Growth, optical, thermal and dielectric studies of an amino acid organic nonlinear optical material: l-Alanine

Caroline, M. Lydia; Sankar, R.; Indirani, R.M.; Vasudevan, Subhash G.

doi:10.1016/j.matchemphys.2008.09.070

Materials Chemistry and Physics

2009

DOI: 10.1016/j.matchemphys.2008.09.070

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Growth, optical, thermal and dielectric studies of an amino acid organic nonlinear optical material: l-Alanine

M. Lydia Caroline

R. Sankar

R.M. Indirani

et al.

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Cited by 106 publications

(50 citation statements)

References 19 publications

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“…For pure L-alanine the grown compounds cell parameters were: a=5. 779Å, b=6.022Å, c=12.323Å and the volume V=428.9Å 3 [8]. There was a very small change in lattice parameters of orthophosphoric acid doped in L-alanine crystals.…”

mentioning

confidence: 93%

“…3 [8]. There was a very small change in lattice parameters of orthophosphoric acid doped in L-alanine crystals.…”

mentioning

confidence: 94%

“…Among the amino acids, L-alanine is the simplest molecule having second harmonic generation (SHG) efficiency, of which one third if that of well known potassium dihydrogen phosphate (KDP) [8].…”

mentioning

confidence: 99%

“…In particular, efforts have been made on pure amino acid and their complexes like Lalanine [2], L-valine [3], γ-glycine [4], L-serine sodium nitrate [5], L-histidine tetrafluoroborate [6], L-histidine bromide [7], etc. Among the amino acids, L-alanine is the simplest molecule having second harmonic generation (SHG) efficiency, of which one third if that of well known potassium dihydrogen phosphate (KDP) [8].…”

mentioning

confidence: 99%

“…The cutoff wavelength was observed around 238nm and no absorption from 238nm to 1100nm and it can be used as a material for SHG and related optoelectronic applications. The cut-off wavelength is slightly lower than that of pure L-alanine reported [8,14,15]. The FTIR spectrum was recorded in a range of 4000÷450cm −1, , using a Perkin Elmer Spectrum RX1 spectrophotometer.…”

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confidence: 99%

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Effect of phosphorous on the growth, optical, mechanical and thermal properties of L-alanine crystals

Maruthamuthu¹,

Arputhalatha²,

Ponnusamy³

et al. 2015

Photon. Lett. Poland

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Abstract-Single crystals of L-alanine were grown from aqueous solution with a small amount of orthophosphoric acid (H3PO4). The single crystal X-ray diffraction (XRD) analysis was employed to identify the cell parameters. The grown crystal was characterized by Energy Dispersive X-ray (EDX) spectrum. The UV-visible transmittance was recorded. The presence of a functional group was confirmed by FTIR analysis. The TGA/DTA studies showed the thermal properties of the crystals. The mechanical strength was analyzed by measuring microhardness of the grown compounds. The second harmonic generation of grown crystals was confirmed by the KurtzPerry method using an Nd:YAG laser.Nonlinear optical (NLO) materials capable of generating the second harmonic frequency play a major role in the domain of optoelectronics and photonics [1]. Due to their large nonlinearity, low cut-off wavelengths, high thresholds and short response time to laser power, NLO materials are attracting much attention for possible use in optical devices. In particular, efforts have been made on pure amino acid and their complexes like L-, L-histidine bromide [7], etc. Among the amino acids, L-alanine is the simplest molecule having second harmonic generation (SHG) efficiency, of which one third if that of well known potassium dihydrogen phosphate (KDP) [8].Phosphoric acid as a dopant has been found to yield crystals with a large plane area useful for IR detector applications [9,10]. Even at a very low concentration level of orthophosphoric acid, there has been reported [11] a significant improvement in the pyroelectric coefficient, lowering of dielectric permittivity at a transition temperature (T c ) and an increase in the coercive field of the triglycine sulphate (TGS) crystal. The influence of H 3 PO 4 dopant concentration on the TGS crystal growth and properties has been studied and the main objective has been to optimize the dopant concentration effective for an IR applications [12]. The presence of orthophosphoric acid in L-valine crystal exhibits improved mechanical strength and SHG [13]. * E-mail: chezhiyan70@gmail.com An attempt has been made to study the effect of acids on the optical, mechanical and thermal properties of Lalanine. Current investigation has been focused the effect of H 3 PO 4 on L-alanine growing from aqueous solution. The starting material was synthesized by adding orthophosphoric acid (1ml) to the high purity L-alanine (2.23g) salt, taken and dissolved in 25ml of deionized water in a beaker. The mixed solution was slightly heated and stirred continuously for 8 hours. After that the saturated solution was filtered and then prepared in a crystallizing vessel with perforated covers. It was kept in a constant temperature bath in undisturbed conditions to maintain a temperature of 35ºC. After the growth period of one week, good quality transparent crystals were obtained from the saturated aqueous solution of L-alanine in the presence of H 3 PO 4 . Figure 1 shows the photograph of the grown crystal. Single crystal X-ray diffraction ...

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mentioning

confidence: 93%

“…3 [8]. There was a very small change in lattice parameters of orthophosphoric acid doped in L-alanine crystals.…”

mentioning

confidence: 94%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Effect of phosphorous on the growth, optical, mechanical and thermal properties of L-alanine crystals

Maruthamuthu¹,

Arputhalatha²,

Ponnusamy³

et al. 2015

Photon. Lett. Poland

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Luminescent probing of the simplest chiral α‐amino acid–alanine in an enantiopure and racemic state

et al. 2017

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Luminescent spectroscopy combined with the technique of luminescent probing with rare earth ions (europium, gadolinium, terbium) and an actinide ion (uranyl) was used to differentiate enantiopure and racemic alanine, the simplest chiral proteinogenic amino acid. Using the achiral luminescent probes, small differences between pure L and DL alanine in the solid state were strongly amplified. Based on the observed electronic transitions of the probes, the position of the triplet level of the coordinated alanine was estimated. Formation of homo- and heterochiral complexes between enantiomers of alanine and the metal ions is discussed as a possible mechanism of chiral self-discrimination.

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Comments on papers reporting IR‐spectra and other data of alleged L‐alanine alaninium nitrate and L‐alanine sodium nitrate crystals

Fleck¹,

Petrosyan

2009

Cryst. Res. Technol.

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We argue that the IR‐ and Raman‐spectra of “L‐alanine alaninium nitrate” given in “Investigation on the growth, optical behaviour and factor group of an NLO crystal: L‐Alanine Alaninium nitrate” by Aravindan et al., Cryst. Res. Technol. 42, 1097 (2007), actually concern L‐Alanine. Correspondingly, the data presented in “A comparative study on the growth and characterization of nonlinear optical amino acid crystals: L‐Alanine (LA) and L‐alanine alaninium nitrate (LAAN)” by Aravindan et al., Spectrochim. Acta A 71, 297 (2008), seems to be erroneous, as is “Synthesis, Growth, and Characterization of a New Semiorganic Nonlinear Optical Crystal: L‐Alanine Sodium Nitrate (LASN)”, Sethuraman, et al., Cryst. Growth Des. 8, 1863 (2008). In these papers properties and data were reported for L‐Alanine compounds that actually are L‐Alanine crystals and, in addition, unit cell parameters were given that seem to have been copied from other papers. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Growth, optical, thermal and dielectric studies of an amino acid organic nonlinear optical material: l-Alanine

Cited by 106 publications

References 19 publications

Effect of phosphorous on the growth, optical, mechanical and thermal properties of L-alanine crystals

Effect of phosphorous on the growth, optical, mechanical and thermal properties of L-alanine crystals

Luminescent probing of the simplest chiral α‐amino acid–alanine in an enantiopure and racemic state

Comments on papers reporting IR‐spectra and other data of alleged L‐alanine alaninium nitrate and L‐alanine sodium nitrate crystals

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