Growth of nonlinear optical γ-glycine crystals

Bhat, Mahima; Dharmaprakash, S. M.

doi:10.1016/s0022-0248(01)02094-2

Cited by 222 publications

(90 citation statements)

References 5 publications

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“…Organic NLO materials are generally more versatile than their inorganic counterparts owing to their more favourable non-linear response, since these are often formed by weak van der Waals and hydrogen bonds. 5 Organic materials with second-order, non-linear optical properties have been the subject of intense research owing to their potential use in a variety of technologies including telecommunications, optical information processing and storage devices. 6 -8 As part of the design of novel NLO materials, much effort is being devoted to understanding the origin of non-linearity in large systems and to correlate NLO responses with molecular structure and geometry.…”

Section: Introductionmentioning

confidence: 99%

Vibrational spectral studies and the non‐linear optical properties of a novel NLO material L‐prolinium tartrate

Padmaja¹,

Vijayakumar²,

Joe³

et al. 2006

J Raman Spectroscopy

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Vibrational spectral analysis of the novel non-linear optical (NLO) material, L-prolinium tartrate (LPT) was carried out using NIR-FT-Raman and FT-IR spectroscopy. The density functional theoretical (DFT) computations have been performed at B3LYP/6-31G (d) level to derive equilibrium geometry, vibrational wavenumbers, intensities and first hyperpolarizability. The reasonable NLO efficiency, predicted for the first time in this novel compound, has been confirmed by Kurtz-Perry powder second-harmonic generation (SHG) experiments. The charge-transfer interaction between the pyrrolidine ring and the carbonyl group of the tartrate anion through the intramolecular ionic hydrogen bonds is confirmed by the simultaneous activation of ring modes in IR and Raman spectra. The splitting of the ring-breathing mode, pseudorotational ring puckering modes and the NH 2 modes of the pyrrolidine ring lead to the conclusion that the pyrrolidine ring adopts a conformation intermediate between the envelope (bent) form and the half-chair (twisted) form, resulting in the lowering of symmetry fromC 2 to C s . The lowering of the methylenic stretching wavenumbers and the enhancement of the stretching intensities suggest the existence of the electronic effects of back-donation in LPT. The positional disorder of the pyrrolidine ring, the presence of blue-shifting H-bonds as well as other non-bonded interactions in LPT, low frequency H-bond vibrations and the role of intramolecular charge transfer and the hydrogen bonds in making the molecule NLO active have been analysed on the basis of the vibrational spectral features.

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Section: Introductionmentioning

confidence: 99%

Vibrational spectral studies and the non‐linear optical properties of a novel NLO material L‐prolinium tartrate

Padmaja¹,

Vijayakumar²,

Joe³

et al. 2006

J Raman Spectroscopy

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“…Crystalline salts of optically active amino acids represent an important class of semi organic crystals, which have the high optical non linearity of a purely organic material combined with the favorable mechanical and thermal properties of an inorganic material [1]. L-arginine phosphate monohydrate (LAP) is one such semi organic non-linear optical material studied by Chinese scientists [2].…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of semiorganic NLO crystals of LAHClBr

Thomas¹,

Aruna²,

Anuradha

et al. 2006

Cryst. Res. Technol.

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Single crystals of non-linear optical (NLO) LAHClBr were grown by slow evaporation technique from its aqueous solution. Good optical quality crystals having dimensions up to 12 x 9 x 7 mm 3 were obtained. The lattice parameters and morphology for the grown crystals were determined using single crystal XRD. The crystals were characterized by FT-Raman, optical absorption, thermal (DTA and TGA) and dielectric studies. LAHClBr was found to be thermally stable up to 124.3°C.

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“…In recent years, organic NLO materials are attracting a great deal of attention for possible use in optical devices because of their large optical nonlinearity, low cut-off wavelengths, short response time and high laser damage thresholds [1]. Considerable work has been done in order to understand the microscopic origin of nonlinear behavior of organic materials [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Growth and Characterization of Organic NLO Material: M-Nitroacetanilide

Rajendran¹,

Freeda²,

Kalasekar³

et al. 2011

AMPC

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Single crystals of m-Nitroacetanilide (mNAa) were successfully grown by slow evaporation method at a constant temperature 40°C from methanol solution. The solubility studies for mNAa were estimated. The cell dimensions were obtained by single crystal X-ray diffraction (XRD) study. The functional groups have been confirmed using Fourier transform infrared (FTIR) analysis. The placement of protons was identified from Nuclear Magnetic Resonance Spectroscopy (NMR) spectral analysis. UV-visible and fluorescence spectral analyses were carried out for the grown crystals. Thermo gravimetric analysis and differential thermal analysis were carried out to determine the thermal properties of the as grown crystal. The Second Harmonic Generation (SHG) efficiency of mNAa was also determined.

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Growth of nonlinear optical γ-glycine crystals

Cited by 222 publications

References 5 publications

Vibrational spectral studies and the non‐linear optical properties of a novel NLO material L‐prolinium tartrate

Vibrational spectral studies and the non‐linear optical properties of a novel NLO material L‐prolinium tartrate

Growth and characterization of semiorganic NLO crystals of LAHClBr

Synthesis, Crystal Growth and Characterization of Organic NLO Material: M-Nitroacetanilide

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