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Metal organic polymer-doped nano-silver composite material sensor, and preparation method and application thereof

A metal-organic and composite material technology, which is applied in the analysis of materials, electrochemical variables of materials, and material analysis by electromagnetic means. Simple preparation method and low energy consumption

Inactive Publication Date: 2016-12-14
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, chromatographic methods have been widely used for the separation and analysis of chiral compounds, but the cost of instruments is high, the analysis time is long, and the operation technology requirements are high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of reduced Schiff base ligand H 2 L

[0032] Add 8.9g of L-alanine and 5.6g of potassium hydroxide to 100mL of water; under stirring, add it to a mixture containing 12g of salicylaldehyde and 10 mL of ethanol; stir at room temperature for 30min; cool it in an ice bath, Add 4.6g NaBH after 30min 4 Continue to stir and react for 30min; React at room temperature until the solution turns from yellow to colorless; Regulate pH with hydrochloric acid to be 4.0; The mixed solution was recrystallized; the obtained crystals were washed three times with water and ethanol with a volume ratio of 1:1, and dried to obtain the ligand H 2 L, the yield is 67%.

Embodiment 2

[0033] Example 2 Preparation of a Metal Organic Polymer Doped Nano Silver Composite Sensor

[0034] (1) Preparation of nano silver

[0035] Under magnetic stirring, add 100 mg of polyvinylpyrrolidone PVP to 20 mL of water. After it is completely dissolved, add 80 mg of AgNO3. After continuing to dissolve, add 200 μL of 5.0 mol / L NaCl and keep away from light for 15 minutes to obtain the newly prepared AgCl colloid;

[0036] Take another 20.0 mL, 50.0 mmol / L ascorbic acid, add 2.5 mL, 0.5 mol / L NaOH solution, stir evenly, add 2.5 mL freshly prepared AgCl colloid, and stir for 2 h in the dark to obtain a particle size of 20-25nm The nano-Ag solution is stored in a brown bottle and stored in a refrigerator at 4°C for later use;

[0037] (2) Preparation of metal-organic polymer doped nano-silver composites

[0038] Reduced Schiff base ligand H to 0.039 g 2 Add 0.8 mL of water and 0.8 mL of LiOH aqueous solution with a mass fraction of 0.45% to L, and ultrasonically dissolve at ...

Embodiment 3

[0039] Example 3 Preparation of a Metal Organic Polymer Doped Nano Silver Composite Sensor

[0040] (1) Preparation of nano silver

[0041] Under magnetic stirring, add 120 mg of PVP to 20 mL of water, after complete dissolution, add 85.0 mg of AgNO3, after continuing to dissolve, add 200 μL, 5.0 mol / L NaCl, keep away from light for 15 minutes, and obtain the newly prepared AgCl colloid;

[0042] Take another 20.0 mL, 50.0 mmol / L ascorbic acid, add 2.5 mL, 0.5 mol / L NaOH solution, stir evenly, add 2.5 mL freshly prepared AgCl colloid, and stir for 2 h in the dark to obtain a particle size of 20-25nm The nano-Ag solution is stored in a brown bottle and stored in a refrigerator at 4°C for later use;

[0043] (2) Preparation of metal-organic polymer doped nano-silver composites

[0044] Reduced Schiff base ligand H to 0.039 g 2 Add 1.2 mL of water and 1.2 mL of LiOH aqueous solution with a mass fraction of 0.45% to L, and ultrasonically dissolve at room temperature. CuAc 2 S...

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Abstract

The invention discloses a metal organic polymer {[CuL]2(H2O)}n-doped nano-silver composite material sensor, and a preparation method and application thereof. The preparation method comprises the following steps: (1) taking alkaline reducing Schiff alkali ligands H2L, nano-silver solution and CuAc2 solution as raw materials, and performing ultrasonic treatment to obtain a metal organic polymer-doped nano-silver composite material; (2) modifying an electrochemical chiral working electrode by using the composite material to obtain a chiral sensor; (3) detecting the content of (R)-(+)-1-phenylethylamine and (S)-(-)-1-phenylethylamine enantiomer by adopting a three-electrode system. The preparation method for the composite material and the chiral sensor is simple and convenient and is easy to operate; the technical effect of detecting the content of (R)-(+)-1-phenylethylamine and (S)-(-)-1-phenylethylamine enantiomer is remarkable.

Description

technical field [0001] The invention relates to a metal-organic polymer-doped nano-silver composite material sensor and a preparation method and application thereof, belonging to the technical fields of nano-functional materials, metal-organic composite materials and chiral sensing and detection. Background technique [0002] In the fields of biology, pharmacy and chemical industry, chiral substances are often composed of racemates. Although these enantiomers have the same physical properties, they often have significant differences in biological activity, pharmacological toxicity and metabolic processes in vivo. When chiral compounds enter the body, their physiological effects will be realized by the strict chiral matching and recognition between macromolecules in the body, such as chiral receptors, enzymes, carriers, etc., and in many cases, the enantiomers of chiral compounds are Absorption, distribution, metabolism and excretion in the body vary greatly. That is to say,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327G01N27/26
CPCG01N27/26G01N27/3278
Inventor 匡轩闫涛孙旭张勇王欢王雪莹王志玲
Owner UNIV OF JINAN
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