Crystal growth and characterization of γ-glycine grown from potassium fluoride for photonic applications

Dillip, G.R.; Raghavaiah, Pallepogu; Mallikarjuna, K.; Reddy, C. Madhukar; Bhagavannarayana, G.; Kumar, Vivek; Raju, B. Deva Prasad

doi:10.1016/j.saa.2011.04.031

Cited by 32 publications

(12 citation statements)

References 24 publications

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“…[2]. In the past years, many authors have reported the growth and various characterizations of γ-glycine with various additives, such as phosphoric acid, potassium chloride, potassium fluoride, lithium sulphate, lithium acetate and lithium nitrate [3][4][5][6]. Gamma glycine is currently grown by many conventional methods, such as slow cooling, slow evaporation as well as gel method.…”

Section: Introductionmentioning

confidence: 99%

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

Latha

Anbuchezhiyan²,

Kanakam

et al. 2017

Materials Science-Poland

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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).

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Section: Introductionmentioning

confidence: 99%

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

Latha

Anbuchezhiyan²,

Kanakam

et al. 2017

Materials Science-Poland

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“…An absorption peak observed at 400 nm arises due to the electron transition between n and π* states. Energy gap of DBNP is calculated using the formula 25 is mainly localized over the oxygen atoms (O 12 and O 13 ) of the nitro group. The maximum positive region is being localized on the hydrogen atom (H 8 ) of the hydroxyl group which indicates a possible site for nucleophilic attack which confirms that the oxygen atoms (O 12 and O 13 ) are the sites for electrophilic attack and hydrogen atom (H 8 ) is the site for nucleophilic attack.…”

Section: Uv-vis-nir Spectrum Studiesmentioning

confidence: 99%

Growth, thermal, vibrational studies and quantum chemical calculations of 2,6-dibromo-4-nitrophenol: a new nonlinear optical crystal

Sangeetha¹,

Prasad²,

Mathammal³

2016

Materials Research Innovations

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Good-quality single crystals of 2,6-dibromo-4-nitrophenol have been grown by slow evaporation solution growth technique using ethanol as solvent. The lattice parameters of the grown crystal were confirmed from single-crystal XRD analysis. Quantum chemical calculations were carried out using DFT /B3LYP/6-31 G(d,p) method. The optimized geometrical parameters have been obtained from the computational technique, and the result shows good agreement with the experimental XRD data. Both the experimental and theoretical vibrational spectrum confirms the presence of functional groups. Optical absorption behaviour of the grown crystal was examined by recording the optical spectrum and band gap energy was also estimated. Theoretical investigation shows that the title compound exhibits non-zero first-order hyperpolarizability values and has microscopic non-linear optical behaviour which is 22 times more than that of urea. The calculated HOMO and LUMO energies reveal the charge transfer characteristic of the title compound. Frequency conversion property of the grown crystal was investigated using Kurtz and Perry powder technique.

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“…a-Glycine was reported more readily to crystallise than the thermodynamically stable c-polymorph and grew 500 times faster than c-glycine (Chew et al, 2007). The stable c-form of glycine only nucleated at high and low pH or using additives such as sodium chloride (Bhat & Dharmaprakash, 2002), potassium fluoride (Dillip et al, 2011), silver nitrate (Sekar & Parimaladevi, 2009) and other salts. In the salt solution, the presence of electrolytes could affect the packing arrangements of glycine molecules via Columbic interactions and prevent a-form crystallisation, resulting in the preferential nucleation of c-form (Yang et al, 2008).…”

Section: Mechanism Of Crystal Formationmentioning

confidence: 99%

Nucleation of amino acid‐rich crystals on the surface of dried scallop (Chlamys farreri) during storage: formation mechanism and influence of environmental relative humidity

Zhang

Liu

et al. 2016

Int J of Food Sci Tech

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Summary Formation of crystals on the surface of dried scallop (Chlamys farreri) adductor muscle is often observed during storage. The composition of these white crystals was determined, and the effect of relative humidity (RH) during storage on their formation was also studied. The white crystals were determined as the crystal of free amino acids, mainly composed of taurine (Tau) and glycine (Gly). The main polymorphic form of glycine in the crystals was further confirmed as the γ‐form. Besides free amino acids, another major part of the crystal composition was ions, such as Na+, NH4+, K+, PO43− and Cl−. The presence of various free amino acids and Na+ and K+ might contribute to the crystallisation of γ‐glycine. RH particularly at 65% and above significantly increased the amount of crystals. RH of 43% and below was recommended to prevent the formation of amino acid‐rich crystals on dried scallops during storage.

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Crystal growth and characterization of γ-glycine grown from potassium fluoride for photonic applications

Cited by 32 publications

References 24 publications

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

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

Growth, thermal, vibrational studies and quantum chemical calculations of 2,6-dibromo-4-nitrophenol: a new nonlinear optical crystal

Nucleation of amino acid‐rich crystals on the surface of dried scallop (Chlamys farreri) during storage: formation mechanism and influence of environmental relative humidity

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