Physico-Chemical Characterization, Opto Electronic Investigation and Vibrational Analysis on Coordinate Covalent Complex; Bis (Thiourea) Nickel Bromide (BTNB) Using Experimental and Computational Tools

Nonlinear optical (NLO) frequency conversion materials have a significant impact on laser technology, optical communication and optical storage technology. The search for new frequency conversion materials over the past decade has led to the discovery of many semi organic NLO materials with high nonlinear susceptibilities. Among the semi organic NLO materials metal complexes of the thiourea having lower cut off wavelengths, applicable for frequency conversion are of very interest because both organic and inorganic components in it contribute specifically to the process of SHG [1-7]. In the present work, metal replacement is studied by taking a reported NLO crystal Bis (thiourea) Cadmium Bromide [8]. Here the metal cadmium is replaced by nickel which is more active electro chemically.