Solution Growth and Characterisation of L-alanine Single Crystals

Abstract

Single crystals of L‐alanine have been grown from buffered aqueous solutions and characterised as to their optical quality via wavefront distortion analysis, electrooptical response and harmonic generation efficiency. Refraction indices as well as phase matching loci were found in satisfactory agreement with previously published data for crystals grown in non buffered solution. Estimates for the electro‐optical response are reported for the first time. The experimentally observed crystal habit is discussed in terms of morphological importance (M.I.), which was found to be in disagreement with the predictions of crystallographic criteria based on the interplanar distance dhkl, on the periodic bond chains (PBC) and the attachment energy Eatt. This disagreement is tentatively attributed to the presence of impurities and non‐appropriate supersaturation conditions.

Effect of Amino Acid Additives on Crystal Growth Parameters and Properties of Ammonium Dihydrogen Phosphate Crystals

“…Monaco et al (1987) discovered NLO material L-arginine monohydrochloride, which belongs to space group P2 1 of monoclinic system with two molecules in the asymmetric unit. L-alanine crystallizes in orthorhombic system with noncentrosymmetric space group P2 1 2 1 2 1 (Razzetti et al, 2002).…”

Positron Annihilation Lifetime Analysis of Left- and Right-Handed Alanine Single Crystals

“…2) were obtained from solvent crystallization of enantiomerically pure L-or D-amino acid powders (L-alanine, 99+%, and D-alanine, 99+%, ACROS Organics™) [15,16]. The term "asymmetry" is used interchangeably with "chirality" or "helicity" depending on context; RH (right-handed) or LH (lefthanded) are used interchangeably for the amino acid designations L-or D-, respectively.…”

Studies on Nucleation, Growth and Characterization of L-Leucine Doped ZTS Crystals

“…The research on the synthesis of organic and inorganic complexes increased enormously in last few years [7,8]. Specifically, amino acids and strong inorganic acids are good raw materials to produce semi-organic crystals because amino acid crystals are having good optical properties [9]. The material ZTS is a promising semi-organic nonlinear optical material for second harmonic generation (SGH) from metal complexes of thiourea.…”