CN110483798B - Preparation method and application of graphene oxide @ chiral Ni-MOF hybrid material - Google Patents

Preparation method and application of graphene oxide @ chiral Ni-MOF hybrid material Download PDF

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CN110483798B
CN110483798B CN201910813212.4A CN201910813212A CN110483798B CN 110483798 B CN110483798 B CN 110483798B CN 201910813212 A CN201910813212 A CN 201910813212A CN 110483798 B CN110483798 B CN 110483798B
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graphene oxide
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penicillamine
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CN110483798A (en
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刘昭轩
匡轩
李文佳
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University of Jinan
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Abstract

The invention discloses a graphene oxide @ chiral Ni-MOF hybrid material, a preparation method thereof and application of the hybrid material in detection of chiral drug enantiomers, and belongs to the technical fields of nano composite materials and chiral sensing detection. The method mainly comprises the steps of blending an L-tyrosine alkali solution and a nickel nitrate-graphene oxide turbid liquid, and reacting overnight at normal temperature to obtain the graphene oxide @ chiral Ni-MOF hybrid material. The hybrid material is adopted to construct a chiral sensor for sensitive detection of the content of L-penicillamine and D-penicillamine enantiomers. The chiral sensor is simple in method, convenient and fast to operate and good in chiral detection effect.

Description

Preparation method and application of graphene oxide @ chiral Ni-MOF hybrid material
Technical Field
The invention relates to a graphene oxide @ chiral Ni-MOF hybrid material and a preparation method and application thereof, and belongs to the technical field of nano materials, metal organic framework nano hybrid materials and chiral sensing detection.
Background
Chiral metal organic framework Materials (MOFs) are periodically ordered porous crystalline materials which are formed by self-assembling chiral organic bridging ligands and metal ions or metal clusters, and the synthesis operation is relatively simple and the reaction conditions are mild. Currently, chiral MOFs are applied in the fields of heterogeneous asymmetric catalysis, chiral sensing and the like.
Graphene oxide resistivity is only about 10-6Ω · cm, lower than copper, silver, is the substance for which the resistivity has been found to be the smallest at present; its electron mobility exceeds 15000 cm at normal temperature2The V.s is far higher than that of the carbon nano-tube and the silicon crystal. Due to its low resistivity and extremely fast electron transfer speed, the potential is huge in the development of a new generation of electronic devices with thinner size and faster conduction speed.
With the increasing production and use of chiral products, such as chiral pharmaceuticals, there is an increasing awareness
The important pharmacological effects of a single chiral drug and the serious consequences of the use of racemic drugs. In recent years, many developed countries have continually promulgated guidelines or policies regarding the development of chiral drugs in order to solve some of the problems associated with racemic drugs. At present, chiral chromatography has been widely used for separating and analyzing chiral compounds, but the method has certain disadvantages, such as high instrument cost, long analysis time, and particularly difficult realization of in-situ and on-line detection. The electrochemical sensor has the advantages of simple preparation, low cost, high identification efficiency and the like, and has wide research value when being used for identifying chiral substances.
Based on the unique structures and properties of chiral MOFs and graphene oxide, the preparation method of the graphene oxide @ chiral MOFs composite material is developed, and the graphene oxide @ chiral MOFs composite material is used for high-sensitivity electrochemical sensing identification of drug enantiomers and has important significance.
Disclosure of Invention
One of the technical tasks of the invention is to make up for the defects of the prior art and provide a graphene oxide @ chiral Ni-MOF hybrid material and a preparation method thereof.
The second technical task of the invention is to provide the application of the graphene oxide @ chiral Ni-MOF hybrid material, namely the graphene oxide @ chiral Ni-MOF hybrid material is used for efficiently detecting the contents of L-penicillamine and D-penicillamine enantiomers.
In order to achieve the purpose, the technical scheme of the invention is as follows:
1. preparation method of graphene oxide @ chiral Ni-MOF hybrid material
Dissolving 0.30-0.60 g of nickel nitrate in 5-10 mL of water, simultaneously adding 0.1-0.3 g of graphene oxide, and carrying out ultrasonic treatment in a 180W water bath for 5-10 min to obtain a nickel nitrate-graphene oxide mixed suspension;
dissolving 0.50 mmol of L-tyrosine and 0.50-0.58 mmol of sodium hydroxide in 5-8 mL of water to obtain a clear L-tyrosine alkali solution;
adding the L-tyrosine aqueous solution into the nickel nitrate-graphene oxide mixed turbid liquid, stirring for 4-5 h at room temperature, carrying out suction filtration, and drying at 80 ℃ to constant weight to obtain the graphene oxide supported chiral Ni-MOF composite material, namely the graphene oxide @ chiral Ni-MOF hybrid material.
The chiral Ni-MOF belongs to a metal-organic framework and has a chemical formula of [ Ni (Tyr)2·2H2O] ·H2O and Tyr are L-tyrosine negative ions; the unit structure of the Ni-MOF is composed of a Ni (II) ion center, two Tyr negative ions, two host water molecules and a guest water molecule.
The graphene oxide is a commercial product, the thickness of a graphene sheet is 0.5-1.0 nm, and the diameter of the sheet layer is 0.5-5 mu m.
2. Application of graphene oxide @ chiral Ni-MOF hybrid material prepared by the preparation method in 1 in electrochemical sensing detection of penicillamine enantiomer
(1) Preparation of graphene oxide @ chiral Ni-MOF sensor working electrode
Polishing a glassy carbon electrode with the diameter of 4 mm by using alumina powder, cleaning the surface by using water and ethanol, transferring 10 mu L of graphene oxide @ chiral Ni-MOF hybrid material solution to coat the glassy carbon electrode, and airing at room temperature to obtain a graphene oxide @ chiral Ni-MOF hybrid material modified sensor working electrode;
the graphene oxide @ chiral Ni-MOF hybrid material solution is prepared by blending 6 mg of graphene oxide @ chiral Ni-MOF hybrid material with 250 muL of ethanol, 720 muL of water and 30 muL of Nafion and performing ultrasonic treatment for 10-15 min;
(2) detection of L-and D-penicillamine enantiomers
Connecting the working electrode, the Ag-AgCl reference electrode and the platinum sheet counter electrode which are prepared in the step (1) to an electrochemical workstation to prepare a chiral Ni-MOF @ graphene oxide electrochemical chiral sensor;
at 0.1 mol. L-1The KOH solution is an electrolyte solution, a graphene oxide @ chiral Ni-MOF electrochemical chiral sensor is adopted, and a differential pulse voltammetry method is adopted to respectively measure L-penicillamine and D-penicillamine with different concentrationsDrawing an L-penicillamine and D-penicillamine enantiomer working curve of the electrochemical chiral sensor based on graphene oxide @ chiral Ni-MOF according to the current value of the standard solution; and (3) replacing the standard solution of the L-penicillamine and the D-penicillamine with the solution of the sample to be detected, and detecting the content of the L-penicillamine and the D-penicillamine in the sample.
The chiral sensor has a detection range of 0.01-7.8 x 10 for L-penicillamine and D-penicillamine enantiomer solutions-8 g/mL。
Advantageous technical effects of the invention
(1) The preparation of the graphene oxide @ chiral Ni-MOF hybrid material is that the chiral Ni-MOF grows on the surface of the graphene oxide in a self-assembly manner, so that the prepared graphene oxide @ chiral Ni-MOF hybrid material has chirality;
(2) the preparation process has low raw material cost, simple and easily-controlled process and wide application prospect;
(3) the invention provides an electrochemical chiral sensor based on a graphene oxide @ chiral Ni-MOF hybrid material, which is prepared by coating the graphene oxide @ chiral Ni-MOF hybrid material on the surface of a glassy carbon electrode, and is simple in preparation method and easy to operate. The chiral Ni-MOF crystal is loaded on the surface of graphene, more active sites are exposed, the graphene oxide increases the material conductivity, and the synergistic effect of the MOF and the graphene oxide is exerted, so that the chiral sensor prepared based on the composite material can detect the content of chiral enantiomers of L-penicillamine and D-penicillamine, and has the characteristics of quick response, wide detection range, high sensitivity, simplicity in operation, time saving and the like.
Detailed Description
The invention will now be further described with reference to the following examples, but the scope of the invention is not limited to the practice thereof
For example, variations of the present invention that may be made by a person skilled in the art are intended to fall within the scope of the present invention.
Embodiment 1 preparation method of graphene oxide @ chiral Ni-MOF hybrid material
Dissolving 0.30 g of nickel nitrate in 5 mL of water, simultaneously adding 0.1 g of graphene oxide, and carrying out ultrasonic treatment in a 180W water bath for 5min to obtain a nickel nitrate-graphene oxide mixed suspension;
dissolving 0.50 mmol of L-tyrosine and 0.50 mmol of sodium hydroxide in 5 mL of water to obtain a clear L-tyrosine alkali solution;
adding the L-tyrosine aqueous solution into the nickel nitrate-graphene oxide mixed turbid liquid, stirring for 45 h at room temperature, performing suction filtration, and drying at 80 ℃ to constant weight to prepare the graphene oxide supported chiral Ni-MOF composite material, namely the graphene oxide @ chiral Ni-MOF hybrid material.
The composition of the chiral Ni-MOF belongs to a metal-organic framework with a chemical formula of [ Ni (Tyr)2·2H2O] ·H2O and Tyr are L-tyrosine negative ions; the unit structure of the Ni-MOF is composed of a Ni (II) ion center, two Tyr negative ions, two host water molecules and a guest water molecule;
the graphene oxide is a commercial product, the thickness of a graphene sheet is 0.5-1.0 nm, and the diameter of the sheet layer is 0.5-5 mu m.
Embodiment 2 preparation method of graphene oxide @ chiral Ni-MOF hybrid material
Dissolving 0.45 g of nickel nitrate in 7 mL of water, simultaneously adding 0.2 g of graphene oxide, and carrying out ultrasonic treatment in a 180W water bath for 7 min to obtain a nickel nitrate-graphene oxide mixed suspension;
dissolving 0.50 mmol of L-tyrosine and 0.54 mmol of sodium hydroxide in 6 mL of water to obtain a clear L-tyrosine alkali solution;
adding the L-tyrosine aqueous solution into the nickel nitrate-graphene oxide mixed turbid liquid, stirring for 4.5 h at room temperature, performing suction filtration, and drying at 80 ℃ to constant weight to prepare the graphene oxide supported chiral Ni-MOF composite material, namely the graphene oxide @ chiral Ni-MOF hybrid material.
The composition of the chiral Ni-MOF and the source and properties of the graphene oxide were the same as in example 1.
Embodiment 3 preparation method of graphene oxide @ chiral Ni-MOF hybrid material
Dissolving 0.60 g of nickel nitrate in 10 mL of water, simultaneously adding 0.3 g of graphene oxide, and carrying out ultrasonic treatment in a 180W water bath for 10 min to obtain a nickel nitrate-graphene oxide mixed suspension;
dissolving 0.50 mmol of L-tyrosine and 0.58 mmol of sodium hydroxide in 8 mL of water to obtain a clear L-tyrosine alkali solution;
adding an L-tyrosine alkali solution into a nickel nitrate-graphene oxide mixed suspension, stirring at room temperature for 4-5 h, performing suction filtration, and drying at 80 ℃ to constant weight to prepare a graphene oxide supported chiral Ni-MOF composite material, namely a graphene oxide @ chiral Ni-MOF hybrid material;
the composition of the chiral Ni-MOF and the source and properties of the graphene oxide were the same as in example 1.
Example 4 application of graphene oxide @ chiral Ni-MOF hybrid material to electrochemical sensing detection of penicillamine enantiomer
(1) Preparation of graphene oxide @ chiral Ni-MOF sensor working electrode
After the glassy carbon electrode is polished by alumina powder, water and ethanol are used for cleaning the surface, 10 mu L of graphene oxide @ chiral Ni-MOF hybrid material solution is transferred and coated on the glassy carbon electrode, and the glassy carbon electrode is dried at room temperature to obtain a graphene oxide @ chiral Ni-MOF hybrid material modified sensor working electrode;
the graphene oxide @ chiral Ni-MOF hybrid material solution is prepared by blending 6 mg of the graphene oxide @ chiral Ni-MOF hybrid material prepared in example 1 or example 2 or example 3 with 250 muL of ethanol, 720 muL of water and 30 muL of Nafion and performing ultrasonic treatment for 13 min;
(2) detection of L-and D-penicillamine enantiomers
Connecting the working electrode, the Ag-AgCl reference electrode and the platinum sheet counter electrode which are prepared in the step (1) to an electrochemical workstation to prepare a chiral Ni-MOF @ graphene oxide electrochemical chiral sensor;
at 0.1 mol. L-1The KOH of the method is an electrolyte solution, a graphene oxide @ chiral Ni-MOF electrochemical chiral sensor is adopted, the current values of L-penicillamine and D-penicillamine standard solutions with different concentrations are respectively measured by adopting a differential pulse voltammetry method, and the working curves of L-penicillamine and D-penicillamine enantiomers based on the graphene oxide @ chiral Ni-MOF electrochemical chiral sensor are drawn; replacing the solution of the sample to be tested for the L-penicillamine and D-penicillamine standardsA solution for detecting the contents of L-penicillamine and D-penicillamine in a sample;
the chiral sensor has a detection range of 0.01-7.8 x 10 for L-penicillamine and D-penicillamine enantiomer solutions-8 g/mL。

Claims (4)

1. A preparation method of a graphene oxide @ chiral Ni-MOF hybrid material is characterized by comprising the following steps:
dissolving 0.30-0.60 g of nickel nitrate in 5-10 mL of water, simultaneously adding 0.1-0.3 g of graphene oxide, and carrying out ultrasonic treatment in a 180W water bath for 5-10 min to obtain a nickel nitrate-graphene oxide mixed suspension;
dissolving 0.50 mmol of L-tyrosine and 0.50-0.58 mmol of sodium hydroxide in 5-8 mL of water to obtain a clear L-tyrosine alkali solution;
adding the L-tyrosine aqueous solution into the nickel nitrate-graphene oxide mixed turbid liquid, stirring for 4-5 h at room temperature, carrying out suction filtration, and drying at 80 ℃ to constant weight to obtain the graphene oxide supported chiral Ni-MOF composite material, namely the graphene oxide @ chiral Ni-MOF hybrid material.
2. The preparation method of graphene oxide @ chiral Ni-MOF hybrid material of claim 1, wherein the chiral Ni-MOF belongs to metal-organic framework and has chemical formula [ Ni (Tyr) ]2·2H2O] ·H2O and Tyr are L-tyrosine negative ions; the unit structure of the Ni-MOF is composed of a Ni (II) ion center, two Tyr negative ions, two host water molecules and a guest water molecule.
3. The application of the graphene oxide @ chiral Ni-MOF hybrid material prepared by the preparation method of claim 1 in electrochemical sensing detection of penicillamine enantiomer.
4. The use of electrochemical sensing for the detection of the penicillamine enantiomer according to claim 3, comprising the steps of:
(1) preparation of graphene oxide @ chiral Ni-MOF sensor working electrode
Polishing a glassy carbon electrode with the diameter of 4 mm by using alumina powder, cleaning the surface by using water and ethanol, transferring 10 mu L of graphene oxide @ chiral Ni-MOF hybrid material solution to coat the glassy carbon electrode, and airing at room temperature to obtain a graphene oxide @ chiral Ni-MOF hybrid material modified sensor working electrode;
the graphene oxide @ chiral Ni-MOF hybrid material solution is prepared by blending 6 mg of graphene oxide @ chiral Ni-MOF hybrid material with 250 muL of ethanol, 720 muL of water and 30 muL of Nafion and performing ultrasonic treatment for 10-15 min;
(2) detection of L-and D-penicillamine enantiomers
Connecting the working electrode, the Ag-AgCl reference electrode and the platinum sheet counter electrode which are prepared in the step (1) to an electrochemical workstation to prepare a graphene oxide @ chiral Ni-MOF electrochemical chiral sensor;
at 0.1 mol. L-1The KOH solution is an electrolyte solution, a graphene oxide @ chiral Ni-MOF electrochemical chiral sensor is adopted, the current values of L-penicillamine and D-penicillamine standard solutions with different concentrations are respectively measured by adopting a differential pulse voltammetry method, and the L-penicillamine and D-penicillamine enantiomer working curves based on the graphene oxide @ chiral Ni-MOF electrochemical chiral sensor are drawn; and (3) replacing the standard solution of the L-penicillamine and the D-penicillamine with the solution of the sample to be detected, and detecting the content of the L-penicillamine and the D-penicillamine in the sample.
CN201910813212.4A 2019-08-30 2019-08-30 Preparation method and application of graphene oxide @ chiral Ni-MOF hybrid material Expired - Fee Related CN110483798B (en)

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CN110927135B (en) * 2019-12-25 2023-12-29 无锡市疾病预防控制中心 Method for rapidly and visually distinguishing different chiral penicillamine and racemic penicillamine in sample
CN111440286A (en) * 2020-03-12 2020-07-24 济南大学 Preparation method and application of chiral Co-MOF/CoSR/PU core-shell composite material
CN111413379A (en) * 2020-03-12 2020-07-14 济南大学 Preparation method and application of chiral Ni-MOF/NiSR core-shell composite material
CN113311036B (en) * 2021-05-23 2024-01-12 山东化工职业学院 MOFs/GO composite gas-sensitive material and preparation method and application thereof
CN113406183B (en) * 2021-06-29 2024-04-23 常州磐诺仪器有限公司 Method for efficiently identifying penicillamine chiral enantiomer based on ion mobility mass spectrometer

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