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Au25 nanosphere synthetic method and Au25 nanospheres

A technology of nanospheres and au25, which is applied in the field of nanomaterials, can solve problems such as difficult synthesis, achieve the effects of easy purification, simple and convenient synthesis route, and improved activity and catalytic performance

Inactive Publication Date: 2017-06-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of atomic clusters with precise structures requires elaborate experimental schemes, and the synthesis is relatively difficult under the condition of imperfect technology

Method used

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  • Au25 nanosphere synthetic method and Au25 nanospheres
  • Au25 nanosphere synthetic method and Au25 nanospheres
  • Au25 nanosphere synthetic method and Au25 nanospheres

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: stirring speed 1000rpm

[0023] A Simple and Efficient Synthesis of Au 25 (2-NapS) 18 A method for synthesizing nanoclusters, specifically comprising the following steps:

[0024] (1) Weigh 68 mg of HAuCl 4 ·3H 2 O is placed in a 50ml three-necked round-bottomed flask as a reaction raw material, dissolved in 15ml of acetone, added with 104.6mg of tetra-n-octylammonium bromide (TOAB), stirred for 30min, until the color of the solution changes from golden yellow to orange After turning red, weigh 79.5mg of 2-naphthylthiol mercapto ligand, and when the color of the solution becomes lighter and lighter, weigh 62.4mg of sodium borohydride and dissolve it in 3ml of ice water. After shaking and dissolving, slowly dissolve the sodium borohydride solution Add it into the above-mentioned three-neck flask, control the stirring time at 1000 rpm for 5-6 hours, then stop the reaction, spin the reaction system to dryness, wash the solid with methanol, then extract it...

Embodiment 2

[0026] Embodiment 2: stirring speed 700rpm

[0027] (1) Weigh 68 mg of HAuCl 4 ·3H 2 O is placed in a 50ml three-necked round-bottomed flask as a reaction raw material, dissolved in 15ml of acetone, added with 104.6mg of tetra-n-octylammonium bromide (TOAB), stirred for 30min, until the color of the solution changes from golden yellow to orange After turning red, weigh ~9.5mg of 2-naphthylthiol mercapto ligand, and when the color of the solution becomes lighter and lighter, weigh 62.4mg of sodium borohydride and dissolve it in 3ml of ice water. After shaking to dissolve, slowly dissolve Add the sodium borohydride solution into the three-necked flask above, control the stirring time at 1000rpm for 5-6 hours, then stop the reaction, spin the reaction system to dryness, wash the solid with methanol, then extract it with acetonitrile, remove insolubles by centrifugation, and dry the acetonitrile solution to obtain crude product.

[0028] (2) Place all the crude product synthesi...

Embodiment 3

[0030] Example 3: Changing the dissolved NaBH 4 The solvent is ethanol

[0031] (1) Weigh 68 mg of HAuCl 4 ·3H 2O is placed in a 50ml three-necked round-bottomed flask as a reaction raw material, dissolved in 15ml of acetone, added with 104.6mg of tetra-n-octylammonium bromide (TOAB), stirred for 30min, until the color of the solution changes from golden yellow to orange After turning red, weigh 79.5 mg of 2-naphthylthiol mercapto ligand, and when the color of the solution becomes lighter and lighter, weigh 62.4 mg of sodium borohydride and dissolve it in 3 ml of absolute ethanol. After shaking and dissolving, slowly Add the sodium borohydride solution into the three-neck flask above, control the stirring time at 1000rpm for 5-6 hours, then stop the reaction, spin the reaction system to dryness, wash the solid with methanol, then extract it with acetonitrile, remove insoluble matter by centrifugation, and dry the acetonitrile solution A crude product was obtained.

[0032]...

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Abstract

Preparation and synthesis of Au25 nanospheres with precise atom number and structure; a preparation method may synthesize the Au25 nanospheres simply and efficiently and may also serve for preparing a supported catalyst and for catalyzing organic reactions, such as Sonogashira coupling reaction. These gold cluster nanomaterials have precise microscopic structure. A synthetic method includes: dissolving chloroauric acid trihydrate (HAuCl4.3H2O) and tetraoctyl ammonium bromide (TOABr) in acetone, adding suitable 2-naphthalenethiol (2-NapSH) ligand, adding a strong reducing agent sodium borohydride for reduction, adding massive 2-naphthalenethiol at suitable temperature to allow for etching reaction to obtain the product Au25(2-NapS)18. The synthetic route related herein has the advantages that the materials are simple and easily accessible, reaction conditions are simple and feasible, and controlling is simple.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to the simple and efficient synthesis and preparation of a class of gold atom clusters with precise atomic numbers. Background technique [0002] Atomically precise gold nanoclusters, as a new type of functional material, have been widely studied in recent years, because the size and shape of gold nanoclusters make them very different from gold atoms, gold nanoparticles and gold nuggets in terms of optical and electrical properties. There is a big difference, and it has great potential value in the fields of new catalysis, sensors and biology. (Acc. Chem. Res., 2014, 47, 816. Acc. Chem. Res., 2013, 46, 1749. Nanoscale, 2012, 4, 4087. Anal. Chem., 2015, 87, 216. ACS Nano, 2014, 8, 139. J .Catal.,2013,306,177.Nanoscale,2010,2,343.) Gold nanoclusters (Au n L m , where L, n and m are organic protective ligands, the number of gold atoms and the number of ligand...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 李杲林计志颜春阳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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