The invention of high intense laser has opened many innovative ways to explore the nature of matter and its interaction with optical radiation. In recent years much attention has been devoted to optical materials with high second order nonlinearities owing to their potential uses in numerous modern research fields such as Non linear optics (NLO), Electro optic modulation (EOM), high speed telecommunications and terahertz (THz) wave generation and detection, etc. The growing demand for new NLO materials is mainly driven by the materials chemistry, in view of the fact that it sturdily...