A series of quinazolinone-based materials was synthesized and fully characterized. Firstly, the third-order nonlinear optical properties of the quinazolinone derivatives in CH₂Cl₂ were investigated by using Z-scan measurement. Secondly, the photophysical properties of the compounds were determined with aid of experimental and theoretical calculation methods. The results showed that the introduction of phenylacetylene groups on the planar structure of parent ring of 1a reduced the π-π intermolecular stacking of parent ring compound, and the formation of push-pull structure by connecting phenylacetylene groups to quinazolinone backbone decreased energy gap of entire molecule. A good NLO response was obtained, that the second-order NLO susceptibilities (γ) of 2b were 6.225×10^-31 esu, which is more than 7 times higher than that of no-modified 1a. Our results indicate that the quinazolinone derivatives were promising candidate materials for future nonlinear optical applications.

合成并充分表征了一系列基于喹唑啉酮的材料。首先，通过Z扫描测量研究了喹唑啉酮衍生物在CH ₂ Cl ₂中的三阶非线性光学性质。其次，借助实验和理论计算方法确定了化合物的光物理性质。结果表明，在1a的母环平面结构上引入苯乙炔基减少了母环化合物的π-π分子间堆积，并且通过将苯乙炔基连接至喹唑啉酮骨架形成推挽结构减少了整个分子的能隙。分子。获得了良好的NLO响应，即NLO的二阶NLO磁化率（γ）2b为6.225×10 ^-31 esu，比未修饰的1a高7倍以上。我们的结果表明，喹唑啉酮衍生物是未来非线性光学应用的有前途的候选材料。