Synthesis, Growth, Structural, Optical Assessments and Second Order NLO Studies of D-Phenylglycinium Derivatives for Optoelectronic Applications

The domain of nonlinear optics is witnessing considerable expansion, incorporating knowledge from multiple scientific areas, such as physics, chemistry, optics, crystal growth, optoelectronics, and engineering. The study of nonlinear optics garners significant attention in organic-inorganic blend compounds, owing to their diverse properties that find applications in various fields. In-depth investigations have concentrated on the non-linear optical characteristics of organic and semi-organic crystals, which hold promising applications in device fabrication. A single crystal of D
phenylglycine derivatives, including Bis(D-phenylglycinium) sulfate monohydrate (BDPGS) and D-phenylglycine hydrochloride (DPGCL),were synthesized and grown through the slow evaporation method utilizing water as a solvent. The single crystal XRD analysis demonstrated that BDPGS crystallizes in the monoclinic space group, while DPGCL crystallizes in the orthorhombic space group. The optical properties of the compounds were characterized through UV-Visible absorption and reflectance spectra, revealing cut
off wavelengths of 230 nm and 228 nm for BDPGS and DPGCL,
respectively. This indicates a bandgap of 5.4 eV, suggesting superior optical quality for potential applications. The notably low Urbach energy indicates that the crystal is nearly devoid of defects, thereby maintaining its structural integrity and evaluation of refractive index
demonstrated the compounds' promising optical behavior. The
effectiveness of the second harmonic generation for the synthesized crystals was clearly demonstrated using the Kurtz Perry powder method, validating both the crystals shows tremendous potential for advanced technological applications.