Synthesis, Growth, Structural, Spectroscopic, Thermal and Optical Properties of NLO Single Crystal: L-Threonine Zinc Acetate

A. Puhal Raj ； C. Ramachandra Raja

《Photonics and Optoelectronics》 2卷3期 (2013/07) Pp. 56-64

並列摘要

Synthesis and single crystal growth of nonlinear optical crystal l-threonine zinc acetate (LTZA) is reported and compared with the pure l-threonine in this paper. L-threonine and LTZA crystals are characterized with single crystal and powder XRD, FTIR, UV-Vis-NIR, TG/DTA analyses and SHG test. Single crystals with optically desirable transparency were grown in solution by slow evaporation technique at 35°C using a constant temperature bath (CTB) with an accuracy of ±0.01°C. Single crystal XRD was carried out to examine the crystal system and unit cell parameters. Powder XRD pattern confirms that there is change in the basic structure of materials. The presence of functional groups in the crystal lattice was qualitatively analyzed by FTIR spectrum. Thermal property of grown crystals was reported in the TGA/DTA analyses. Thermal studies revealed that grown crystal LTZA is thermally stable upto 92°C. Optical property of the crystals examined by UV-Vis-NIR studies showed that l-threonine and LTZA crystals are transparent in the range of 200-1100 nm. The second harmonic generation (SHG) efficiency of the LTZA crystal was studied by Kurtz powder method and the efficiency was 3.3 times greater than that of pure KDP and when compared with the parent compound, it was found that efficiency is three times greater than that of l-threonine.

並列關鍵字

Zinc Acetate ； l-threonine ； Crystal Growth