N-alkyl group-3, 6-di-(2-quinoline) vinyl) carbazole and preparation method thereof

[0026] Specific embodiment one: the N-alkyl-3 of the present embodiment, the structural formula of 6-two [(2-quinoline) vinyl] carbazole is as follows:

[0027]

[0028] Among them, R is C n h 2n+1 Or benzyl, n is 1-8.

[0029] The N-alkyl-3,6-bis[(2-quinoline)vinyl]carbazole of the present embodiment is that the electron acceptor group is connected to both sides of the carbazole ring at the 3,6 position, and the 3, 6-diformyl-N-alkyl-carbazole derivatives and 2-methylquinoline are produced by Knoevenagel Reaction under the condition of acetic anhydride as condensing agent. It can produce fluorescence phenomenon under the irradiation conditions of 365nm of ordinary 8 watts and 254nm low-energy ultraviolet wavelength of 6 watts, and the N-alkyl-3,6-bis[(2-quinoline)ethylene of this embodiment Base] carbazole has good thermal stability and photochemical stability, and can undergo two-photon absorption phenomenon under 800nm ​​femtosecond laser, and can be excited to produce f

[0030] Specific embodiment two: N-alkyl-3 of the present embodiment, the preparation method of 6-two [(2-quinoline) vinyl] carbazole is carried out according to the following steps: 1. Weigh 1% by mass percentage ~3% of 3,6-diformyl N-alkyl-carbazole, 5%~7% of 2-methylquinoline and 90%~94% of acetic anhydride; , mix 6-diformyl-N-alkyl-carbazole and 2-methylquinoline evenly, then add the acetic anhydride weighed in step 1, stir evenly, heat to 100°C~140°C, and keep for 24~ 72h, cooled to room temperature to obtain the reaction solution; 3. Mix the reaction solution obtained in step 2 with water in a volume ratio of 1:2 to obtain the initial mixed solution; then use a concentration of 10-25mol / L alkaline The solution adjusts the pH value of the initial mixed solution to 7.0 to obtain a mixed solution; 4. Extract the mixed solution obtained in step 3 with dichloromethane, collect the extract, and use a rotary evaporator to store the extract at a temperature of 50°C to 70°C Carry

[0034] Embodiment 3: This embodiment is different from Embodiment 2 in that: the water described in step 3 is pure water. Others are the same as in the second embodiment.