Synthesis, crystal structure and vibrational spectroscopy of a nonlinear optical crystal: l-arginine maleate dihydrate

Synthesis, growth and characterization of organic nonlinear optical bis-glycine maleate (BGM) single crystals

“…The bands observed in the region 400-500 cm À 1 arise from internal vibrations of glycine cations, maleate anions and vibration of hydrogen bonds. On investigation of the absorption bands below 1000 cm À 1 , COO À rocking, COO À wagging, and CH 2 rocking are identified at 494, 588 and 768 cm À 1 , respectively [14]. The absorption bands occur at 806 and 868 cm À 1 corresponding to C-C stretchings.…”

“…The maleic acid decomposes between the temperatures 220 and 310 1C. The endothermic peak observed at 334.9 1C in DTG corresponds to the formation of peptide [22]. The reactions of simplest amino acids induced by heating include the condensation reactions of carboxyl and amino groups leading to the formation of peptide bonds.…”

Growth, spectral, thermal, optical, mechanical and etching studies of l-lysine semi-maleate (l-LSM) single crystals

“…Extensive investigations on this direction resulted in the discovery of a series of L-lysine based amino acid compounds [2][3][4][5][6]. Recently, the salts of weak carboxylic acid (maleic acid) with amino acids, viz., L-alaninium maleate, L-arginine maleate dihydrate and L-phenylalaninium maleate were reported as good NLO materials [7][8][9]. In this series, L-lysine semi-maleate (L-LSM), one of the amino acid based organic materials and the crystal structure was reported by Pratap et al [10].…”

Non-critically phase-matched second harmonic generation and third order nonlinearity in organic crystal glucuronic acid γ-lactone

“…1 Many organic crystals are known to have high non-linear coefficients. [2][3][4][5][6][7] However, most of them exhibit a platy or needle type morphology and have a cutoff wavelength close to the second-harmonic wavelength (532 nm) of the fundamental wavelength (1064 nm) of the Nd:YAG laser. Saccharides, on the other hand, exhibit an extremely good UV transparency and offer a combination of attractive properties like chirality (ensuring that these materials crystallize in a non-centrosymmetric space group), large birefringence, low dispersion (permitting the possibility of phase-matched nonlinear optical applications), and can be synthesized in bulky morphologies.…”