Growth and characterization of pure and doped nonlinear optical l‐arginine acetate single crystals

Abstract

Single crystals of organic nonlinear optical material of pure, Cu 2+ and Mg 2+ doped L-arginine acetate (LAA) were successfully grown by slow evaporation method at room temperature. The UV-Vis-NIR spectra of pure and doped LAA indicate that these crystals possess a wide optical transmission window from 240-1600 nm. Non-linear optical studies reveal that the SHG efficiency of LAA is nearly three times that of KDP. The dielectric response of the samples was studied in the frequency region 100 Hz to 2 MHz and the influence of Cu 2+ and Mg 2+ substitution on the dielectric behaviour had been investigated. Photoconductivity study proves that both pure and Cu 2+ and Mg 2+ doped LAA crystal exhibit positive photoconductivity. It is evident from the Vickers hardness study that the hardness of the crystal decreases with increasing load both for pure and doped samples. ESR studies confirmed the incorporation of Cu 2+ into LAA and the value of g-factor was found to be 2.1654.

Spectroscopic study of l-arginine interaction with potassium dihydrogen phosphate crystals

“…The crystal growth procedure, which is explained in detail elsewhere, 15 is similar to the one currently used and amply described in the literature. [7][8][9][10][11][12][13][14][15][16] Briefly, it is as follows: after the experimental confirmation of the solubility curve of KDP in doubly distilled water, a 0.5 wt% solution of L-arginine was added for doping into the saturated solution of 1 M KDP. The mixture was stirred for 8 h to promote homogenization.…”

“…Therefore, doping KDP crystals with amino acid families has been under extensive investigation in recent times because of the favorable enhancement of the NLO properties of the standard KDP crystals. [7][8][9][10][11][12][13] The search for effective NLO materials has shown that L-arginine-based crystals such as L-arginine phosphate monohydrate (LAP), 7 which was first reported by Xu et al, 8 exhibit higher nonlinearity, conversion efficiency, and wider transmission range in comparison with KDP. After this discovery, several amino acid crystals such as L-arginine acetate (LAA), L-arginine chloride monohydrate (LACh), L-arginine hydrochloride monohydrate (LAHCh), L-arginine hydrobromide (LAHBr), L-histidine tetrafluroborate (L-HFB), and L-histidine hydrofluoride dihydrate (LHHF) have been studied.…”

“…After this discovery, several amino acid crystals such as L-arginine acetate (LAA), L-arginine chloride monohydrate (LACh), L-arginine hydrochloride monohydrate (LAHCh), L-arginine hydrobromide (LAHBr), L-histidine tetrafluroborate (L-HFB), and L-histidine hydrofluoride dihydrate (LHHF) have been studied. [7][8][9][10][11][12][13] Better NLO properties than those of the well-known KDP crystal were reported for all of the new combined organic/ inorganic materials.…”

Formation and properties of L-arginine acetate single crystals doped with hydrochloric acid

“…LAA crystals were grown by the slow evaporation method and investigated the effect of NaCl, KCl, glycine and urea (added separately) as impurities and results obtained have been reported [3]. Cu 2+ and Mg 2+ doped LAA crystals show positive photoconductivity and the hardness of the crystal decreases with increasing load both for pure and doped samples [4]. Cu 2+ and Mg 2+ doped LAA were grown by the slow evaporation technique and thermally stabilized crystals were obtained [5].…”