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通过两次羟醛缩合反应合成了一种含呋喃共轭桥的有机非线性光学生色团分子2-二氰亚甲基-3-氰基-4-[2-(4-二乙氨基-苯乙烯基-呋喃基-5)-乙烯基]-5,5-二甲基-2,5-二氢呋喃(EFFC),用IR谱、1H NMR谱以及元素分析表征确认了其结构.热失重分析表明,材料的热分解温度Td为250℃.用密度泛函理论的B3LYP方法在6-31G基组下对这种生色团分子进行了结构优化,并在相同基组下对分子的静态二阶极化率进行了计算,分子的β0=6.5×10-28esu.将分子以18%的质量比与聚砜进行主-客体掺杂,用溶胶凝胶法制备成膜后进行极化,用二次谐波法对掺杂极化聚合物薄膜的电光系数进行测量,其r33值最高达到80 pm/V.
A kind of organic non-linear optical chromophore molecule containing furan conjugation bridge was synthesized by two aldol condensation reactions. 2-Dicyanomethylene-3-cyano-4- [2- (4-diethylamino- 5-dimethyl-2,5-dihydrofuran (EFFC), its structure was confirmed by IR spectrum, 1H NMR spectrum and elemental analysis. The weight loss analysis showed that the thermal decomposition temperature Td of the material was 250 ° C. The structure of this chromophore molecule was optimized by the density functional theory B3LYP method under the 6-31G basis set and the molecular weight The static second-order polarizabilities were calculated with β0 = 6.5 × 10-28esu. The host was doped with polysulfone at a mass ratio of 18% and was prepared by sol-gel method and polarized , Using the second harmonic method to measure the electrooptic coefficient of the doped polarized polymer film, the r33 value up to 80 pm / V.