A series of D-π-A chromophores based on allylidenemalononitrile electron-withdrawing group was designed. The influence of the amino-electron-donating group on the photophysical properties was studied. These compounds, highly thermally stable, exhibit orange-red emission in solution and in solid state. The experimental results have been rationalized by theoretical DFT calculations. The second order nonlinear optical properties were also studied using the electric field induced second harmonic generation (EFISH) method.

中文翻译：

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氨基取代的1,1-二氰基-2,4-二芳基-1,3-丁二烯发色团：合成与光物理性质

设计了一系列基于烯丙基丙二腈吸电子基团的D-π-A发色团。研究了氨基给电子基团对光物理性质的影响。这些化合物具有很高的热稳定性，在溶液中和固态时会显示橙红色发射。实验结果已经通过理论DFT计算得到了合理化。还使用电场感应二次谐波产生（EFISH）方法研究了二阶非线性光学性质。