Poly3,4-diethyl hydroxy thiophene gas sensitive material and preparation method thereof
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A technology of bis-ethylhydroxythiophene and gas-sensing materials, which is applied in the field of organic electronic materials to achieve the effect of enhancing sensitivity and selectivity and enhancing sensitivity
Active Publication Date: 2013-03-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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In the literature, there is no report on the use of polythiophene and its derivatives for nerve gas measurement
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Embodiment 1
[0031] Under the protection of nitrogen, add 1g (0.041mol) of magnesium powder to 4.84g (0.02mol) of 3,4-dibromothiophene, stir at reflux for 6h at 68°C, cool to room temperature, and then place the solution in ice water to mix Add 2 g (0.045 mol) of ethylene oxide to the solution, stir at low temperature for 2 h, then reflux and stir at 40 °C for 12 h. After the reaction solution was cooled to room temperature, 10ml of 10% dilute hydrochloric acid was added dropwise thereto, and stirring was continued for 2h. The final reaction product was washed with dilute hydrochloric acid and deionized water, and then washed with CH 2 Cl 2 The extraction was repeated three times, the organic phase was extracted, and the solvent was distilled under reduced pressure to obtain a light yellow liquid, which was the monomer of 3,4-diethylhydroxythiophene, and the yield of this step was 75.3%.
[0032] Dissolve 10g (0.06mol) of ferric chloride in 100ml of chloroform, and stir ultrasonically fo...
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Abstract
The invention discloses a poly3,4-diethyl hydroxy thiophene gas sensitive material and a preparation method thereof and belongs to the technical field of organic electronic materials. In the invention, a thiophene monomer is introduced to ethyl hydroxyl as an organic phosphorus sensitive functional group by a sample format reaction; and a thiophene organic phosphorus sensitive polymer material of which one branched chain contains the ethyl and hydroxyl is obtained by an oxidative polymerization reaction. Since the hydroxyl is introduced to the thiophene, the polymer sensitive material disclosed by the invention can be used for selectively adsorbing nerve gas and a stimulant thereof so as to enhance the sensitivity and the selectivity of the sensitive material. Meanwhile, according to the poly3,4-ddiethyl hydroxy thiophene gas sensitive material provided by the invention, the ethyl and hydroxyl are introduced to a thiophene repetitive unit, so that the sensitivity is further enhanced. The poly3,4-diethyl hydroxy thiophene gas sensitive material disclosed by the invention can be used for detecting the nerve gas.
Description
technical field [0001] The invention belongs to the technical field of organic electronic materials and relates to gas-sensitive materials, in particular to a polythiophene derivative gas-sensitive material and a preparation method thereof. Background technique [0002] Conductive polymers mainly include polyaniline (PANI), polypyrrole (PPy) and polythiophene (PTH), which are commonly used gas-sensing materials and are widely used to detect various inorganic and organic volatile gases (VOC), such as NH 3 , NO x 、H 2 S, HCl, CO, H 2 , O 3 , CO 2 、CHCl 3 , CCl 4 , methanol, ethanol, isopropanol, butanol, acetone, benzene, toluene, ethylbenzene, xylene, formaldehyde, acetaldehyde, diethyl ether, acetic acid, trimethylamine, etc. However, there are few reports on the use of such materials for detecting chemical warfare agents. The reason is that the sensitivity of existing conductive polymer materials is not enough to meet the detection requirements for nerve gas and must...
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