Growth, structural, thermal and optical studies on L-glutamic acid hydrobromide - A new semiorganic NLO material

Growth, structural, thermal and optical studies on L-glutamic acid hydrobromide - A new semiorganic NLO material

A new semiorganic crystal, L‐glutamic acid hydrobromide, C5H10NO4Br (GHB) has been grown from aqueous solution. The single crystal X‐ray analysis of the crystal showed that it belongs to the non‐centrosymmetric P212121 space group with protonated glutamic acid as cation and bromine as anion. The bac...

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Veröffentlicht in:Crystal research and technology (1979) 2008-07, Vol.43 (7), p.713-719
Hauptverfasser: Natarajan, S., Chitra, G. P., Britto Dhas, S. A. Martin, Athimoolam, S.
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Sprache:eng
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crystal structure
FTIR
L-glutamic acid hydrobromide
NLO
TGA/DTA
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container_issue 7
container_start_page 713
container_title Crystal research and technology (1979)
container_volume 43
creator Natarajan, S.
Chitra, G. P.
Britto Dhas, S. A. Martin
Athimoolam, S.
description A new semiorganic crystal, L‐glutamic acid hydrobromide, C5H10NO4Br (GHB) has been grown from aqueous solution. The single crystal X‐ray analysis of the crystal showed that it belongs to the non‐centrosymmetric P212121 space group with protonated glutamic acid as cation and bromine as anion. The back‐bone conformations of the amino acid are in cis and trans form. The side‐chain conformations are observed to be in gauche I / trans / cis / trans forms. The characteristic ‘head‐to‐tail’ hydrogen bonding interaction is observed through a chain C(5) motif. Further, the crystal structure is stabilized by an intricate three‐dimensional hydrogen bonding network. TGA/DTA showed that the grown crystals are thermally stable upto 219 °C without any phase transition. The functional groups responsible for the various modes of vibrations were identified by using FTIR spectroscopy. UV‐Vis‐NIR spectra showed that the crystals have excellent transparency in the visible and infrared regions. The second harmonic generation (SHG) conversion efficiency was investigated to explore the NLO characteristics of the material. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
doi_str_mv 10.1002/crat.200711089
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source Wiley Online Library - AutoHoldings Journals
subjects crystal structure
FTIR
L-glutamic acid hydrobromide
NLO
TGA/DTA
title Growth, structural, thermal and optical studies on L-glutamic acid hydrobromide - A new semiorganic NLO material
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