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Synthesis method for fluorescent gold nano-cluster with color controllable through silver adjustment

A technology of fluorescent gold nanometer and synthesis method, which is applied in nanotechnology and other directions, can solve the problems of using toxic reagents, low fluorescence intensity, complicated experimental steps of multicolor metal nanoclusters, etc., and achieves the effect of simple steps and high fluorescence intensity.

Active Publication Date: 2018-01-09
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention synthesizes fluorescent metal nanoclusters with adjustable colors through silver regulation, which overcomes the disadvantages of single color of metal nanoclusters, complex experimental steps of multicolored metal nanoclusters, low fluorescence intensity, poor stability, and use of toxic reagents.

Method used

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  • Synthesis method for fluorescent gold nano-cluster with color controllable through silver adjustment
  • Synthesis method for fluorescent gold nano-cluster with color controllable through silver adjustment
  • Synthesis method for fluorescent gold nano-cluster with color controllable through silver adjustment

Examples

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Effect test

Embodiment 1～7

[0027] A method for synthesizing the color-controllable fluorescent gold nanoclusters regulated by silver, said method comprising the steps of:

[0028] (1) β-lactoglobulin solution (50mg / mL, 100μL) and sodium chloroaurate solution were mixed at room temperature, and the molar ratio was 2.72×10 -5 :1. After adjusting the pH of the mixed solution to 12, the red fluorescent gold nanoclusters were prepared after reacting in a shaker at 37° C. with a rotation speed of 120 rpm for 12 hours.

[0029] (2) Sodium chloroaurate solution (10mM, 100μL) and silver nitrate solution were added to the β-lactoglobulin solution (50mg / mL, 100μL) at the same time, the molar ratio of sodium chloroaurate and silver nitrate was 20:1, The pH of the mixture was adjusted to 12, and then reacted in a shaker at 37° C. with a rotation speed of 120 rpm for 12 hours to prepare yellow fluorescent gold nanoclusters.

[0030] (3) Continue to add silver nitrate solution to the prepared yellow fluorescent gold...

Embodiment 8～14

[0035] A method for synthesizing the color-controllable fluorescent gold nanoclusters regulated by silver, said method comprising the steps of:

[0036] (1) β-lactoglobulin solution (50mg / mL, 100μL) and sodium chloroaurate solution were mixed at room temperature, and the molar ratio was 2.72×10 -5 :1. After adjusting the pH of the mixed solution to 12, the red fluorescent gold nanoclusters were prepared after reacting in a shaker at 37° C. with a rotation speed of 120 rpm for 12 hours.

[0037] (2) Sodium chloroaurate solution (10mM, 100μL) and silver nitrate solution were added to the β-lactoglobulin solution (50mg / mL, 100μL) at the same time, the molar ratio of sodium chloroaurate and silver nitrate was 20:1, The pH of the mixture was adjusted to 12, and then reacted in a shaker at 37° C. with a rotation speed of 120 rpm for 12 hours to prepare yellow fluorescent gold nanoclusters.

[0038] (3) Continue to add silver nitrate solution to the prepared yellow fluorescent gold...

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Abstract

The invention provides a synthesis method for a fluorescent gold nano-cluster with color controllable through silver adjustment, belonging to the technical field of manufacture of fluorescent nano materials. According to the synthesis method, the fluorescent gold nano-cluster with controllable color is synthesized through silver adjustment, and the defects that a metal nano-cluster is single in color; testing procedures of a multicolor metal nano-cluster are complex; fluorescent intensity is low; stability is poor; toxic agents are used; and the like are overcome. Silver elements are introduced in synthesis of the fluorescent gold nano-cluster, and synthesis of the multicolor-adjustable fluorescent gold nano-cluster is realized by simply adjusting the adding amount and adding sequence of silver nitrate. Compared with the prior art, the synthesis method has the characteristics that the procedures are simple; the method is environment-friendly; and the fluorescent intensity is high.

Description

technical field [0001] The invention relates to a method for synthesizing color-controllable fluorescent gold nanoclusters regulated by silver, and belongs to the technical field of preparation of fluorescent nanomaterials. Background technique [0002] Fluorescent metal nanoclusters, usually composed of several to tens of atoms and with a size less than 2nm, have unique physical, chemical and optical properties. The excellent properties of fluorescent metal nanoclusters make them widely used in cell imaging, catalysis, sensing and other fields. In the past ten years, many templates such as DNA, amino acids, polymers, proteins, etc. have been successfully used in the synthesis of nanoclusters, among which proteins are widely used due to their good protection and rich functional groups. We found that β-lactoglobulin can be used as a protective and reducing agent to synthesize fluorescent gold nanoclusters. [0003] Photoluminescence is one of the important properties of flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 韩冰雁胡茜茜彭婷婷于明波李莹迟晨贺高红
Owner DALIAN UNIV OF TECH
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