“…Semi-organic class of crystals have been proposed as a new approach for the materials with interesting nonlinear optical properties for technologically important devices due to their physical, chemical and mechanical stability [3,4]. The semi-organic nonlinear optical (NLO) crystals have also been given a great deal of interest due to their superior properties such as high susceptibility, faster response, capability of designing components on the molecular level and large NLO co-efficient over the corresponding inorganic counterparts [5,6]. NLO properties of semi-organic materials are currently under intense investigation, triggered by potential applications in fabricating efficient devices, due to their incorporated advantages of both organic and inorganic crystals [7].…”