A new class single crystal l-lysine hydrogen chloride (LLHC) for optoelectronic applications

• Published in: Journal of materials science. Materials in electronics 2021-11, Vol.32 (22), p.26351-26358
• Main Authors: Varadarajan, S., Kumar, M. Senthil, Shanmugan, S., Arputhalatha, A., Chithambaram, V., Palani, Geetha
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Crystal growth; Crystal lattices; Cut off wavelength; Deionization; Differential thermal analysis; E coli; Ethanol; Functional groups; Hydrochloric acid; Hydrogen chloride; Infrared analysis; KDP crystals; Lattice parameters; Lysine; Materials Science; NMR; Nuclear magnetic resonance; Optical and Electronic Materials; Optoelectronics; Physiochemistry; Potassium phosphates; Refractivity; Second harmonic generation; Single crystals; Spectrum analysis; Stability analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-06987-z

This manuscript is discussing the growth of a new class semi-organic nonlinear crystal l -Lysine hydrogen chloride (LLHC) was grown by slow evaporation method using a mixed solvent of deionized water + ethanol and pure deionized water. The crystal crystallizes in orthorhombic space group of P2 1 2 1 2 1 . Lattice parameters were revealed by single crystal X-ray diffraction analysis. The FT-IR spectral analysis was performed on the grown crystal LLHC to identify its functional groups. The position of protons and carbons was determined by the NMR technique. The grown crystal was characterized by optical transparency through UV–Vis range with a short cutoff wavelength of 212nm. Thermal and physiochemical stability of the title crystal was found out through the TG-DTA analysis, which proves the crystal stability up to 251.4 °C. Brewster’s point method was used to find out the refractive index of the grown compound LLHC. Vickers’s microhardness test was performed on LLHC to find out its mechanical stability. The second harmonic generation (SHG) of the grown crystal LLHC was confirmed by the Kurtz-perry powder method and the SHG efficiency was compared with the known Potassium Dihydrogen phosphate (KDP) standard. By using a minimal bactericidal concentration (MBC) benchmark, their antibacterial activity was evaluated. The grown crystal shows long-term and outstanding antibacterial activity against E.coli and S.aureus .