Synthesis, growth, structure, and characterization of thiourea-bridged polymeric complex: di-μ-thioureabis(thiocyanato)cobalt(II)

Autor: Sp. Meenakshisundaram, K. Muthu, M. Rajasekar, G. Madhurambal, V. Kanagarajan, S. C. Mojumdar, V. Meenatchi
Rok vydání: 2014
Předmět:
Zdroj: Journal of Thermal Analysis and Calorimetry. 119:945-952
ISSN: 1588-2926
1388-6150
DOI: 10.1007/s10973-014-4245-x
Popis: Single crystals of di-μ-thioureabis(thiocyanato)cobalt(II), Co(NCS)2(tu)2 (tu—thiourea) are grown by slow evaporation of a mixed solvent system water–methanol (1:1, v/v) containing thiourea, potassium thiocyanate, and cobalt chloride (1:1:0.5) at room temperature. The dark brown plate-like crystals belong to triclinic system with space group $$P\overline{1}, $$ and the cell parameters are a = 3.8469(7) A, b = 7.5749(13) A, c = 10.1184(17) A, α = 92.599(8)°, β = 98.036(8)°, γ = 104.132(7)°, V = 282.15(9) A3, and Z = 1. The cobalt atom lies at the center of symmetry with four bridging thiourea molecules. The powder X-ray diffraction study reveals the crystallinity of the material. The complex formation is evidenced by the vibrational patterns in Fourier transform infrared spectrum. The scanning electron microscopy study reveals the surface morphology of the metal–thiourea complex. Thermogravimetric and differential thermal analysis shows that the complex is stable up to the melting point. The crystal is further characterized by UV–Vis and mechanical studies.
Databáze: OpenAIRE
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