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研究了两种新型芴类衍生物9,9_二(2_乙基已基)_2,7_二咔唑_9H_芴(简记为DCZF)和9,9_二(2_乙基已基)_2,7_二(2_(4_甲氧基)苯_2,1_乙烯基)芴(简记为BMOSF)在N,N_二甲基甲酰胺(DMF)中的线性吸收和单光子荧光行为,并用脉冲宽度为38ps,重复频率为10Hz的1064nmNd:YAG脉冲激光研究了两种化合物的三光子吸收性质.结果表明:两种新材料的最大线性吸收峰分别位于330和380nm,吸收区域覆盖了270—420nm波段.两种化合物的荧光带位于蓝_紫区,中心波长为369和442nm,都具有较小的斯托克斯位移.化合物DCZF和BMOSF的三光子吸收系数分别为γDCZF=6·78×10-20cm3/W2和γBMOSF=5·92×10-20cm3/W2.同时,两种新材料还表现出明显的三光子吸收光限幅效应,当入射光强分别为8和6GW/cm2时,非线性透过率分别达到30%和45%.
Two novel fluorene derivatives, 9,9-bis (2-ethylhexyl) _2,7-dicarbazole _9H_fluorene (abbreviated as DCZF) and 9,9- (2_ (4_methoxy) benzene_2,1_vinyl) fluorene (abbreviated as BMOSF) in N, N-dimethylformamide (DMF) And single-photon fluorescence, and the three-photon absorption properties of the two compounds were investigated by using 1064nm Nd: YAG pulsed laser with a pulse width of 38ps and a repetition frequency of 10Hz.The results showed that the maximum linear absorption peaks of the two novel materials were at 330 and 380nm , The absorption region covers the band of 270-420nm.The fluorescence bands of the two compounds are located in the blue-violet region, the central wavelength of 369 and 442nm, have a smaller Stokes shift.The three-photon absorption coefficient of the compounds DCZF and BMOSF ΓDCZF = 6 · 78 × 10-20cm3 / W2 and γBMOSF = 5 · 92 × 10-20cm3 / W2. At the same time, the two new materials also showed obvious three-photon absorption limiting effect. When the incident light intensities were 8 and 6GW / cm2, the nonlinear transmittance of 30% and 45% respectively.