Monomolecular layer fluorescent sensing thin film-based sensor array and mode identification thereof on harmful gas

A sensor array and fluorescent sensing technology, applied in the field of chemical analysis and detection, can solve the problems of high sensor selectivity requirements, limited sensor application range, complex operation, etc., and achieve high-sensitivity differential detection, low cost, and good stability.

Active Publication Date: 2019-01-29
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods used to detect different toxic gases at home and abroad mainly include semiconductor electronic sensors, gas chromatography, resistance sensors, surface acoustic wave sensors, etc. These methods can realize the ...

Method used

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  • Monomolecular layer fluorescent sensing thin film-based sensor array and mode identification thereof on harmful gas
  • Monomolecular layer fluorescent sensing thin film-based sensor array and mode identification thereof on harmful gas
  • Monomolecular layer fluorescent sensing thin film-based sensor array and mode identification thereof on harmful gas

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Embodiment 1

[0022] Probe 1 was dissolved in 1-butyl-3-methylimidazolium tetrafluoroborate to prepare a 20 μmol / L ionic liquid solution of probe 1; the ionic liquid solution of probe 1 was mixed with hydrophilic and hydrophobic domains In contact with the gold substrate, an ordered pattern of droplets with a diameter of 50 μm is formed in the region of the hydrophilic mercaptoundecanoic acid monolayer, and a microarrayed monolayer fluorescent sensing film S1 is prepared; the probe 2 is dissolved in In PEG 200, a 65 μmol / L PEG 200 solution of probe 2 was prepared; the PEG 200 solution of probe 2 was brought into contact with a gold substrate having hydrophilic and hydrophobic micro-regions, and a monomolecular layer of hydrophilic mercaptoundecanoic acid The regions form an ordered pattern with a droplet diameter of 50 μm, and a microarrayed monomolecular layer fluorescent sensing film S2 is prepared. According to the above method, prepare 80 μmol / L ionic liquid solution of probe 2, and pre...

Embodiment 2

[0024] Adopt the sensor array of embodiment 1 to detect 11 kinds of poisonous gases under the immediately threatening concentration of life and health

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Abstract

The invention discloses monomolecular layer fluorescent sensing thin film-based sensor array and a mode identification thereof on harmful gas. The sensor array comprises microarray monomolecular layerfluorescent sensing thin films, and each sensing thin film is formed by generating absorption of ion liquids of two amphiphilic boron-dipyrromethene derivative or PEG 200 solution at a hydrophilic microregion with a hydrophilic and hydrophobic microregion gold substrate and automatically assembling the two amphiphilic boron-dipyrromethene derivatives at a gas-liquid interface. A fluorescent response signal of each sensing thin film on the harmful gas in a sensor array is acquired, the obtained multi-dimensional fluorescent signal is processed, so that mode identification of the harmful gas such as volatile organic compound, nerve gas and an explosive substance is achieved. The sensor array is low in cost, the microarray monolecular layer fluorescent sensing thin film has the advantages ofgood stability, long service lifetime and high detection sensitivity, the detection method is simple, is easy to operate and is wide in application.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a sensor array based on a monomolecular layer fluorescent sensing film and a method for detecting and identifying various toxic gases by using the array. Background technique [0002] In recent years, terrorism and environmental pollution have seriously threatened people's lives and production safety. Nerve gas, a type of organophosphorus compound, was first synthesized in 1854 and has developed into a widely used chemical warfare weapon over the past eight decades. Skin absorption in a short period of time can paralyze muscles, and in severe cases can cause death by suffocation. In addition, with the general improvement of human production and living standards, environmental pollution has increasingly become a factor that endangers human health. Volatile organic compounds are common chemical substances widely present in the air, which mainly ...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/64G01N21/6408G01N2021/6417
Inventor 刘静赵琪韩慧敏刘自如雷海瑞花盼盼
Owner SHAANXI NORMAL UNIV
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