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A kind of organic fluorescent polydopamine nano particle solution and its preparation method and application

A polydopamine and nanoparticle technology is applied in the fields of chemistry and biological sciences to achieve the effect of a simple preparation method

Inactive Publication Date: 2021-04-23
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an organic fluorescent polydopamine nanoparticle solution and its preparation method and application, which overcomes the two-step operation of oxygen oxidation and hydrogen peroxide oxidation and the technology brought by the use of oxygen and hydrogen peroxide when preparing the fluorescent polydopamine nanoparticle solution in the prior art Defects, aiming to provide a simpler, more convenient and environmentally friendly new preparation method of organic fluorescent polydopamine nanoparticles solution and expand the application of organic fluorescent polydopamine nanoparticles

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  • A kind of organic fluorescent polydopamine nano particle solution and its preparation method and application
  • A kind of organic fluorescent polydopamine nano particle solution and its preparation method and application
  • A kind of organic fluorescent polydopamine nano particle solution and its preparation method and application

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Embodiment 1

[0030] An organic fluorescent polydopamine nanoparticle solution, which is prepared through the following steps:

[0031] S1. Dissolving dopamine in the dopamine solution in the Tris-HCl buffer solution with a pH of 5, the concentration of the dopamine aqueous solution is 0.01g / mL, that is, 64mM;

[0032] S2. Add 40 μL of ammonium persulfate aqueous solution with a concentration of 50 mM to 1000 μL of dopamine aqueous solution and fully mix to obtain a reaction solution. In the reaction solution, dopamine, ammonium persulfate and H 2 o 2 The ratio of the amount of substance is about 64:2;

[0033] S3. The reaction solution was reacted at 65°C for 3 hours, then put into a dialysis bag with a molecular weight cut-off of 100-500Da, and dialyzed for 40 hours to obtain the product.

Embodiment 2

[0035] An organic fluorescent polydopamine nanoparticle solution, which is prepared through the following steps:

[0036] S1. Dissolving dopamine in the dopamine solution in the Tris-HCl buffer solution with a pH of 2, the concentration of the dopamine aqueous solution is 0.005g / mL, that is, 32mM;

[0037] S2. Add 20 μL of sodium persulfate aqueous solution with a concentration of 60 mM to 1000 μL of dopamine aqueous solution and fully mix to obtain a reaction solution. In the reaction solution, dopamine, sodium persulfate and H 2 o 2 The ratio of the amount of the substance is about 32:1.2;

[0038] S3. The reaction solution was reacted at 20°C for 6 hours, then put into a dialysis bag with a molecular weight cut-off of 100-500Da, and dialyzed for 48 hours to obtain the product.

Embodiment 3

[0040] An organic fluorescent polydopamine nanoparticle solution, which is prepared through the following steps:

[0041] S1. Dissolving dopamine in the dopamine solution in Tris-HCl buffer solution with a pH of 7, the concentration of the dopamine aqueous solution is 0.003g / mL, that is, about 20mM;

[0042] S2. Adding 125 μL concentration of 40 mM potassium persulfate aqueous solution to 1000 μL dopamine aqueous solution and fully mixing to obtain a reaction solution, dopamine, potassium persulfate and H in the reaction solution 2 o 2 The ratio of the amount of the substance is about 20:5;

[0043] S3. The reaction solution was reacted at 80°C for 2 hours, then put into a dialysis bag with a molecular weight cut-off of 100-500Da, and dialyzed for 36 hours to obtain the product.

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Abstract

The present invention relates to a kind of preparation method of organic fluorescent polydopamine nano particle solution, it comprises the following steps: S1. dissolving dopamine in pH is the dopamine solution in the acid-base buffer solution of 2-7; S2. adding inorganic The aqueous solution of the oxidizing agent is mixed to obtain a reaction solution; S3. The reaction solution is reacted at 20-80°C for 2-6 hours, put into a dialysis bag with a molecular weight cut-off of 100-500Da, and dialyzed for 36-48 hours to obtain the product. The beneficial effects are that the present invention provides a brand-new method for preparing an organic fluorescent polydopamine nanoparticle solution, by selecting an appropriate inorganic oxidant aqueous solution and mixing it with a dopamine solution, and the organic fluorescent polydopamine nanoparticle can be prepared in one step, and the preparation method is simple ; The organic fluorescent polydopamine nanoparticle solution prepared by the present invention can be used to detect the concentration of ferrous ions in the solution, and can be used to indicate the pH of the solution.

Description

technical field [0001] The invention belongs to the technical field of chemistry and biological sciences, and in particular relates to an organic fluorescent polydopamine nanoparticle solution and a preparation method and application thereof. Background technique [0002] Organic fluorescent nanomaterials have outstanding advantages in biodegradation, biocompatibility and photostability. Dopamine is a neurotransmitter, the chemical used to help cells transmit impulses, and is found throughout the body. Dopamine is a small molecule that easily undergoes self-polymerization under oxygen conditions. It is a very attractive and promising material to prepare organic fluorescent nanomaterials. [0003] So far, there are relatively few reports on the synthesis of fluorescent polydopamine nanomaterials. In the reported literature, a two-step method is generally used for synthesis. The first step: dopamine is oxidized into large polydopamine nanoparticles by oxygen in water under ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64C08G73/06B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C08G73/0672G01N21/643
Inventor 熊华玉王升富张修华文为王鑫许佳青
Owner HUBEI UNIV
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