Method for detecting diethyl chlorophosphate gas and/or sarin toxic gas based on charge transfer complex
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A technology of diethyl clodronate and charge transfer, applied in the field of gas sensing, can solve the problems such as the inability of rapid detection of sarin gas, achieve high efficiency and high specificity detection, improve conductivity and film formation, Effects of high electron and hole mobility
Active Publication Date: 2019-05-14
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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[0004] In order to solve the problems that the sarin poisonous gas in the above-mentioned prior art cannot be quickly detected, the present invention aims to provide a method for detecting clodronate gas and / or sarin poisonous gas based on a charge transfer complex
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Embodiment 1
[0024] (1) Preparation of sensing materials
[0025] Add 1.64mg 7,7,8,8-tetracyanoquinodimethane (TCNQ) into 4ml tetrahydrofuran to dissolve, 2.04mg N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD , Compound 1) was dissolved in 4ml of tetrahydrofuran, and ultrasonicated for 30 minutes to make the solution clear; the TMPD and TCNQ solutions with volume ratios of 1ml:2ml, 2ml:1ml, and 1ml:1ml were divided into three groups and ultrasonicated for 30 minutes to obtain uniform charge transfer Solution of complex (CT complex) 1, the first sensing material.
[0026] (2) Preparation of sensor devices
[0027] Use a pipette gun to transfer the solution of each group of CT complex 1 to the surface of the interdigital electrode in an amount of 10 μl each time, and repeat it several times after natural air drying until the resistance of the interdigital electrode reaches the level of 1-70MΩ, and dry for 10 minutes Afterwards, a thin film with high sensitivity and specificity to diethyl c...
Embodiment 2
[0036] (1) Preparation of sensing materials
[0037] The charge transfer complex ( CT complex) 2 solution, that is, the second sensing material.
[0038] (2) The remaining steps are the same as in Example 1.
[0039] The response to saturated DCP gas concentration was measured using CT complex 2 with a 1:1 molar ratio of TMB to TCNQ.
Embodiment 3
[0041] (1) Preparation of sensing materials
[0042] 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyanodimethyl-p-benzoquinone (F4-TCNQ) and N,N,N',N'-tetramethyl-p-phenyl Diamines (TMPD, compound 1) were mixed to obtain a solution of charge transfer complex (CT complex) 3 , which is the third sensing material.
[0043] (2) The remaining steps are the same as in Example 1.
[0044]The response to saturated DCP gas concentration was measured using CT complex 3 with a 1:1 molar ratio of TMPD to F4-TCNQ.
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Abstract
The invention relates to a method for detecting diethyl chlorophosphate gas and/or sarin toxic gas based on a charge transfer complex. The method comprises the steps that a first compound containing aN,N dimethyl aromatic amine structure and a second compound containing a tetracyanoquinodimethane structure interacts through intermolecular charge transfer in a solvent to obtain a solution of the charge transfer complex; a sensing material is loaded on the surface of an electrode to form a sensor piece; and the sensor piece is put into the atmosphere containing the diethyl chlorophosphate gas and/or the sarin toxic gas to be detected. According to the method, through the charge transfer complex formed by mixing of the first compound and the second compound in the solvent, the high electronmobility and high hole mobility are achieved, the independent chemical physical properties of the first compound and the second compound are maintained while complexing is conducted, the charge transfer complex can serves as an electrochemical sensing probe to detect the sarin toxic gas, and the problems that in the prior art, detection sensitivity of the sarin toxic gas is low, specificity is low, the means is complex, and the cost is high are solved.
Description
technical field [0001] The present invention relates to the technical field of gas sensing, more specifically to a method for detecting clodronate gas and / or sarin gas based on a charge transfer complex. Background technique [0002] Although there are some traditional detection methods that can be used to detect sarin gas, such as ion mobility spectrometry, mass spectrometry, bioenzyme chemical sensors, surface acoustic waves, fluorescence detection, etc. However, these methods have the disadvantages of high cost, complicated detection methods, unsatisfactory sensitivity and specificity, expensive and non-portable instruments, and cannot meet the characteristics of high sensitivity, high specificity, low cost and portability on site. [0003] Electrochemical detection has the advantages of high detection efficiency and mature and convenient signal processing. However, because traditional electrochemical methods need to be used under conditions such as high temperature or ...
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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
Inventor 陈锦明贺庆国程建功
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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