Synthesis, Growth and Characterization Aspects of Non-linear Organometallic Single Crystals of BCTZ

Abstract

Bis[(18-Crown-6)Potassium][Tetrakis(isothiocyanato)Zinc(II)],[(18C6)K]2 [Zn(SCN)4] (BCTZ), a novel organo-metallic crystal, was grown from ethanol-water mixed solvent by a slow evaporation solvent technique which were found to be crystallized in a non centrosymmetric space group pna21 of an orthorhombic system. The spectroscopic, optical, mechanical properties of [(18C6)K]2 [Zn(SCN)4]; BCTZ were investigated by FT-IR, FT-Raman, UV-Vis-NIR techniques. The hardness of the grown crystal of BCTZ was measured by Vickers hardness measurement tester. The purity of the crystalline compound was verified by HPLC studies. The UV-Vis study reveals that the title compound was optically transparent in the visible region, which is suitable for non-linear optical applications. Introduction. The application of single crystals in the newest technology is evident from the recent developments in semiconductors, polarizers, transdures and infrared detectors etc. The organo-metallic thiocyanate complexes are appropriate for recognizing blue-violet light by frequency doubling of laser radiation. The experiments conducted by the eminent scientists all over the world strongly favour the possible use of this class of materials for various non-linear optical applications and photonics device fabrications [1]. It is fascinating to note that the metal thiocynate complex family crystalline compounds suggest a mixture of molecular structures in turn these complexes are capable of efficient frequency conversion of IR radiation to ultraviolet wavelength. In meta thiocynate complexes, the thiocynate has the capability to interconnect metal ions with its own donors S and N [2-4].