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Sensor molecule identifying cyanide ions by fluorescence and preparation and application of sensor molecule

A cyanide ion and fluorescence recognition technology, which is applied in the fields of chemical synthesis and anion detection, can solve the problems of inability to detect aqueous phase, harsh conditions, poor selectivity, etc., and achieve the effect of rapid and sensitive detection

Inactive Publication Date: 2015-09-09
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although cyanide ion detection methods have been reported one after another, in general, most cyanide ion sensors still have certain defects, such as poor selectivity, low sensitivity, harsh conditions and the presence of fluoride ions and acetate ions. Cannot be detected in aqueous phase, etc.

Method used

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  • Sensor molecule identifying cyanide ions by fluorescence and preparation and application of sensor molecule
  • Sensor molecule identifying cyanide ions by fluorescence and preparation and application of sensor molecule
  • Sensor molecule identifying cyanide ions by fluorescence and preparation and application of sensor molecule

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Embodiment Construction

[0030] Below by specific embodiment CN of the present invention - Synthesis of Sensor Molecules, CN - Detection test paper and in the detection of CN - application is further explained.

[0031] 1. CN - Preparation of the sensor: In a 100mL round bottom flask, add 5mmol o-hydroxynaphthaldehyde, 6mmol p-hydrazinobenzenesulfonic acid, 0.17g p-toluenesulfonic acid, 30mL solvent ethanol, reflux and stir overnight at 80°C, the reaction solution It was brownish yellow; after the solution was cooled, it was suction filtered, washed with water and dried to obtain 1.42 g of yellow product X with a yield of 83%. The structural formula of the product is as follows:

[0032]

[0033] X: m.p. =258~260℃ 1 H NMR (DMSO–d6, 600 MHz) δ: 11.76(s, 1H, O-H); δ: 10.62(s, 1H, SO 3 -H) δ: 8.78(s, 1H, N-H) δ: 6.92–7.38 ( 4H, Ar–H); δ: 7.55-8,.36 (6H,Naph-H).

[0034] 2. CN - Preparation of detection test paper: first soak the filter paper with dilute hydrochloric acid, then wash it with dis...

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Abstract

The invention provides a sensor used for selectively identifying cyanide ions by fluorescence and belongs to the field of negative ions. The sensor uses hydroxyphenylacetic naphthaldehyde and p-hydrazino-benzenesulfonic acid as substrate, p-toluenesulfonic acid as catalyst and ethyl alcohol as solvent, performing backflow reaction, cooling, filtering, washing and drying to obtain yellow target product. Via experiment, in DMSO / H2O solution of the sensor molecule, DMSO solution of F-, Cl-, Br-, I-, AcO-, H2PO4-, HSO4-, ClO4- and SCN- is added respectively, and the solution can emit green fluorescent light under ultraviolet lamp when only CN- is added. Accordingly, the sensor can identify the cyanide ions, the minimum detection limit is 2.17X10-8 mol / L, and this identification process is not interfered by other negative ions.

Description

technical field [0001] The present invention relates to a cyanide ion sensor, in particular to a sensor molecule for highly selective fluorescent recognition of cyanide ions; the present invention also relates to the synthesis of the cyanide ion sensor and its application in identifying cyanide ions, belonging to chemical The field of synthesis and the field of anion detection. Background technique [0002] Cyanide is a highly toxic substance with a very small lethal dose to humans. It can enter the human body through the respiratory tract or digestive tract, and combine with ferric iron in the cytochrome oxidase in the body to prevent cells from absorbing oxygen and make the body hypoxic, thereby causing poisoning Even death, however, cyanide is indispensable in people's production and life. Cyanide is widely used in mineral mining, metallurgy and electroplating industries, and cyanide is also an important raw material for the synthesis of medicines, pesticides, and insecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/46C07C303/22C09K11/06G01N21/64
Inventor 张有明吴红平蔡毅王芹芹林奇姚虹魏太保
Owner NORTHWEST NORMAL UNIVERSITY