Spiro silver cluster luminescent cluster and preparation method and application thereof

A silver complex and spiro ring technology is applied to a type of spiro ring silver cluster luminescent cluster compound and the field of preparation and application thereof, which can solve the problems of limited application, low luminescence quantum yield, low luminescence color richness and the like, and achieves the The preparation method is simple and feasible, the raw materials are simple and easy to obtain, and the structure is stable.

Inactive Publication Date: 2018-12-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesized metal clusters often face the characteristics of insufficient stability, low luminescence quantum yield, and low richness of luminescence colors, which greatly limit their applications.

Method used

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  • Spiro silver cluster luminescent cluster and preparation method and application thereof
  • Spiro silver cluster luminescent cluster and preparation method and application thereof
  • Spiro silver cluster luminescent cluster and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1, spiro ring silver cluster compound A (R in formula I 1 ’-R 4 ' is -H, the silver ligand is formula (1), and R in the silver ligand 1 -R 6 is -H compound)

[0044] The structural unit of the spirocyclic silver cluster compound A is as follows:

[0045]

[0046] The preparation method is as follows:

[0047] 195.2 mg (1.0 mmol) of 2-(2-pyridyl) benzimidazole and 256.9 mg (1.0 mmol) of silver trifluoromethanesulfonate were premixed in a mixed solution of 4 ml of dichloromethane and 4 ml of methanol, and stirred at room temperature for 15 minutes; Add 23.4 mg (0.2 mmol) of 2-aminophenylacetylene, continue to stir at room temperature for 6 hours, and then volatile and diffuse in an ether atmosphere in the dark. After 2 days, a large number of yellow blocky crystals are obtained, with a yield of 75%.

[0048] Structural Confirmation:

[0049] (1) Determination of crystal structure

[0050] X-ray single crystal diffraction data of complex A on a single ...

Embodiment 2

[0056] Embodiment 2, spiro ring silver cluster compound B (R in formula I 1 ’-R 4 ' is -H, the silver ligand is formula (1), and R in the silver ligand 1 -R 6 is -H compound)

[0057] The structural unit of the spirocyclic silver cluster compound B is as follows:

[0058]

[0059] The preparation method is as follows:

[0060] 195.2 mg (1.0 mmol) of 2-(2-pyridyl) benzimidazole and 256.9 mg (1.0 mmol) of silver trifluoromethanesulfonate were premixed in a mixed solution of 4 ml of dichloromethane and 4 ml of methanol, and stirred at room temperature for 15 minutes; Add 33.34 mg (0.2 mmol) of 2-aminonaphthalene acetylene, continue to stir at room temperature for 6 hours, and then volatile and diffuse in an ether atmosphere in the dark. After 2 days, a large number of orange needle-shaped crystals are obtained, with a yield of 63%.

[0061] The preparation method of described 2-aminonaphthalene acetylene is as follows:

[0062] (1) Under a nitrogen atmosphere, 1.0748g (4...

Embodiment 3

[0072] Embodiment 3, the character of spiro ring silver cluster compound A \ B

[0073] Such as Figure 2-3 As shown, the spirocyclic silver cluster compound A emits green light under 365nm excitation before grinding, and the maximum emission wavelength is located at 533nm; after being ground into powder, it emits yellow light, and the maximum emission wavelength red shifts to 594nm. After the ground powder is fumigated with an organic solvent (such as methanol), the emission wavelength is blue-shifted to 533nm again, and green light is emitted.

[0074] Similar to the spirocyclic silver cluster compound A, the spirocyclic silver cluster compound B emits orange light before grinding, emits red light after grinding, and re-emits orange light after being fumigated with an organic solvent (such as methanol).

[0075] This kind of spirocyclic silver cluster compounds with color-changing and luminescent behaviors in response to pressure and solvent stimuli have potential research ...

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Abstract

The invention discloses a spiro silver cluster luminescent cluster and a preparation method and an application thereof. A structural general formula of the cluster is shown as a formula I. The spiro silver cluster provided by the invention has a stable structure, and the quantum yield can achieve 5% to 30%, appears the photochromic behavior of external stimulation (mechanical force and a solvent),and has potential application prospects in the fields of mechanical sensing, organic solvent vapor monitoring, and luminescent materials.

Description

technical field [0001] The invention relates to a class of spiro-ring silver cluster light-emitting clusters and a preparation method and application thereof. Background technique [0002] Metal nanoclusters are composed of several to dozens of atoms, a type of metal particles with a size between 0.5-10 nanometers and a narrow particle size distribution. Due to its large specific surface area, high surface coordination unsaturation and quantum size effect, it has many unique applications in catalysts, semiconductor devices, chemical and biological sensors, etc. In recent years, a class of monetary metal (Cu, Ag, Au) clusters derived from metal nanoclusters, due to their unique topological and composition) stimuli-responsive metal-metal, metal-ligand interactions lead to tunable photophysical properties, making it widely used in chemical sensing, bioimaging, light-emitting devices, etc. Compared with traditional organic or semiconductor quantum dots, this kind of metal clus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F1/10C09K11/06C09K9/02G01N21/64
CPCC07F1/005C09K9/02C09K11/06C09K2211/188G01N21/643
Inventor 赵亮吴晗
Owner TSINGHUA UNIV
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