent Sensors

Method used

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  • Cyanide ion sensor molecule, as well as preparation method and application thereof in detection of cyanide ions
  • Cyanide ion sensor molecule, as well as preparation method and application thereof in detection of cyanide ions
  • Cyanide ion sensor molecule, as well as preparation method and application thereof in detection of cyanide ions

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Embodiment Construction

[0037] The synthesis of the sensor molecule FC of the present invention and the detection of CN in water will be carried out through specific examples below. - application is further explained.

[0038] 1. Synthesis of sensor molecule FC

[0039] (1) Synthesis of 2-hydroxy-3-naphthoic acid ester: 2-hydroxy-3-naphthoic acid (0.94g, 5mmol) and 98%H 2 SO 4 (30μL, 10mol%) was added to 40mL of methanol, and refluxed at 65°C for 8h to obtain 2-hydroxy-3-naphthoate;

[0040] (2) Synthesis of intermediate 2-hydroxy-3-naphthoic acid hydrazide: Take 2-hydroxy-3-naphthoic acid ester (2.02g, 10mmol) and hydrazine hydrate (0.5g, 10mol) and add it to 30mL ethanol , stirred and refluxed at 80°C for 12h, cooled to room temperature, washed with 200mL distilled water, and a light yellow powder intermediate was precipitated;

[0041] (3) Synthesis of sensor molecule FC: Take the intermediate light yellow powder (1.01g, 5mmol), N,N-ethyl salicylaldehyde (0.97g, 5mmol), add it to 30mL ethanol,...

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Abstract

The invention discloses a cyanide ion fluorescence sensor taking N,N-diethyl salicylaldehyde as a fluorescence signal group and acylhydrazone as a recognition site. The sensor is prepared by performing esterification and hydrazinolysis on 2-hydroxy-3-naphthoic acid and reacting with N,N-diethyl salicylaldehyde. The recognition effect of the sensor for F-, Cl-, Br-, I-, AcO-, H2PO4-, HSO4-, ClO4-, CN- and SCN- totally ten kinds of negative ions is studied by the colorimetric method and fluorescent spectrometry, and indicates that the sensor molecule can perform single selection recognition on cyanide ions in a water-containing system and has relatively high sensitivity on CN- detection, and the recognition process is not interfered by other negative ions. The invention further provides CN- detection test paper based on the sensor molecule. The test paper can be used for conveniently and quickly detecting CN- in a water-containing medium. The sensor molecule FC which is designed and synthesized by the invention is simple in structure, simple and convenient in synthesizing method and low in cost, and has a good application prospect in CN- detection.

Description

technical field [0001] The invention belongs to the field of anion detection, and relates to a cyanide ion sensor molecule, in particular to a colorimetric cyanide ion with N,N-diethyl salicylaldehyde as a fluorescent signal group and acylhydrazone as a recognition site 1. Fluorescence sensor molecule; the present invention also relates to the synthesis method of the sensor molecule and the application of detecting cyanide ion in aqueous system. Background technique [0002] Cyanide is widely used in gold mining, electroplating, metallurgy, etc., and plays an important role in industrial production. However, cyanide is highly toxic and easily absorbed by the human body, and can enter the human body through the mouth, respiratory tract or skin. According to the regulations of the World Health Organization, CN in normal drinking water － The content should be lower than 1.9μM, the excess CN － It can cause vomiting, convulsions, loss of will and eventually death. Due to its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C251/86C07C249/16G01N21/78G01N21/64C09K11/06G01N21/77
CPCC07C67/08C07C241/04C07C249/16C07C251/86C09K11/06C09K2211/1007C09K2211/1011G01N21/643G01N21/78G01N2021/7786C07C243/38C07C69/94
Inventor 魏太保程晓斌李辉林奇姚虹张有明
Owner NORTHWEST NORMAL UNIVERSITY
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