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Oxygen-sensitive fluorescent membrane and preparation method thereof

A sensitive film and fluorescence technology, applied in the direction of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of long response time of the film, and achieve the effect of good repeatability, stable performance and long service life

Inactive Publication Date: 2010-05-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the membrane prepared in the report has a long response time, about 5s, and is only used for the determination of gaseous oxygen concentration.

Method used

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  • Oxygen-sensitive fluorescent membrane and preparation method thereof
  • Oxygen-sensitive fluorescent membrane and preparation method thereof
  • Oxygen-sensitive fluorescent membrane and preparation method thereof

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Experimental program
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Embodiment 1

[0029] 1) Dissolve the fluorescent substance in a certain solvent. In a preferred scheme, the bipyridine ruthenium complex [Ru(bpy) 3 ] 2+ Dissolved in ethanol to obtain a stock solution with a concentration of 2mM;

[0030] 2) Preparation of fluorocarbon sol-gel (Fluorinated xerogels) stock solution: using tetramethoxysilane (TMOS) and trifluoropropyltrimethoxysilane (TFP-TriMOS) as precursors, ethanol as solvent, in Hydrolysis under the catalysis of hydrochloric acid at pH=1. In the preferred scheme, the volume percentage of TFP-TriMOS in the precursor is 30%. The mixed reagent is ultrasonically mixed; .

[0031] 3) Preparation of the sensitive membrane: add the ethanol solution of bipyridyl ruthenium into the fluorocarbon sol-gel solution, and mix evenly. In the preferred scheme, 2mM [Ru(bpy) 3 ] 2+ Sensitive reagents were obtained by ultrasonically mixing with fluorocarbon sol-gel stock solutions at a volume ratio of 1:3. Coating the mixed sensing reagent on a clean...

Embodiment 2

[0035] 1) Dissolve the fluorescent substance in a certain solvent. In a preferred scheme, the o-phenanthroline ruthenium complex [Ru(dpp) 3 ] 2+ Dissolved in ethanol to obtain a stock solution with a concentration of 5 mM;

[0036] 2) Preparation of fluorocarbon sol-gel (Fluorinated xerogels) stock solution: using tetraethoxysilane (TEOS) and trifluoropropyltrimethoxysilane (TFP-TriMOS) as precursors, ethanol as solvent, in Hydrolysis under the catalysis of hydrochloric acid at pH=3. In the preferred scheme, the volume percentage of TFP-TriMOS in the precursor is 50%. The mixed reagent is ultrasonically mixed; .

[0037] 3) Preparation of sensitive membrane: [Ru(dpp) 3 ] 2+ Add the ethanol solution of the fluorocarbon sol-gel solution and mix well. In the preferred scheme, the [Ru(bpy) of 5mM 3 ] 2+ Sensitive reagents were obtained by ultrasonically mixing with fluorocarbon sol-gel stock solutions at a volume ratio of 1:4. Coating the mixed sensing reagent on a clean ...

Embodiment 3

[0041] 1) Dissolve the fluorescent substance in a certain solvent. In a preferred scheme, the platinum porphyrin complex PtOEP is dissolved in tetrahydrofuran to obtain a stock solution with a concentration of 3 mM;

[0042] 2) Preparation of Fluorinated xerogels stock solution: using methyltrimethoxysilane (MTMOS) and trifluoropropyltrimethoxysilane (TFP-TriMOS) as precursors, ethanol as solvent, It is hydrolyzed under the catalysis of hydrochloric acid at pH=4. In the preferred scheme, the volume percentage of TFP-TriMOS in the precursor is 70%. The mixed reagent is ultrasonically mixed; .

[0043] 3) Preparation of the sensitive membrane: Add the tetrahydrofuran solution of PtOEP into the fluorocarbon sol-gel solution, and mix evenly. In a preferred scheme, 3 mM PtOEP and fluorocarbon sol-gel stock solution are ultrasonically mixed at a volume ratio of 1:5 to obtain a sensitive reagent. Coating the mixed sensing reagent on a clean glass slide by dip coating method to obt...

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Abstract

The invention relates to an oxygen-sensitive fluorescent membrane and a preparation method thereof. The invention uses the sol-gel technology to effectively embed bipyridyl ruthenium complex to prepare a fluorocarbon sol-gel optical chemical sensing membrane with good response to oxygen. The membrane prepared by the invention has the advantages of good hydrophobicity and corrosive gas resistance, favorable mechanical property, translucency and flexibility, long service life, wide measurement range, rapid response speed, nice repeatability, stable performance, easy miniaturization and the like.

Description

technical field [0001] The invention relates to an oxygen sensitive film, in particular to a fast-response oxygen fluorescence sensitive film and a preparation method thereof, which is an oxygen sensitive material based on a bipyridyl ruthenium-embedded fluorocarbon sol-gel film. Background technique [0002] Oxygen is the reactant or product of many chemical reactions and biochemical reactions, and is the basic substance for the survival of living organisms. The traditional methods for measuring oxygen include iodometric method (ie Winkler method) and oxygen electrode (ie Clark method). The iodometric method has high measurement accuracy, but it takes a long time and the procedure is cumbersome, which cannot meet the requirements of online measurement. The oxygen electrode method can realize continuous measurement on site, but it needs to consume oxygen, and the electrode used is easily absorbed by the H in the sample. 2 S and other substances are poisoned. Optical oxyge...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 关亚风熊艳宋翠红徐静王建伟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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