Synthesis crystal growth and properties of the charge transfer complex adduct of 2-nitro aniline with picric acid - An organic non-linear optical material

The organic NLO material 2-nitro aniline and picric acid (2NAP) was synthesized, needle shaped single crystals of dimension 10 x 1 x 0.8 mm(3) were grown by slow evaporation solution growth technique from the saturated solution of the title compound in chloroform at ambient temperature. The material was characterized through elemental analysis, powder XRD, H-1 NMR, C-13 NMR and FTIR techniques. The various planes of reflection have been identified from the XRD powder pattern. The formation of the charge transfer complex was confirmed by UV-VIS spectroscopy. The thermal stability of the crystals was investigated using TG/DTA analyses techniques. The second harmonic generation (SHG) efficiency of the material was estimated using Nd: YAG laser as source. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.