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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

✍ Scribed by M. Fleck; A. M. Petrosyan

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
112 KB
Volume
44
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

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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