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合成了一种新型的芴类衍生物2,7-二(3-(氰基)苯基)-9,9-二乙基芴。通过元素分析、红外(IR)、核磁共振(1H NMR)以及X射线单晶衍射对其组成和结构进行了表征。结果表明该化合物属于正交晶系,P空间群,晶胞参数:a=1.380 0(3)nm,b=2.230 6(4)nm,c=0.726 33(15)nm,α=β=γ=90°,V=2.235 8(8)nm3,Z=4,F(000)=896,μ=0.073 mm-1,S=1.013,R=0.046 9,wR=0.104 2。同时,我们对该化合物的紫外-可见吸收光谱和荧光光谱做了研究。在室温下,当激发光波长为330 nm时,该化合物的固态薄膜发射强烈的蓝色荧光,其发射波长为408 nm。此芴类衍生物在CH2Cl2溶液中的荧光量子效率为0.64,在固态薄膜中的斯托克斯位移为56 nm。该化合物有望成为一种优良的蓝色发光材料。
A novel fluorene derivative 2,7-bis (3- (cyano) phenyl) -9,9-diethylfluorene was synthesized. Its composition and structure were characterized by elemental analysis, infrared (IR), nuclear magnetic resonance (1H NMR) and single crystal X-ray diffraction. The results show that the compound belongs to orthorhombic system with P space group and unit cell parameters: a = 1.380 0 (3) nm, b = 2.230 6 (4) nm, c = 0.726 33 = 90 °, V = 2.235 8 (8) nm3, Z = 4, F (000) = 896, μ = 0.073 mm-1, S = 1.013, R = 0.046 9, wR = 0.104 2. At the same time, we studied the UV-Vis absorption and fluorescence spectra of this compound. At room temperature, when the excitation light wavelength is 330 nm, the solid film of the compound emits a strong blue fluorescence with an emission wavelength of 408 nm. The fluorene derivative has a fluorescence quantum efficiency of 0.64 in CH2Cl2 solution and a Stokes shift of 56 nm in a solid film. The compound is expected to become a good blue luminescent material.