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<p>L-histidine hydrochloride (LHHCl) single crystals were successfully grown by a slow solvent evaporation technique under optimized conditions. The obtained crystals were characterized using powder X-ray diffraction (PXRD), ultraviolet–visible (UV–Vis) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and thermal analysis methods (TGA/DTA). PXRD confirmed the orthorhombic crystal system and verified phase purity. The UV–Vis spectrum showed high transparency in the visible region with a sharp absorption edge near 260–280&#xa0;nm, indicating good optical quality and suitability for photonic applications. FTIR analysis confirmed the presence of functional groups associated with L-histidine and verified the formation of LHHCl crystals. Thermal studies revealed good stability up to 100&#xa0;°C with major decomposition around 280&#xa0;°C. The second harmonic generation (SHG) efficiency, measured by the Kurtz–Perry powder method, showed that the grown LHHCl crystals exhibit a higher nonlinear optical response compared to the standard KDP sample. These results highlight that LHHCl is a promising semiorganic material for nonlinear optical and optoelectronic device applications.</p>

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Growth, structural, optical, thermal and nonlinear optical studies of L-histidine hydrochloride (LHHCl) single crystals for optoelectronic applications

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • A. Joselin Akila,
  • J. E. Sangeetha,
  • S. Stephen Rajkumar Inbanthan,
  • B. Sahaya Infant Lasalle,
  • Muthu Senthil Pandian

摘要

L-histidine hydrochloride (LHHCl) single crystals were successfully grown by a slow solvent evaporation technique under optimized conditions. The obtained crystals were characterized using powder X-ray diffraction (PXRD), ultraviolet–visible (UV–Vis) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and thermal analysis methods (TGA/DTA). PXRD confirmed the orthorhombic crystal system and verified phase purity. The UV–Vis spectrum showed high transparency in the visible region with a sharp absorption edge near 260–280 nm, indicating good optical quality and suitability for photonic applications. FTIR analysis confirmed the presence of functional groups associated with L-histidine and verified the formation of LHHCl crystals. Thermal studies revealed good stability up to 100 °C with major decomposition around 280 °C. The second harmonic generation (SHG) efficiency, measured by the Kurtz–Perry powder method, showed that the grown LHHCl crystals exhibit a higher nonlinear optical response compared to the standard KDP sample. These results highlight that LHHCl is a promising semiorganic material for nonlinear optical and optoelectronic device applications.