Growth and investigation of new non-linear optical crystals of LAP family

Abstract The possibility of preparing new analogs of L-arginine phosphate monohydrate, (LAP), has been investigated. Single crystals of the compound L-Arg·HCOOH, which had earlier been obtained in powdered form, were successfully grown during the course of this investigation. In addition, we have found that there is a class of compounds having the Arg·2Ax composition, (where Ax is one of several inorganic or organic acids). Such compounds (Arg·2HIO 3 , Arg·2HNO 3 , Arg·2H 3 PO 4 , Arg·2HF, Arg·2HCl·H 2 O, and Arg·2HBr·H 2 O) have been synthesized and single crystals grown. The crystals grown in this investigation were studied by IR and X-ray diffraction methods. The influence of the different amino acid groups on crystal symmetry and the influence of this symmetry on non-linear optical properties are discussed.

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