Small-molecular luminescent material based on trispirocyclic acridine donor unit and preparation method and application thereof
A technology of triple spiro acridine and luminescent materials, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., which can solve the problems of less and less heat-activated delayed fluorescent materials, and improve the light output coupling constant , easy to purify, and improve the effect of carrier transport characteristics
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Embodiment 1
[0058] Preparation of a non-conjugated end group containing a heteroatom sulfur-containing triple spiro acridine donor unit (a) of this embodiment:
[0059] (1) Preparation of intermediate 1-1:
[0060] After adding (2-bromophenyl)(phenyl)sulfane (5.3 g, 20 mmol) into a 250 mL three-necked flask, 150 mL of dry tetrahydrofuran was added. The mixture solution was cooled to -78°C and then degassed for 20 minutes. After that, 8.8 mL of n-butyllithium (2.5 mmol mL -1 ), kept stirring at -78°C for 1 hour, dissolved anthracene-9,10-dione (3.33g, 16mmol) in 50mL of anhydrous tetrahydrofuran, and added dropwise to the above low-temperature solution with a syringe. After the dropwise addition, continue to stir at this temperature for 1 hour, then raise the temperature to room temperature and stir for 4 hours. Then the mixture solution was treated with 5mL methanol and 10mL dilute hydrochloric acid (1mmolmL -1 ) was quenched, and then 100 ml of deionized water was added. and extract...
Embodiment 2
[0076] The preparation of a non-conjugated end group containing fluorene unit triple spiro acridine donor unit (b) of this embodiment:
[0077] (1) Preparation of intermediate 2-1:
[0078] After adding 2-bromo-1,1'-biphenyl (4.7 g, 20 mmol) into a 250 mL three-necked flask, 150 mL of dry tetrahydrofuran was added. The mixture solution was cooled to -78°C and then degassed for 20 minutes. After that, 8.8 mL of n-butyllithium (2.5 mmol mL -1), kept stirring at -78°C for 1 hour, dissolved anthracene-9,10-dione (3.33g, 16mmol) in 50mL of anhydrous tetrahydrofuran, and added dropwise to the above low-temperature solution with a syringe. After the dropwise addition, continue to stir at this temperature for 1 hour, then raise the temperature to room temperature and stir for 4 hours. Then the mixture solution was treated with 5mL methanol and 10mL dilute hydrochloric acid (1mmolmL -1 ) was quenched, and then 100 ml of deionized water was added. And extracted three times with dic...
Embodiment 3
[0094] Preparation of a triple-spiro acridine donor unit (c) whose end group contains a non-conjugated sulfone group in this embodiment:
[0095] The reaction equation is as follows:
[0096]
[0097] Intermediate (a) (1.05 g, 2 mmol) was dissolved in 150 ml of glacial acetic acid and purged with nitrogen for 20 minutes. Finally, the mixture solution was heated to 80° C., stirred for 10 minutes, and then 5 ml of hydrogen peroxide was added. The reaction was carried out at this temperature for 8 hours. The reaction was stopped, and the glacial acetic acid solvent was distilled off under reduced pressure. Column chromatography petroleum ether / dichloromethane (2:1) obtained a light yellow solid EI-MS (m / z): calcdfor C 38 h 25 NSO 2 ; Molecular weight: 559.16; found: 559.32, [M + ].
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