The potential organic bis-benzotriazole trichloroacetic acid (BBTCA) single crystal was formed by slow evaporation of solvents by solution-growth method. The structural parameters and crystalline perfection of BBTCA crystal was confirmed by single crystal X-ray diffraction and powder X-ray diffraction analyses. The BBTCA crystal belongs to the crystal system monoclinic with the space group of P2 1 /c. Various functional groups and corresponding modes of vibrations were identified by using FTIR spectrum. The optical transparency window of the grown BBTCA crystal was studied by UV–Vis–NIR spectroscopy. Photoluminescence study indicates that the broad band emissions occurred at near band edge of the visible region. In TG-DTA, thermal behaviour reveals that BBTCA is thermally stable up to 130°C. The dielectric properties of BBTCA with respect to frequency were investigated with various temperatures. Third-order nonlinearities and mechanical behaviour of as-grown BBTCA crystal were tested by Z-scan experiment and Vicker’s hardness test.

中文翻译：

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双苯并三唑三氯乙酸单晶的合成、生长、结构、光学、热学和机械性能

潜在的有机双苯并三唑三氯乙酸 (BBTCA) 单晶是通过溶液生长法缓慢蒸发溶剂形成的。通过单晶X射线衍射和粉末X射线衍射分析证实了BBTCA晶体的结构参数和结晶完善性。BBTCA晶体属于单斜晶系，空间群为P2 1 /c。通过使用 FTIR 光谱识别了各种官能团和相应的振动模式。通过紫外-可见-近红外光谱研究了生长的 BBTCA 晶体的光学透明窗口。光致发光研究表明，宽带发射发生在可见光区的近带边缘。在 TG-DTA 中，热行为表明 BBTCA 在高达 130°C 时是热稳定的。在不同温度下研究了 BBTCA 相对于频率的介电特性。通过Z-扫描实验和维氏硬度测试测试了BBTCA晶体的三阶非线性和力学行为。