“…The discovery of incredibly efficient NLO materials has increased research efforts in several areas, including optical communication, harmonic generation, frequency mixing, laser lithography, attracted significant interest due to their ease of crystallization in huge symmetries and shapes, which can pretty well pave the way for quick changes in the physical and chemical properties of the compounds, and have therefore become a highly investigated field. [7,8] The properties of both organic and inorganic materials, such as a high laser damage threshold, optical transparency, and high efficiency, are shared by semi-organic materials, which are currently being investigated. All amino acids, except for glycine, have chiral carbon atoms and may crystallize in the non-centrosymmetric space group, making complexes of amino acids with inorganic salts of interest as materials for optical second harmonic generation (SHG).…”