Organic luminescent material and preparation method and application thereof
A luminescent material and organic technology, applied in the field of materials science, can solve the problems of high cost, complex synthesis route, low luminous efficiency, etc., and achieve the effects of fewer synthesis steps, simple synthesis method, high luminous efficiency and luminous intensity
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Embodiment 1
[0040] Embodiment 1 (synthesis of organic luminescent material):
[0041] (1) Synthesis of compound I-1
[0042]
[0043] The specific preparation steps are as described in literature (M. Banerjee, et al., J. Org. Chem., 2007, 72, 8054-8061).
[0044] Diphenylmethane (3.53g, 21.0mmol) was dissolved in 20mL of anhydrous tetrahydrofuran, cooled to 0°C, 1.6M n-butyllithium / n-hexane solution (12.5mL, 20.0mmol) was added dropwise, and after stirring for 30min, the system was Orange red, then cooled to -78°C, a solution composed of 4-bromo-benzophenone (5.22g, 20.0mmol) and 15mL of anhydrous tetrahydrofuran was added dropwise to the system, stirred at -78°C for 3h, and then warmed to room temperature , stirred for 16h. Add 20 mL of saturated ammonium chloride aqueous solution to quench the reaction, let stand to separate layers, extract the aqueous phase with dichloromethane (30 mL×3), wash the combined organic phase with saturated brine (20 mL×2), and add anhydrous magnesium s...
Embodiment 2
[0065] Example 2 (organic luminescent material TPE-NTZ-B piezochromic properties):
[0066] The compound TPE-NTZ-B obtained above was fully ground in an agate mortar, and compared with the unground compound, it was found that its red color became lighter; with 500nm as the excitation wavelength, the solid fluorescence emission spectrum before and after grinding was tested, and the results were as follows figure 1 shown. The maximum emission wavelength of the solid before grinding is located at 623nm, and the maximum emission wavelength of the solid after grinding is blue-shifted to 610nm. It shows that the organic luminescent material has piezochromic performance.
Embodiment 3
[0067] Example 3 (organic luminescent material TPE-NTZ-TPE-1 piezochromic properties):
[0068] The compound TPE-NTZ-TPE-1 obtained above was fully ground in an agate mortar. Compared with the unground compound, it was found that its color changed from orange to red, and the change was very obvious; with 506nm as the excitation wavelength, the test before and after grinding The solid-state fluorescence emission spectrum, the results are as follows figure 2 shown. The maximum emission wavelength of the solid before grinding is located at 598nm, and the maximum emission wavelength of the solid after grinding is red-shifted to 612nm. It shows that the organic luminescent material has piezochromic performance.
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