“…In recent years, development of materials with optimized nonlinear optical (NLO) properties has gained much impetus in applied and fundamental research owing to their potential uses in diverse disciplines including materials science, medicine, biophysics, chemical dynamics, atomic, molecular, solid-state physics, and surface interface sciences . The NLO materials are currently attracting considerable interest because of their large applications in telecommunication sector, optics, and optoelectronic devices. − Many efforts have been made in the designing of different materials including polymer systems, natural and synthetic nanomaterials, organic and inorganic semiconductors, and molecular dyes − that exhibit NLO responses. Among these NLO materials, metal free organic NLO materials are extensively explored owing to their optical modulation, optical switching, better signal processing, frequency shifting, and conversion.…”