Urotropine p–nitrophenol (UTPN), a potential organic nonlinear optical material was grown by solution growth technique using methanol-water solvent. The triclinic crystal system with non-centrosymmetric space group P1 of the grown crystal has been confirmed via single crystal X-ray diffraction analysis. The FTIR study confirms the functional groups present in the grown UTPN crystal. The linear optical behavior such as refractive index, complex dielectric constants and optical conductivity has been inspected through UV–vis–NIR spectrum. Optical band gap is found to be 3.02 eV. The luminescence property of the grown crystal was analyzed by photoluminescence spectroscopy. Kurtz-Perry powder technique is used to estimate the second harmonic generation efficiency of UTPN and is found to be 4.6 times superior to KDP crystal. Laser damage threshold value of the grown crystal is investigated by using 1064 nm Nd:YAG laser. The thermal stability of UTPN has been studied by thermo gravimetric and differential thermal analysis. This forms the properness of the grown UTPN crystal for potential nonlinear optical applications.

乌托品对硝基苯酚（UTPN）是一种潜在的有机非线性光学材料，采用甲醇-水溶剂通过溶液生长技术生长。通过单晶X射线衍射分析已经确认了具有非中心对称空间群P1的生长晶体的三斜晶系​​。FTIR研究证实了生长的UTPN晶体中存在的官能团。线性光学行为，例如折射率，复数介电常数和光导率已通过UV-vis-NIR光谱进行了检查。发现光学带隙为3.02eV。通过光致发光光谱分析生长的晶体的发光性质。使用Kurtz-Perry粉末技术估算UTPN的二次谐波产生效率，发现它比KDP晶体高4.6倍。使用1064 nm Nd：YAG激光器研究生长晶体的激光损伤阈值。UTPN的热稳定性已通过热重分析和差热分析进行了研究。对于潜在的非线性光学应用，这形成了生长的UTPN晶体的适当性。