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A kind of ultrasensitive oxygen sensor and preparation method thereof

An oxygen sensor and sensitive technology, applied in the field of oxygen sensors, can solve the problems of self-extinction and poor repeatability, deviation of fluorescence quenching effect, dye leakage, etc., and achieve high oxygen-induced quenching rate, good linear relationship, and oxygen response speed. quick effect

Active Publication Date: 2016-03-23
SOUTHEAST UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Optical oxygen sensors generally use physical or chemical methods to immobilize fluorescent indicators on a certain substrate to obtain optical oxygen sensors. The physical method is to dissolve or disperse fluorescent indicators in solid phase supports and plasticizers, but Due to the large polarity difference between the fluorescent indicator and the organic polymer carrier or matrix, it is difficult to uniformly disperse and immobilize the fluorescent indicator in the matrix, and the phenomenon of aggregation or agglomeration of the fluorescent indicator is prone to occur, resulting in the fluorescence quenching effect. Deviation from the Stern-Volmer curve, internal absorption, self-extinction and poor repeatability, etc., seriously affect the sensitivity and accuracy of the sensor
At the same time, there are also problems such as dye leakage, precipitation and loss.

Method used

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  • A kind of ultrasensitive oxygen sensor and preparation method thereof
  • A kind of ultrasensitive oxygen sensor and preparation method thereof
  • A kind of ultrasensitive oxygen sensor and preparation method thereof

Examples

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Embodiment 1

[0042] A kind of ultrasensitive oxygen sensor, described oxygen sensor is to assemble ruthenium-based fluorescent complex [Ru(bpy) 2 (phen-R)], the general formula is:

[0043] [Ru(bpy) 2 (phen-R)-YSiO 3 -Al 2 o 3 ]

[0044] Among them, the ruthenium-based fluorescent complex [Ru(bpy) 2 (phen-R)] is bipyridine o-phenanthroline ruthenium (Ⅲ) complex, YSiO 3 It is a silane coupling agent, bpy is 2,2'-bipyridine, phen is 1,10-phenanthroline, and R is an active functional group with different electron affinities.

[0045] The ruthenium-based fluorescent complex [Ru(bpy) 2 (phen-R)] the structural formula is:

[0046]

[0047] In this example,

[0048] The R is an active functional group such as amino, bromine, chlorine or carboxyl, nitro.

[0049] The selected silane coupling agent YSiX 3 Including 3-glycidyl propyl trimethoxysilane, vinyl trimethoxy silane, vinyl triethoxy silane, γ-glycidyl ether propyl trimethoxy silane, γ-aminopropyl triethoxy silane And a kind ...

Embodiment 2

[0052] A preparation method of an ultrasensitive oxygen sensor, comprising the steps of:

[0053] Step 1. Hydroxylation and silanization of anodic aluminum oxide template:

[0054] First carry out hydroxylation treatment on the anode aluminum oxide template: immerse the anode aluminum oxide template in the mixture of hydrogen peroxide and concentrated sulfuric acid for 3h to 12h, and the volume ratio of hydrogen peroxide to concentrated sulfuric acid is 1:1 to 1:10; Take it out, wash it with water, dry it with nitrogen, immerse it in a mixture of hydrochloric acid and methanol with a volume ratio of 1:0.5 to 1:5, shake it for 15 to 45 minutes, wash it, and dry it with nitrogen; then dry it with nitrogen. The aluminum oxide template is placed in a sulfuric acid solution with a mass percentage of 50-98% and shaken for 15-45 minutes, washed with water, blown dry with nitrogen, dried and stored in a desiccator to complete the hydroxylation treatment;

[0055] After the hydroxylat...

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Abstract

The invention relates to an ultrasensitive oxygen sensor and a preparation method thereof. The oxygen sensor is characterized in that a ruthenium-based fluorescent complex [Ru(bpy)2(phen-R)] is assembled on an anode aluminum oxide template which is processed through hydroxylation and silanization, the general formula of the oxygen sensor is as follows: [Ru(bpy)2(phen-R)-YSiO3-Al2O3], the ruthenium-based fluorescent complex [Ru(bpy)2(phen-R)] is a duplex pyridine-phenanthroline ruthenium (III) complex, YSiO3 is a silane coupling agent, bpy is 2,2'-dipyridyl, phen is 1,10-phenanthroline, and R is an active functional group with electron affinity. The preparation method comprises the steps: hydroxylating and silanizating the anode aluminum oxide template, and then assembling the ultrasensitive oxygen sensor.

Description

technical field [0001] The invention belongs to the field of oxygen sensors, in particular to a preparation and sensing method of a ruthenium-based fluorescent complex supersensitive oxygen sensor using aluminum oxide as a template. Background technique [0002] Optical oxygen sensing devices based on fluorescence quenching are usually composed of fluorescent indicators and oxygen-permeable support matrices (siloxane polymers, organic glassy polymers, fluoropolymers, etc.), which have high sensitivity and good selectivity. , wide application range and other advantages, is currently one of the most sensitive means of oxygen detection. In recent years, it has been widely used in flow display, chemical and environmental analysis and so on. Among them, transition metal complexes such as Ru, Os, Pt and other complexes. They have the advantages of long luminescence lifetime, high fluorescence quantum efficiency, easy oxygen quenching, and stable chemical properties, and have gra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 祁争健杨帆崔美芳缪智辉
Owner SOUTHEAST UNIV
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