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首页> 外文期刊>Physica, B. Condensed Matter >Crystal growth and characterization of l-phenylalaninium trichloroacetate - A new organic nonlinear optical material
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Crystal growth and characterization of l-phenylalaninium trichloroacetate - A new organic nonlinear optical material

机译：新型有机非线性光学材料l-苯丙氨酸三氯乙酸盐的晶体生长和表征

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摘要

Amino acid based crystals exhibit excellent nonlinear and electro-optical properties. A new nonlinear optical single crystal l-phenylalaninium trichloroacetate (LPTCA) belonging to the amino acid group was grown by the slow evaporation solution growth method. The grown crystals have been subjected to powder X-ray diffraction studies to identify the crystalline nature. Single crystal X-ray diffraction study showed that LPTCA belongs to monoclinic crystal system. Fourier transform infrared study is used to confirm the presence of various functional groups in the grown crystal. Optical transparency of the grown crystals was investigated by UVvisNIR spectrum. The lower optical cutoff wavelength for this crystal is observed at 254 nm and energy band gap is 4.89 eV. Thermal properties of the LPTCA crystal were studied by thermogravimetric analysis (TGA) and differential thermal analysis (DTA) techniques, which indicate that the material does not decompose before melting. The melting point of grown crystal was observed to be 136°C in a melting point apparatus. The existence of nonlinear optical (NLO) property of LPTCA was confirmed by second harmonic generation test using Nd:YAG laser fundamental wavelength of 1064 nm.
机译：氨基酸基晶体具有出色的非线性和光电特性。通过缓慢蒸发溶液生长法生长了一种新的非线性光学单晶，属于氨基酸基的1-苯基丙氨酸三氯乙酸盐（LPTCA）。已对生长的晶体进行了粉末X射线衍射研究，以确定其晶体性质。单晶X射线衍射研究表明，LPTCA属于单斜晶系。傅里叶变换红外研究用于确认生长的晶体中各种官能团的存在。通过UVvisNIR光谱研究了生长晶体的光学透明性。在254 nm处观察到该晶体的较低光学截止波长，并且能带隙为4.89 eV。通过热重分析（TGA）和差热分析（​​DTA）技术研究了LPTCA晶体的热性能，这表明该材料在熔化之前不会分解。在熔点仪中观察到生长的晶体的熔点为136℃。 LPTCA的非线性光学（NLO）特性的存在通过使用1064 nm Nd：YAG激光器基波的二次谐波生成测试来确认。

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