Enhanced oxygen fluorescence sensitive film and preparation method thereof

A sensitive film and enhanced technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc.

Inactive Publication Date: 2012-05-16
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 titanium dioxide particles used in the above reports are all micron-sized

Method used

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  • Enhanced oxygen fluorescence sensitive film and preparation method thereof
  • Enhanced oxygen fluorescence sensitive film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 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 5mmol / L;

[0024] 2) Preparation of fluorocarbon sol-gel stock solution: using propyltrimethoxysilane (PTMOS) and trifluoropropyltrimethoxysilane (TFP-TriMOS) as precursors, using ethanol as solvent, at pH=1 Hydrolysis under the catalysis of hydrochloric acid. In a preferred scheme, the volume percentages of PTMOS and TFP-TriMOS in the precursor are 16% and 34% respectively. Sonicate the mixed reagent for 1 hour; obtain fluorocarbon sol-gel;

[0025] 3) [Ru(bpy) 3 ] 2+ Add the ethanol solution of the fluorocarbon sol-gel solution and mix well. In the preferred scheme, [Ru(bpy) 3 ] 2+ The solution and the fluorocarbon sol-gel solution were ultrasonically mixed according to the volume ratio of 1:4 to obtain the [Ru(bpy)-containing 3 ] 2+ The sol-gel matrix;

...

Embodiment 2

[0031] 1) Dissolve the fluorescent substance in a certain solvent. In a preferred scheme, the o-phenanthroline ruthenium complex [Ru(dpp) 3 ] 2+ Dissolved in methyl ethyl ketone to obtain a stock solution with a concentration of 10mmol / L;

[0032] 2) [Ru(dpp) 3 ] 2+ The methyl ethyl ketone solution is mixed evenly with polystyrene. In the preferred scheme, [Ru(dpp) 3 ] 2+ The solution and the polystyrene solution were ultrasonically mixed at a volume ratio of 1:4 to obtain [Ru(dpp) 3 ] 2+ polystyrene matrix;

[0033] 3) Ultrasonic dispersion of nano-titanium dioxide in the [Ru(dpp) 3 ] 2+ A sensitive membrane coating reagent was obtained in a polystyrene matrix. In the preferred version, the mass ratio of the two nanometer titanium dioxide particles is 4:1 (small particle size: large particle size), and the total concentration in the matrix is ​​60mg / mL;

[0034] 4) Coating the sensitive membrane coating reagent evenly on the glass slide, and drying in an oven at 8...

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Abstract

The invention relates to an enhanced oxygen fluorescence sensitive film and a preparation method thereof. According to the preparation method, a sol-gel or polymer matrix is used for effectively embedding a fluorescent probe metal complex and a fluorescence enhancing substance nano titanium dioxide particle so as to prepare a nano material doped photochemical sensor film with enhanced response to oxygen. An oxygen sensitive film prepared according to the preparation method has advantages of uniform surface, good mechanical strength, good fluorescence intensity and easiness in manufacturing process and can be detected by a photoelectric detection device with low sensitivity, and the sensor cost is reduced effectively; therefore the enhanced oxygen fluorescence sensitive film is easy to miniaturize and generalize.

Description

technical field [0001] The invention relates to an enhanced oxygen fluorescence sensitive membrane and a preparation method thereof, in particular to a method for enhancing the fluorescence intensity of the oxygen sensitive membrane by embedding nano titanium dioxide particles. Background technique [0002] Oxygen is the basic substance for the survival of living organisms. The detection of oxygen and dissolved oxygen is of great significance in many fields such as biology, medicine, environment and industrial process. Optical oxygen sensor is a sensing technology gradually developed in the mid-eighties. Most of these sensors are developed based on the principle that the fluorescence or phosphorescence of organic dyes, polycyclic aromatic hydrocarbons and metal complexes can be quenched by oxygen. It does not involve the mass consumption of oxygen, and the equilibrium time is very short; it can work normally at normal temperature and pressure, and can also work at lower or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/02
Inventor 段春凤关亚风
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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