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Thiacalixarene derivative aqueous-phase nano gold granule preparation method

A technology of nano-gold particles and thiocalixarene, which is applied in the field of preparation of nano-gold particles in the aqueous phase of thiocalixarene derivatives, can solve the problems of poor stability of nano-gold particles, and achieves a simple method, good controllability, The effect of simple process

Inactive Publication Date: 2009-02-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a stabilizer, carboxyl-containing groups do not have a good stabilizing effect on gold nanoparticles. Therefore, in future studies, nitrogen-containing, sulfur-containing or phosphorus-containing ligands are mostly used to coordinate with reduced gold nanoparticles to stabilize them.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Weigh 25 mg of thiocalix[4]arene monomethylpolyethylene glycol derivatives (monomethylpolyethylene glycol modified thiocalix[4]arene lower end phenolic hydroxyl derivatives, monomethylpolyethylene glycol The molecular weight of ethylene glycol is 550), and its structural formula is as figure 1 shown. Add 100 ml of deionized water, stir to dissolve, and prepare a 0.25 mg / ml solution, the solution has white opalescence.

[0026] 2) Prepare a 10 mg / ml aqueous solution of chloroauric acid. Take a drop of chloroauric acid aqueous solution (about 15 drops in 1 milliliter) with a dropper, and add it to 12 milliliters of 0.25 mg / ml thiocalix[4]arene monomethyl polyethylene glycol derivative aqueous solution, stir at room temperature 1 hour, left for about 10 hours, the solution turned pink. The thioether bond of polyethylene glycol in thiocalixarene and the gold in chloroauric acid are calculated according to the amount of substances, and the ratio of substances is 1:0.21...

Embodiment 2

[0028] 1) Preparation of thiocalix[4]arene monomethylpolyethylene glycol derivative aqueous solution and chloroauric acid aqueous solution according to Example 1.

[0029] 2) Get a drop of chloroauric acid aqueous solution (1 milliliter is about 15 drops) with dropper, join in the thiocalix [4] arene monomethyl polyethylene glycol derivative aqueous solution of 0.25 mg / ml in 8 milliliter concentration, Stir at room temperature for 1 hour, and leave it for about 7 hours, the solution turns pink. The thioether bond of polyethylene glycol of thiocalixarene and the gold of chloroauric acid are calculated according to the amount of substances, and the ratio of S / Au substances is 1:0.31.

Embodiment 3

[0031] 1) Prepare thiocalix[4]arene monomethylpolyethylene glycol derivative aqueous solution and chloroauric acid aqueous solution according to Example 1.

[0032] 2) Take a drop of chloroauric acid aqueous solution (about 15 drops in 1 milliliter) with a dropper, and join 4 milliliters of concentrations in the aqueous solution of thiocalix[4]arene monomethyl polyethylene glycol derivatives of 0.25 mg / ml, Stir at room temperature for 1 hour, and stand for about 5 hours, the solution turns wine red. The thioether bond of polyethylene glycol of thiocalixarene and the gold of chloroauric acid are calculated according to the amount of substances, and the ratio of S / Au substances is 1:0.6.

[0033] The results are shown in the attached figure, figure 2 and image 3 The shape and size of the prepared gold nanoparticles were characterized by two different testing methods.

[0034] figure 2 Transmission electron micrographs, in which, 1 drop of 10 mg / ml chloroauric acid solutio...

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Abstract

The invention provides a method for preparing nanometer gold grains by the water phase of phosphorothioate calixarene derivatives in the field of nanometer technology. The procedures are that an amphiphilic phosphorothioate calixarene polyethylene glycol derivative is dissolved in deionized water so as to prepare a phosphorothioate calixarene polyethylene glycol derivative water solution. Chloroauric acid water solution is taken to be added into the phosphorothioate calixarene polyethylene glycol derivative water solution, and stirred under the room temperature; then the solution is placed for a while to obtain the nanometer gold grains with different sizes, wherein, the thioether bond of polyethylene glycol of phosphorothioate calixarene and the gold of the chloroauric acid are calculated according to the amount of substance, with the molar ratio of 1:0.6-1:0.21. The nanometer gold grains of a few to tens of nanometers can be obtained by the method for preparing nanometer gold grains by the water phase of phosphorothioate calixarene derivatives; the technique is simple; the stability of the synthesized nanometer gold grain is good; simultaneously, calixarene is capable of identifying a plurality of guest molecules as a superamolecular body; nanometer gold grains stably coated by phosphorothioate calixarene can be applied to devices for preparing bio-sensor, molecule detection, and biocatalysis, etc.

Description

technical field [0001] The invention relates to a method for preparing nano-gold particles in the field of nanotechnology, in particular to a method for preparing nano-gold particles in an aqueous phase of thiocalixarene derivatives. Background technique [0002] Due to its unique quantum size effect and high specific surface area, gold nanoparticles have been widely used in the fields of light, electricity, magnetism, catalysis and biotechnology. [0003] At present, the chemical preparation methods of gold nanoparticles include solution reduction method, seed gold growth method, etc. Among them, the direct reduction method of chloroauric acid solution has become the most commonly used chemical preparation method for synthesizing stable gold nanoparticles. When using this method to synthesize gold nanoparticles, a suitable reducing agent needs to be used. The reducing agents that have been reported include sodium borohydride, trisodium citrate, ascorbic acid, hydrazine hydr...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 屠春来余鑫王瑞斌朱新远颜德岳
Owner SHANGHAI JIAO TONG UNIV
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