Analysis on the Growth and Characterization of a Non-linear Optical Single Crystal: L-Cystine Dihydrobromide

Abstract

Nonlinear optical single crystals of L-cystine dihydrobromide (LCHB) have been grown by slow evaporation method. Single crystal X-ray diffraction analysis revealed the crystal system and lattice parameter values. Powder X-ray diffraction analyses have been carried out and the diffraction patterns have been indexed. Fourier transform infrared (FTIR) analysis confirms the various functional groups present in the grown crystal. The thermal behavior of the grown crystal was investigated by DTA and TGA analysis. The optical properties of the crystals were determined using UV-Visible transmittance spectrum. The dielectric constant and dielectric loss of the crystal are studied as a function of frequency for various temperatures. The SHG efficiency of the crystal is studied using the Kurtz and Perry technique.

Synthesis and Characterization of Non-Linear Optical Crystal of Manganese Mercury Thiocyanate Glycol Monomethyl Ether

“…From Figure 10 the decrease in the value of dielectric constant with log frequency is due to the fact that the frequency of electric charge carriers cannot follow the alternation of the ac electric field applied beyond a certain critical frequency. In accordance with the Miller rule, the characteristics of low dielectric constant at high frequency suggest that the sample possesses enhanced optical quality with fewer defects 26 . The very low value of dielectric constant at higher frequencies is important for the fabrication of materials for ferroelectric, photonic and electro-optic devices.…”

Zwitterion-functionalized MIL-125-NH2-based thin-film nanocomposite forward osmosis membranes: towards improved performance for salt rejection and heavy metal removal

“…In addition to keeping all the characteristic peaks of the parent MIL-125-NH 2 , a shoulder adsorption peak in 1620 cm −1 (in the MIL-125-NH-CC-Cys spectrum) is attributed to the CO stretching frequency of COO − of amino acid, which has probably overlapped with the carboxylate peak related to MOF. 56,57 One must bear in mind that the observed infinitesimal peak at 1744 cm −1 is attributed to the CO stretching of the acidic groups of cysteine, which indicates that a small number of acidic groups of pristine amino acid has been preserved even after the modification processes. 56 In addition, in comparison with the spectrum of untouched MOF, the observed broadening roughly in the 2600–3600 cm −1 region composed of ν sy (C–H), ν sy (O–H), and ν sy (N–H) implies the successful attachment of cysteine to MOF.…”

“…56,57 One must bear in mind that the observed infinitesimal peak at 1744 cm −1 is attributed to the CO stretching of the acidic groups of cysteine, which indicates that a small number of acidic groups of pristine amino acid has been preserved even after the modification processes. 56 In addition, in comparison with the spectrum of untouched MOF, the observed broadening roughly in the 2600–3600 cm −1 region composed of ν sy (C–H), ν sy (O–H), and ν sy (N–H) implies the successful attachment of cysteine to MOF. On the other hand, an obvious broadness in the range of 1300–1400 cm −1 occurs due to NH 3 + bending vibration merging with the MOF peak in this region.…”

Investigation on Nucleation Kinetics, Growth and Nonlinear Optical Properties of L-Cystine Hydrochloride Crystal

“…It belongs to the monoclinic crystallographic system, space group C2, with cell parameters: a = 18.63, b = 5.26, c = 7.28 Å, β = 103.7, Z = 2. Although, the growth aspects of LCHCl crystal have been reported in our laboratory [4] and few reports are presented on LCHCl based NLO crystals [8][9][10][11]. In order to grow crystals with optical qualities for nonlinear and device applications, a systematic investigation of optimized growth conditions has been carried out.…”