Effect of Hydrogen Bond on Second-Order Nonlinear Optical Property of 2-Alkylcarboxamido-4′-methoxy-4-nitrotolan Derivatives
作者:Midori Kato、Masaaki Okunaka、Nami Sugita、Masashi Kiguchi、Yoshio Taniguchi
DOI:10.1246/bcsj.70.583
日期:1997.3
We have synthesized a series of 2-alkylcarboxamido-4′-methoxy-4-nitrotolan derivatives and studied the second-order nonlinear optical properties using the total reflection technique. We measured the infrared absorption spectra of the derivatives and examined the absorption peak of the N–H stretching vibration around 3300 cm−1, which is sensitive to hydrogen bonding. We observed that the peak frequencies of the nonlinear optical active materials were lower than those of the inactive ones, and thus found that for 2-alkylcarboxamido-4′-methoxy-4-nitrotolan derivatives the hydrogen bond plays an important role in activating the second-order optical nonlinearity of the material.
我们合成了一系列2-烷基羧酰胺-4'-甲氧基-4-硝基托烯衍生物,并使用全反射技术研究了其二阶非线性光学特性。我们测量了这些衍生物的红外吸收光谱,并检查了约3300 cm−1处氮-氢伸缩振动的吸收峰,该峰对氢键非常敏感。我们观察到,非线性光学活性材料的峰频率低于非活性材料,因此发现对于2-烷基羧酰胺-4'-甲氧基-4-硝基托烯衍生物,氢键在激活材料的二阶光学非线性中起着重要作用。