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Ionic liquid micro-array monomolecular-layer fluorescent sensing film, and preparation method and application thereof

A single molecular layer, fluorescent sensing technology, applied in the direction of fluorescence/phosphorescence, chemical instruments and methods, analytical materials, etc., can solve the problem of limiting applications, affecting the response speed, sensitivity and stability of chemical sensors, and uneven distribution of fluorescent species Molecular permeability and other problems, to achieve long service life, solve the effects of poor stability and permeability, and easy operation

Active Publication Date: 2016-04-27
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the sensing films prepared by the physical encapsulation method have the problems of uneven distribution of fluorescent species and permeability of gas molecules, which seriously affect the response speed, sensitivity and stability of chemical sensors, and greatly limit their application in reality.

Method used

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  • Ionic liquid micro-array monomolecular-layer fluorescent sensing film, and preparation method and application thereof
  • Ionic liquid micro-array monomolecular-layer fluorescent sensing film, and preparation method and application thereof
  • Ionic liquid micro-array monomolecular-layer fluorescent sensing film, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Preparation of polydimethylsiloxane template with planar structure

[0027] Mix the liquid polydimethylsiloxane prepolymer with the corresponding curing agent (184 can glue product of Dow Corning Company) according to the mass ratio of 9:1, and after vacuum degassing at 30°C for 30 minutes, pour it into an orderly pattern In a mold composed of a melted photoresist plate and flat glass, cure at 80°C for 8 hours, cool to room temperature naturally, carefully peel off the cured PDMS film layer from the mold, and cut off the four sides without the patterned area to obtain PDMS templates with microscopically ordered surface structures.

[0028] 2. Preparation of gold substrates with hydrophilic and hydrophobic micro-domains

[0029]Mix 30% hydrogen peroxide aqueous solution with 98% sulfuric acid in a volume ratio of 3:7 to prepare a lotion; wash the silicon wafer with distilled water and ethanol, dry it and immerse it in the lotion, heat and wash solution to 80°C, acti...

Embodiment 2

[0033] The application of the ionic liquid microarray monomolecular layer fluorescent sensing film containing the amphiphilic fluoroborate dipyrrole derivative prepared in Example 1 in the detection of formaldehyde gas is as follows:

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Abstract

The invention discloses an ionic liquid micro-array monomolecular-layer fluorescent sensing film, and a preparation method and application thereof. The ionic liquid micro-array monomolecular-layer fluorescent sensing film is prepared by self-assembling an amphiphilic BOPIDY derivative with a BOPIDY host molecule as a hydrophobic head group and an ether oxygen chain as a hydrophilic tail in hydrophilic ionic liquid 1-butyl-3-methylimidazole tetrafluoroborate and then transplanting the prepared monomolecular-layer fluorescent sensing film onto a gold substrate through microcontact transferring technology. The preparation method is simple to operate and has mild reaction conditions; the prepared fluorescent sensing film has good stability, long service life and high sensitivity in detection of formaldehyde gas and can be applied to sensors for detecting formaldehyde gas; and the fluorescent sensing film can also be installed on a detection apparatus used for detecting formaldehyde gas in virtue of fluorescence principles, and response of the fluorescent sensing film to formaldehyde gas is monitored in real time.

Description

technical field [0001] The invention belongs to the technical field of supramolecular fluorescent sensing thin film materials, in particular to a preparation method and application of an ionic liquid microarray monomolecular layer fluorescent sensing thin film containing amphiphilic fluoroboron dipyrrole derivatives. Background technique [0002] In recent years, with the development of society and economy, the gas produced by environmental pollution endangers the living environment and physical and mental health of human beings, especially indoor volatile organic compounds (Volatile Organic Compounds, referred to as: VOCs), which has attracted widespread attention to its harm. . VOC outdoors mainly comes from transportation and fuel combustion, etc.; indoors mainly comes from construction and decoration materials, furniture, household appliances, cleaning agents and human body emissions, coal and natural gas and other combustion products, smoke from smoking, heating and coo...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07F5/02G01N21/64
CPCC07F5/022C09K11/06C09K2211/1029G01N21/6402G01N2021/6417
Inventor 刘静雷海瑞严军林薛佳男杨颖超
Owner SHAANXI NORMAL UNIV
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