Near-infrared electrochemiluminescence atom precision type silver nanocluster and preparation method and application thereof

A silver nanocluster, chemiluminescence technology, applied in the nano field, can solve the problems such as no atomic precise Ag nanocluster ECL, limited application, and atomic precise Au nanocluster instability, etc. The effect of chemical selectivity and anti-interference performance, wide application range and low cost

Active Publication Date: 2021-05-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the instability of the atomic number-precise Au nanoclusters used in the aqueous phase, the related ECL process is usually realized in the organic phase, which limits its further application.
[0004] At present, there is no practical technology and report on the realization and application of atomic number-accurate Ag nanocluster ECL process

Method used

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  • Near-infrared electrochemiluminescence atom precision type silver nanocluster and preparation method and application thereof
  • Near-infrared electrochemiluminescence atom precision type silver nanocluster and preparation method and application thereof
  • Near-infrared electrochemiluminescence atom precision type silver nanocluster and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method for regulating the electrochemistry and electrochemiluminescence process of silver nanoclusters, the steps are as follows:

[0062] (1) Take by weighing 0.02g silver nitrate, add 5mL methanol solution;

[0063] (2) Add 9 mL of dichloromethane solution to step (1), and stir for 5 min;

[0064] (3) Add 13.5 μL of 1,3-benzenedithiol solution to step (2), and stir for 5 minutes;

[0065] (4) Add 0.2g triphenylphosphine to step (3), add in the form of dichloromethane solution of triphenylphosphine;

[0066] (5) Add 0.011 g of sodium borohydride to step (4) in the form of an aqueous solution of sodium borohydride; stir and react at room temperature for 3 hours;

[0067] (6) After the reaction is completed, the Ag obtained in step (5) 29 (BDT) 12 (TPP) 4 The nanocluster solution was mixed with methanol, centrifuged, purified three times, the supernatant was discarded, and the precipitate was dissolved in N,N-dimethylformamide to obtain Ag 29 (BDT) 12 (TPP) 4 A...

Embodiment 2

[0077] Step is the same as Example 1, and difference is that in step (7) the Ag that will be purified 29 (BDT) 12 (TPP) 4 Dilute the nanoclusters to a monodisperse solution of 0.05 mg / mL, take 5 μL drop-coated on the bare glassy carbon electrode, take the bare glassy carbon electrode that has not been drip-coated as a blank sample, and place the dried electrode in 4 mL of nitrogen-saturated 0.1 In M phosphate buffer solution, the differential pulse voltammetry curve of the cathode was tested under the condition of 800V high voltage and three levels of amplification.

[0078] The cathode differential pulse voltammetry curve of the blank sample obtained in this embodiment Figure 8 shown by Figure 8 It can be seen that the blank sample obtained in Example 2 has no obvious reduction potential.

[0079] The Ag obtained in this embodiment 29 (BDT) 12 (TPP) 4 Cathode differential pulse voltammetry curves of nanoclusters Figure 9 shown by Figure 9 It can be seen that the ...

Embodiment 3

[0081] Step is the same as Example 1, and difference is that in step (7) the Ag that will be purified 29 (BDT) 12 (TPP) 4 Dilute the nanoclusters to a monodisperse solution of 0.05 mg / mL, take 5 μL drop-coated on the bare glassy carbon electrode, take the un-coated bare glassy carbon electrode as a blank sample, and place the dried electrode in 4 mL of 0.1M phosphate In the buffer solution, the differential pulse voltammetry curve of the anode was tested under the condition of 800V high voltage and three levels of amplification.

[0082] The anode differential pulse voltammetry curve of the blank sample obtained in this embodiment Figure 10 shown by Figure 10 It can be seen that the blank sample obtained in Example 3 has no obvious oxidation potential.

[0083] The Ag obtained in this embodiment 29 (BDT) 12 (TPP) 4 Anodic differential pulse voltammetry curves of nanoclusters Figure 11 shown by Figure 11 It can be seen that the Ag obtained in Example 2 29 (BDT) 1...

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Abstract

The invention belongs to the technical field of nanotechnology, and relates to a near-infrared electrochemiluminescence precise-atom-number silver nanocluster and a preparation method and application thereof. The Ag29(BDT)12(TPP)4 nanocluster is prepared by taking silver nitrate as a silver source, 1,3-benzene dithiol and triphenylphosphine as stabilizers, dichloromethane and methanol as solvents, N,N-dimethylformamide as a dispersing agent and sodium borohydride as a reducing agent. The method is a one-pot synthesis method, the required raw materials are cheap and easy to obtain, the synthesis device is simple, the conditions are mild, and the operation is safe. The obtained Ag29(BDT)12(TPP)4 nanocluster is good in monodispersity and good in stability, and can generate controllable electrochemical and electrochemiluminescence processes.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and relates to a silver nano-cluster with precise atomic number and a preparation method and application thereof with near-infrared electrochemiluminescence. Background technique [0002] Precise atomic number noble metal nanoclusters are composed of a certain number of central atoms and ligands, and have recognizable molecular structure and optical, electrical, physical and chemical properties (J.Am.Chem.Soc.2015,137,12906– 12913). Atomic number-precise noble metal nanoclusters have molecular size-limited noble metal atoms and discrete electronic energy levels, and have been used in catalysis (J.Am.Chem.Soc.2020, 142, 4141–4153), chemiluminescence (Angew.Chem. Int.Edit.2019,58,6276–6279), light energy conversion (Acc.Chem.Res.2016,49,1514–1523) and other fields show broad application prospects. [0003] Electrochemiluminescence (ECL), also known as electrochemiluminescence, is a process based on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/327G01N21/76
CPCG01N27/26G01N27/30G01N27/3278G01N21/76
Inventor 邹桂征高旭雯
Owner SHANDONG UNIV
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