Synthesis and characterization of γ-glycine – a nonlinear optical single crystal for optoelectronic and photonic applications

Abstract

A single crystal of gamma-glycine (GG), a polymorph of glycine, was synthesized by crystallization. The single crystal of GG was grown from an aqueous solution. The morphology of GG was studied in order to assess its growth facets. The good quality single crystals were subjected to X-ray diffraction studies to reveal their structure. The FT-IR spectral analysis was carried out to confirm the presence of expected functional groups. The UV-Vis analysis was done for GG single crystals to determine the optical transparency and band gap. Simultaneous TG-DTA analysis was employed to understand the thermal and physicochemical stability of the title compound. The mechanical stability and laser stability of GG single crystal were studied using Vickers microhardness test and laser induced damage threshold on different planes of the crystal to reveal its anisotropic nature. The dielectric measurement was carried out as a function of frequency and the results were discussed. The existence of second harmonic generation (SHG) of the title compound was confirmed by Kurtz-Perry powder technique. The SHG effective nonlinearity and particle size dependence of GG powder sample were compared with a standard reference material: potassium dihydrogen phosphate (KDP).

Glycine: The Gift that Keeps on Giving

“…The γ-polymorph has also remarkable non-linear optical properties and can be used for second harmonic generation (SHG). [278][279][280][281] This property can also find biomedical applications, such as diagnostic imaging. SHG can provide disease diagnosis through characterization of biological building blocks.…”

Multi-Ligand Copper Complex with Fungicidal and Stimulating Effect for Increasing the Germination and Phytosafety of Plants

“…The spectrum of glycine shows stretching vibration of HCH and NH groups which appear in the regions of 2167 cm -1 to 2598 cm -1 and from 2794 cm -1 to 3441 cm -1 (Figure 3a). The signal 1498 cm -1 characterizes the symmetric stretching vibration of the COO-group; 1323 cm -1 -CH 2 ; deformation vibration С-Н has an absorption band in the region of 929 cm -1 ; bands in the region of 1043 cm -1 ; and 889 cm -1 characterize different stretching vibrations of the C-N and C-C bonds [22][23]. In the IR spectrum of succinic acid, O-H in the carboxyl group is characterized by an absorption band at 3200 cm -1 ; С-Н -2942 cm -1 ; absorption bands in the regions of 1725 cm -1 and 1570-1550 cm -1 cause antisymmetric and symmetric stretching vibrations of the C=O carbonyl group (Figure 3b) [24].…”

Micro-emulsion synthesis of La1 − xCrxFeO3 nanoparticles: effect of Cr doping on ferroelectric, dielectric and photocatalytic properties

“…When the frequencies was increased, at certain limit the space charge polarization did not carry on and act in accordance with the externally applied field. At this point, space charge polarization decreased as frequency was increased and the values of dielectric loss and dielectric constant are diminished (Arputha Latha et al 2017). Maxwell Wagner model and Koop's theory explains the causes of dielectric loss and dielectric constant.…”