【摘要】 使用二环己基碳酰亚胺(DCC)和N,N 二甲基吡啶(DMAP)催化合成了非线性生色化合物2 炔丙基 4 [4 N,N 二乙基苯偶氮基]苯甲酸酯(PBAB)。与酸催化等法进行比较,DCC/DMAP催化法具有反应条件温和、产率高的优点。用紫外、红外、核磁和元素分析对化合物结构进行表征。测定了其光限幅性能,在低入射激光光强时,透射光强度随入射光强度增加而增加;当入射光强度达151.4GW/cm2透射光强开始偏离线性,呈现非线性光限幅效应。对其限幅机制进行了分析,结果显示产物对1064nm波长激光的限幅机制主要是双光子吸收机制。更多还原

【Abstract】 The nonlinear optical chromophoric compound, 2-propynyl-｛4-[4-N,N-diethyl-benzeneazo]｝benzoate (PBAB), was synthesized using 1,3-dicyclohexylcarbodiimide and p-dimethyaminopyridine as catalysts. Compared with the precurse route, the former has special advantages, such as higher yield and mild reaction temperature. The structure of N PBAB was characterized by IR, UV-spectra, 1HNMR and element analysis. The optical limiting property from PBAB in THF solution was studied. In the low fluence region, the PBAB solution with a concentration of 4.0mg/cm~2 exhibites a high linear transmittance (68%) and the transmitted fluence linearly increases with the incident fluence. The transmitted fluence starts to deriate from linearity at the incident fluence of 151.4GW/cm~2, showing nonlinear optical limiting effect. The limiting mechanism of NABP was discussed, showing that the optical limiting in PBAB solution to the laser with 1064nm wavelength and 40ps pulses width mainly originates from the two-photon absorption.更多还原