Growth and characterization of gel grown single crystals of bis-glycine hydrogen chloride (BGHC)

Ambujam, K.; Rajarajan, K.; Selvakumar, S.; Madhavan, J.; Mohamed, Gulam; Sagayaraj, P.

doi:10.1016/j.optmat.2005.11.008

Cited by 37 publications

(14 citation statements)

References 21 publications

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“…Moreover, gel medium provides chemical species for the formation of crystals by keeping the diffusional path invariable all over the experiment. Consequently, gel technique has become more popular and has been used by several investigators [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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Single crystals of barium oxalate monohydrate (BaC 2 O 4 .H 2 O, BOM) were grown in pure form by controlled diffusion of Ba 2+ using the gel technique at different temperatures. Starting from aqueous Ba 2+ chloride (BaCl 2 ) and acetic acid (C 2 H 2 O 4 ) in gel, this method offers a low-cost and an easiest alternative to other preparation methods for the production of barium oxalate bulky single crystals. The optimal conditions for the growth of BOM crystals in silica gel were found by investigating different growth parameters such as gel pH, gel aging and crystallization temperature. Irrespective of all such crystallization environments, growth rate of the crystals were initially less and then exhibited supersaturation effect leading to non-linearity. Gel aging and temperature has profound effect on nucleation density that resulted less number of crystals of maximum size in the gel matrix. Perfect single crystals were grown on gels of higher pH. The macropore morphology and porosity was controlled by changing age of the gel. It has been found that temperature has a fabulous effect in controlling the nucleation density by altering the supersaturation conditions for the formation of critical nuclei. The entire growth kinetics informed that the grown crystals were derived by the one dimensional diffusion controlled process.

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Section: Introductionmentioning

confidence: 99%

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Raj¹,

Jayanthi

Jothy

et al. 2008

Cryst. Res. Technol.

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“…The involvement of NH 3 + in hydrogen bonding is evident from the fine structure of the band in the lower energy region. The C¼O stretch of À COOH seems to have an intense peak at 1728 cm À 1 [16]. However, the intense absorption band at 3208 cm À 1 is difficult to assign for the overlapping frequencies of (O-H) and (N-H).…”

Section: Ftir Spectral Analysismentioning

confidence: 96%

Synthesis, growth and characterization of organic nonlinear optical bis-glycine maleate (BGM) single crystals

Balasubramanian¹,

Murugakoothan²,

Jayavel

2010

Journal of Crystal Growth

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“…Unlike the other aminoacids, glycine has three polymorphic crystalline forms α, β and γ. Also glycine and its methylated analogues form complexes with mineral acids exhibiting interesting physical properties like ferroelastic, ferroelectric or antiferroelectric behaviour [10]. The configuration of glycine ions interconnected by short O-H⋯O hydrogen bonds are regarded as particularly important for the ferroelectric behaviour of this crystal and the molecules are held together by a network of N-H⋯X, N-H⋯O and O-H⋯O hydrogen bonds which are similar to the structures of diglycine hydrochloride [11], hyrdrobromide [12], hydroiodide [13] and disarcosine hydrobromide [14].…”

Section: Introductionmentioning

confidence: 99%

Growth, structural, optical, thermal and dielectric properties of a novel semi-organic nonlinear optical crystal: Dichloro-diglycine zinc II

Batra¹,

Rajnikant

Murugesan

et al. 2014

Progress in Natural Science: Materials International

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Dichloro-diglycine zinc II (DCDGZ II), a semi-organic nonlinear optical material has been synthesized and single crystals were grown from the aqueous solution up to dimensions 20 Â 10 Â 3 mm 3 . The title compound, DCDGZ II (C 4 H 10 Cl 2 N 2 O 4 Zn Á H 2 O) crystallizes into monoclinic structure with the space group of C2/c. The unit-cell parameters were found to be a ¼ 14.4191 (7), b ¼6.9180(2), c ¼12.9452(6) Å and Z¼4. In the crystal structure, DCDGZ II layer is building up alternatingly with layers of water in which the zinc ions lie on a twofold axis. Theoretical calculations for polarizability, which are useful for device fabrication were made using Clausius-Mosotti equation and Penn analysis and the results were compared. Fourier transform infrared (FTIR) spectroscopic studies were performed for the identification of the different functional groups presented in the compound. The UV-vis-NIR absorption spectrum reveals that the lower UV cut-off wavelength is 240 nm. The optical band gap of the crystal was estimated as 2.2 eV. The surface morphology, thermal behaviour, dielectric properties have been studied using SEM, TG/DTA and LCR HITESTER analyzer. The nonlinear optical property of the crystal was also confirmed using Kurtz powder technique.

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Growth and characterization of gel grown single crystals of bis-glycine hydrogen chloride (BGHC)

Cited by 37 publications

References 21 publications

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Growth aspects of barium oxalate monohydrate single crystals in gel medium

Synthesis, growth and characterization of organic nonlinear optical bis-glycine maleate (BGM) single crystals

Growth, structural, optical, thermal and dielectric properties of a novel semi-organic nonlinear optical crystal: Dichloro-diglycine zinc II

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