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Application of Ionic Liquid Microarray Sensing Thin Film in Sensing and Recognition of Nitrobenzene

An ionic liquid, sensing and identification technology, applied in material excitation analysis, fluorescence/phosphorescence, instruments, etc., can solve the problems of limited fluorescent species, poor uniformity of fluorescent films, slow response speed, etc. The effect of poor permeability, long service life and high selectivity

Active Publication Date: 2019-02-12
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although researchers have prepared a wide variety of fluorescent solid-state sensing films for the detection of nitrobenzene, the reported solid-state sensing films still suffer from photobleaching, light scattering, slow response and poor uniformity of fluorescent films. The urgent problems to be solved, especially the photobleaching phenomenon at the gas-solid interface greatly limit the choice of fluorescent species

Method used

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  • Application of Ionic Liquid Microarray Sensing Thin Film in Sensing and Recognition of Nitrobenzene
  • Application of Ionic Liquid Microarray Sensing Thin Film in Sensing and Recognition of Nitrobenzene
  • Application of Ionic Liquid Microarray Sensing Thin Film in Sensing and Recognition of Nitrobenzene

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Embodiment 1

[0025] Fabrication of Monolayer Fluorescent Sensing Thin Films Based on Ionic Liquid Microarrays

[0026] Dissolve BDP-OB in 1-butyl-3-methylimidazolium tetrafluoroborate to prepare an ionic liquid solution of 80 μmol / L BDP-OB; mix the ionic liquid solution of BDP-OB with hydrophilic and hydrophobic domains The gold substrate (prepared according to the method disclosed in Example 1 of the invention patent application with the publication number CN105524611A, the difference is that the cetyl alcohol is replaced with perfluorododecanethiol) is in contact with each other, and the hydrophilic mercapto On the ionic liquid microarray with a droplet diameter of 50 μm formed by undecanoic acid monolayer microdomains, the amphiphilic fluoroboron dipyrrole derivative self-assembled to form a monomolecular layer fluorescent sensing film, that is, the ionic liquid microarray-based Monolayer fluorescent sensing film (see figure 1 and figure 2 ).

Embodiment 2

[0028] The application of the monomolecular layer fluorescent sensing film based on the ionic liquid microarray of embodiment 1 in sensing and identifying nitrobenzene gas is as follows:

[0029] The fluorescent sensing film is placed in the air, and the fluorescence emission intensity I of the fluorescent sensing film at a wavelength of 510 nm is measured by a FLS980 single-photon counting time-resolved fluorescence spectrometer (produced by Edinburgh Instrument Company, UK). 0 , and then place the fluorescent sensing film in nitrobenzene vapors with concentrations of 7ppm, 13ppm, 27ppm, 40ppm, 54ppm, 67ppm, 100ppm, and 134ppm respectively, and measure the fluorescence emission intensity corresponding to different concentrations of nitrobenzene systems at a wavelength of 510nm I, draw 1-I / I 0 Values ​​vary with the standard curve of nitrobenzene concentration, the results are shown in image 3 , after calculation, the detection limit of the fluorescent sensing film for nitro...

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Abstract

The invention discloses a monomolecular fluorescence sensing film based on an ionic liquid microarray and application of the monomolecular fluorescence sensing film in sensing recognition of nitrobenzene. The monomolecular fluorescence sensing film is prepared through the following steps that after an ionic liquid solution of an amphipathic boron-dipyrromethene derivative is in contact with a gold substrate with hydrophilic and hydrophobic microcells, the ionic liquid solution is adsorbed in the hydrophilic microcell of the gold substrate to form a microarray, and the amphipathic boron-dipyrromethene derivative is self-assembled in a gas-liquid interface, wherein the amphipathic boron-dipyrromethene derivative is shown in the description. A preparation method of the fluorescence sensing film is simple, the preparation conditions are mild, the obtained fluorescence sensing film is high in stability and long in service life, trace detection on nitrobenzene with high selectivity and high sensitivity can be conducted, and the monomolecular fluorescence sensing film is reversible.

Description

technical field [0001] The invention belongs to the technical field of supramolecular fluorescent sensing thin film materials, and in particular relates to a monomolecular layer fluorescent sensing thin film carrying amphiphilic fluoroborate dipyrrole derivatives on an ionic liquid microarray, and the fluorescent sensing thin film is used in sensing Identify applications in nitrobenzene. Background technique [0002] In recent years, with the development of social economy and the increase of human production activities, the problem of environmental pollution has become more and more prominent, which seriously threatens the safety of human life and physical and mental health. As the simplest nitroaromatic compound, nitrobenzene is also an important raw material for organic synthesis, and is widely used in the industrial production of spices, dyes, plastics and explosives. The nitrobenzene in the environment mainly comes from the waste water and waste gas from chemical plants...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/6454G01N21/6458
Inventor 刘静刘自如雷海瑞严军林赵琪
Owner SHAANXI NORMAL UNIV
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