The second order nonlinear optical material and the single crystal of 2,5-Dimethyl-N-(3-phenylprop-2-en-1-ylidene) aniline (2,5 DPPA) which is organic in character was well synthesised by the standard slow evaporation method. The crystalline structure of 2,5 DPPA studied by single crystal XRD analysis confirmed that the material belongs to the orthorhombic crystal system with non-centrosymmetric space group P2₁2₁2₁. Functional groups were analyzed by Fourier transforms infrared analysis. The calculated optical band gap was found to be 2.76 eV. The second harmonic generation of 2,5 DPPA crystal was confirmed by Kurtz–Perry powder test using the source of Nd:YAG laser and found that it is 1.25 times greater than that of reference KDP material. Thermal stability of the titled crystal was studied by TGA/DTA technique. The Vicker’s hardness (H_v) test portrays that the mechanical resistance of the crystal’s hardness coefficient value is 2. The dielectric constant and dielectric loss of the grown crystal decreases with increase in array of the line of value of the frequencies.

用该标准很好地合成了有机二阶非线性光学材料和特性为有机的2,5-二甲基-N-（3-苯基丙-2-烯-1-亚烷基）苯胺（2,5 DPPA）单晶缓慢蒸发法。通过单晶XRD分析研究了2,5 DPPA的晶体结构，证实该材料属于具有非中心对称空间群P2 ₁ 2 ₁ 2 ₁的正交晶系。。通过傅立叶变换红外分析法分析官能团。发现计算的光学带隙为2.76eV。使用Nd：YAG激光源通过Kurtz-Perry粉末测试确认了2,5 DPPA晶体的二次谐波生成，发现它是参考KDP材料的1.25倍。通过TGA / DTA技术研究了标题晶体的热稳定性。维氏硬度（H _v）测试表明，晶体的硬度系数值为2的机械电阻。生长的晶体的介电​​常数和介电损耗随频率值线阵列的增加而降低。