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通过两步反应合成了一种带有新型电子给体的D-π-A型三腈基呋喃衍生物(DCDHF-2-V),并采用旋涂法制备出与聚甲基丙烯酸甲酯(PMMA)共混均匀的聚合物薄膜。采用UV1700紫外可见分光光度计和F-4500荧光分光光度计研究了该化合物在不同极性溶剂以及薄膜状态下的吸收光谱和荧光光谱特性。结果表明,在薄膜状态下化合物的吸收峰有一定蓝移,吸收带变宽。随溶液极性的增加,荧光光谱的最大峰值波长逐渐红移,分子的荧光量子产率以及斯托克斯位移也有较大变化。据此计算出DCDHF-2-V分子激发态与基态偶极矩之差为35.68×10-30C.m,并根据双能级模型确定了分子的二阶非线性极化率β随波长的变化情况,当激光基频波长为1064nm时,β为3323.4×10-40m4/V。
A D-π-A type tricarbonyl furan derivative (DCDHF-2-V) with a novel electron donor was synthesized via a two-step reaction. PMMA) blend of uniform polymer film. The UV1700 UV-Vis spectrophotometer and F-4500 fluorescence spectrophotometer were used to study the absorption and fluorescence spectra of the compound in different polar solvents and films. The results show that the absorption peak of the compound has a certain blue shift in the film state, and the absorption band broadens. With the increase of the solution polarity, the maximum peak wavelength of the fluorescence spectrum is gradually red-shifted, and the fluorescence quantum yield of molecules and the Stokes shift also change greatly. The difference between the DCDHF-2-V molecular excited state and the ground state dipole moment is calculated to be 35.68 × 10-30C.m, and the second-order nonlinear susceptibility β of the molecule is determined according to the change of wavelength Case, when the laser fundamental frequency of 1064nm, β is 3323.4 × 10-40m4 / V.