A Method for Synthesizing Ultrastable and Highly Fluorescent Copper Nanoclusters Based on Metal-Organic Frameworks
A technology of fluorescent copper nanoclusters and metal organic frameworks, applied in the field of preparation of fluorescent nanomaterials, can solve the problems of complex synthesis steps, low fluorescence intensity, and poor stability of copper nanoclusters
Active Publication Date: 2021-04-20
DALIAN UNIV OF TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The invention synthesizes ultra-stable and high-fluorescence copper nanoclusters based on metal-organic frameworks in one step, which overcomes the disadvantages of copper nanoclusters such as poor stability, low fluorescence intensity, and complicated synthesis steps.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～4
[0027] A method for synthesizing ultra-stable and highly fluorescent copper nanoclusters based on a metal-organic framework, the method comprising the steps of:
[0028] (1) At room temperature, dissolve zinc nitrate hexahydrate (0.831g) and terephthalic acid in 20mL of N, N dimethylformamide solvent, the mass ratio of zinc nitrate hexahydrate and terephthalic acid is 4.5: 1.
[0029] (2) at room temperature, glutathione solution (5mL, 50mM) and copper nitrate trihydrate solution are added in the mixed solution of step (1) gained, and the mol ratio of glutathione and copper nitrate trihydrate is 5: 1. Stir the mixed solution evenly, adjust the pH of the mixed solution to 5, and react at room temperature for 24 h. See Table 1 for the different pH values of Examples 1-4.
[0030] UV absorption spectrum ( figure 2 ) has no obvious absorption peak at 500–600 nm, indicating that fluorescent copper nanoclusters rather than copper nanoparticles were successfully synthesized in...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of preparation of fluorescent nanomaterials, and provides a method for synthesizing ultra-stable and highly fluorescent copper nanoclusters based on metal-organic frameworks. The steps are as follows: at room temperature, zinc nitrate hexahydrate and terephthalic acid are dissolved in N, In N-dimethylformamide solvent, control the mass ratio of zinc nitrate hexahydrate and terephthalic acid to 3-5:1; at room temperature, add glutathione solution and copper nitrate trihydrate solution to the above mixed solution , stir evenly, adjust the pH of the mixture to 2-12, and react at room temperature for 15-30 hours; control the molar ratio of glutathione and copper nitrate trihydrate to 1-6:1. The invention grows the metal organic framework and the copper nanocluster simultaneously, so that the porous metal organic framework material can protect the fluorescent copper nanocluster from being oxidized, thereby greatly improving the stability of the copper nanocluster. On the other hand, the aggregation-inducing effect produced by metal-organic frameworks improves the quantum yield of copper nanoclusters.
Description
technical field [0001] The invention relates to a method for synthesizing ultra-stable and high-fluorescence copper nanoclusters based on a metal-organic framework, and belongs to the technical field of preparation of fluorescent nanomaterials. Background technique [0002] Metal nanoclusters, generally composed of a few to dozens of metal atoms, with a size smaller than the Fermi wavelength of electrons, have attracted extensive attention as an emerging nanomaterial. Due to the size effect of electrons, metal nanoclusters have excellent physical / chemical and optical properties. Photofluorescence is an important property in the UV-vis region compared to larger metal nanoparticles. In addition to the noble metals gold and silver, cheap, nontoxic, and abundant copper nanoclusters have also been extensively studied. However, weak stability and low quantum yield are the main challenges in the current synthesis of fluorescent copper nanoclusters because copper is more active an...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/58B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09K11/025C09K11/58
Inventor 韩冰雁胡茜茜闫琴姜静美贺高红
Owner DALIAN UNIV OF TECH