Method for preparing water-soluble glowing metal clusters of platinum, gold, silver and copper and application

A metal platinum, water-soluble technology, applied in the field of preparation of luminescent metal clusters, can solve the problems of limited widespread adoption, complex preparation process, lack of versatility, etc., and achieve the effects of fast conditions, uniform size distribution, and good luminous efficiency

Inactive Publication Date: 2016-09-28
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal clusters with excellent physical and chemical properties can be obtained by specific methods, they are only limited to a particular metal (such as Au), and other luminescent metal clusters (such as Ag, Cu, Pt, etc.) cannot be synthesized by this method. ), which lacks a certain degree of versatility, which is not conducive t

Method used

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  • Method for preparing water-soluble glowing metal clusters of platinum, gold, silver and copper and application
  • Method for preparing water-soluble glowing metal clusters of platinum, gold, silver and copper and application
  • Method for preparing water-soluble glowing metal clusters of platinum, gold, silver and copper and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of histidine-stabilized platinum clusters:

[0018] a. Add 1 mL of 0.01 mol / L platinum chloride aqueous solution to a mixture of 1 mL of 0.1 mol / L histidine aqueous solution and 8 mL of deionized water and stir for 30 minutes at a stirring speed of 300 rpm to obtain a mixed solution;

[0019] b. Add 0.1 mol / L ascorbic acid to the mixed solution in step a, continue to stir and react at a temperature of 40° C. for 10 hours, and the stirring speed is 300 rpm to obtain platinum clusters with an average particle size of 1.9 nm;

[0020] Detection of iron ions:

[0021] Prepare a group of Fe with different concentrations 2 (SO 4 ) 3 Aqueous solution, pH=4, the concentration of the prepared solution is from 0.1mmol·L -1 to 100mmol·L -1 ranging;

[0022] Take a group of 2mL prepared platinum cluster solutions, add different concentrations of Fe 2 (SO4) 3 1 μL of aqueous solution, and record the fluorescence emission spectrum of platinum clusters after each a...

Embodiment 2

[0024] Preparation of histidine-stabilized gold clusters:

[0025] a. Add 1 mL of 0.01 mol / L chloroauric acid aqueous solution to a mixture of 1 mL of 0.1 mol / L histidine aqueous solution and 8 mL of deionized water and stir for 1 minute at a stirring speed of 300 rpm to obtain a mixed solution;

[0026] b. Add 0.1 mol / L ascorbic acid to the mixed solution in step a, continue stirring and reacting at a temperature of 25° C. for 15 minutes at a stirring speed of 300 rpm to obtain gold clusters with an average particle size of 1.8 nm;

[0027] Detection of iron ions:

[0028] Prepare a group of Fe with different concentrations 2 (SO 4 ) 3 Aqueous solution, pH=4, the concentration of the prepared solution is from 0.1mmol·L -1 to 100mmol·L -1 ranging;

[0029] Take a group of 2mL prepared gold cluster solutions, add different concentrations of Fe 2 (SO 4 ) 3 1 μL of aqueous solution, and record the fluorescence emission spectrum of gold clusters after each addition of fer...

Embodiment 3

[0031] Preparation of histidine-stabilized silver clusters:

[0032] a. Add 1 mL of 0.01 mol / L silver nitrate aqueous solution to a mixture of 1 mL of 0.1 mol / L histidine aqueous solution and 8 mL of deionized water and stir for 60 minutes at a stirring speed of 300 rpm to obtain a mixed solution;

[0033] b. Add 0.1mol / L ascorbic acid to the mixed solution in step a, continue to stir and react at a temperature of 35°C for 4 hours, and the stirring speed is 300rpm, to obtain silver clusters with an average particle size of 1.3nm;

[0034] Detection of iron ions:

[0035] Prepare a group of Fe with different concentrations 2 (SO 4 ) 3 Aqueous solution, pH=4, the concentration of the prepared solution is from 0.1mmol·L -1 to 100mmol·L -1 ranging;

[0036] Take a group of 2mL prepared silver cluster solutions, add different concentrations of Fe 2 (SO4) 31 μL of aqueous solution, and record the fluorescence emission spectrum of silver clusters after each addition of ferric...

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Abstract

The invention relates to a method and application for preparing water-soluble luminescent metal clusters of platinum, gold, silver and copper. This method uses the biomolecule histidine as a stabilizer and ascorbic acid as a reducing agent to prepare four metal clusters with photoluminescent properties of platinum, gold, silver and copper. This method is non-toxic and harmless, and the conditions are mild and fast. , the size distribution of the generated metal clusters is uniform, the particle size is 1-2 nm, and it has good luminous efficiency. The luminous efficiencies of metal platinum, gold, silver, and copper clusters prepared by the method of the present invention are 2.93%, 13.1%, 6.97%, and 8.26%, respectively, and have high selective response to aqueous phase iron ions, and the fluorescence intensity will decrease. Significantly decreased with the increase of iron ion concentration. The linear response ranges to iron ion concentration are 0.05-110μmol/L, 5-125μmol/L, 2.5-500μmol/L and 0.5-100μmol/L, respectively. It can be used as a high-sensitivity fluorescent probe for iron ions in the field of biological detection. It has good application prospect in iron ion detection sensor.

Description

technical field [0001] The invention relates to an environment-friendly and general preparation method of luminescent metal clusters, through which water-soluble platinum, gold, silver and copper cluster materials can be obtained. These metal nanoclusters have good photoluminescent properties and can be used in applications such as fluorescence detection, imaging, and labeling. Background technique [0002] Metal clusters are substances composed of several to hundreds of metal atoms. They not only have some molecular-like properties, but also have many characteristics of nanomaterials. They are a new type between molecules and nanomaterials. level. Because of this unique characteristic, metal clusters have attracted extensive attention of researchers in recent years. Luminescent metal clusters (generally no more than 30 atoms) are one of the most concerned clusters, which are characterized by extremely small size (generally less than 2nm in particle size) and excellent pho...

Claims

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Application Information

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IPC IPC(8): B22F9/24C09K11/87C09K11/58B82Y40/00
CPCB22F9/24B82Y40/00C09K11/58C09K11/87
Inventor 王传义周劭臣王富
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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