Triethylamine gas-sensitive material based on porphyrin polymer

Abstract

The invention provides a sensing material for detecting triethylamine. The sensing material is a porphyrin conjugated polymer molecule semiconductor material which is obtained by carrying out Sonogashira coupling reaction on iron tetrabromophenylporphyrin and iron p-alkynylphenylporphyrin. According to the application, the porphyrin conjugated polymer molecule semiconductor material is used for triethylamine sensing detection, the porphyrin conjugated polymer is used for triethylamine detection for the first time, and meanwhile, the application of porphyrin compounds in the sensing field is expanded. In the preparation process, the polymer is dropwise added to the glass substrate with the ITO interdigital electrode to serve as the semiconductor active layer, sensitive and rapid detection of low-concentration triethylamine under the room temperature condition is achieved, and the detection limit is 0.34 ppm. The material can realize sensitive response to triethylamine at room temperature, and has extremely high practical value for environmental monitoring of triethylamine.

Description

technical field [0001] The invention relates to the research field of triethylamine room temperature detection, in particular to the preparation and application of a porphyrin conjugated polymer gas-sensitive material. The porphyrin conjugated polymer was obtained by reacting tetrabromophenylporphyrin iron with p-alkynyl phenylporphyrin iron, which was used as an active material for the detection of triethylamine. This material can realize the sensitive detection of triethylamine at room temperature , which is of great significance for its practical application. Background technique [0002] Today, gas sensors are essential equipment for gas leak detection, public safety, and medical diagnosis. The demand for real-time monitoring of ambient air quality has led to the rapid expansion of the gas sensor market. Vapors of volatile organic compounds (VOCs) are ubiquitous in modern life as they are an integral part of the production of several chemicals and commodities and are wi...

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Problems solved by technology

However, the conductivity of porphyrin molecules is poor, and more and more researches choose to combine porphyrin with other materials to further improve the conductivity and gas sensing properties. Here, the two porphyrins are connected by alkyne bonds to expand the The degree of conjugation of porphyrin accelerates the flow of electrons, which is beneficial to improve the conductivity, thereby improving the sensitive response of the device. The use of this porphyrin conjugated polymer for the detection of triethylamine has not been reported yet.

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