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.
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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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