Abstract Research progress of an organic second-order nonlinear optical crystal 2-(4-(dimethylamino)styryl)-benzothiazole (DMASBT) was grown with slow cooling method and its performance characterization in different aspects were reported. It was found that the crystals had a high second harmonic generation efficiency of 9.8 times higher than that of KDP crystal. Crystal structure of the crystal was investigated by single crystal XRD. It was found that the crystal lattice is monoclinic. In addition, the crystal growth mechanism and intermolecular interaction were analyzed by chemical etching and Hirshfeld surface. The functional groups of the raw materials were determined by FT-IR, Raman, 1H NMR and elemental analysis. UV–vis–NIR spectrum, dielectric properties under different frequencies, thermal stability, and photostability of the crystal in powder state were also studied.

中文翻译：

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2-(4-(二甲氨基)苯乙烯基)-苯并噻唑的晶体生长和表征：一种潜在的有机非线性光学晶体

摘要 报道了采用缓冷法生长的有机二阶非线性光学晶体2-(4-(二甲氨基)苯乙烯基)-苯并噻唑(DMASBT)的研究进展及其不同方面的性能表征。发现该晶体具有比KDP晶体高9.8倍的高二次谐波产生效率。通过单晶XRD研究了晶体的晶体结构。发现晶格是单斜晶格。此外，通过化学蚀刻和Hirshfeld表面分析了晶体生长机制和分子间相互作用。原料的官能团通过FT-IR、Raman、1H NMR和元素分析确定。UV-vis-NIR 光谱、不同频率下的介电特性、热稳定性、