“…The Hg(II), Cd(II) and Zn(II) based hybrid materials having combined desirable physical properties of both organic and inorganic components within the single composite [13] build up through secondary interactions [14]. These hybrids are of interest due to their self-assembled organic-inorganic layered structures which causes variation in their structural, magnetic, optical and electrical properties, particularly since these can be modified by replacement of the metal halide, or amine [15,16]. Hybrid materials with non linear optical (NLO) properties [17] are currently attracting considrable attention because of their potential applications in optoelectric devices, optical switching and tetrahertz (THz) wave generation [18].…”