Synthesis, growth, spectral, optical and thermal properties of a novel metal-organic family single crystal: Bis (thiocyanato) cobalt(II) di thiourea

Single crystals of bis(thiocyanato) cobalt(II) di thiourea [Co(NCS)(2)(N2H4CS)(2)]; BTCT were grown from an aqueous solution using slow evaporation technique for the first time. Interestingly, Co2+ ion present in the crystalline compound connects two N atoms of thiocyanate and four S atoms of thiourea ligands. The bridging thiourea ligands link Co ions into a one dimensional polymeric chain along [1 00] direction. Single crystal XRD shows that the BTCT crystal belongs to triclinic system with the space group P (1) over bar. BTCT single crystals were subjected to FT-IR, Laser Raman, UV vis, CHNS, TG-DTA and DSC studies. The optical study shows that the UV cut-off wavelength of BTCT in ethanol water mixed solvent is about 310 nm. The thermal analysis of BTCT reveals that the sample is thermally stable up to 196.01 degrees C. The VSM study shows that Co2+ in BTCT possesses higher coercivity (32.4141 mu Ci) and retentivity (654.62E-6 emu/g) than Mn2+ of [Hg(N2H4CS)(4)Mn(SCN)(4)]; TMTM. (C) 2016 Elsevier GmbH. All rights reserved.