A Novel, Nonelectrochemical Synthesis of the Organic Superconductor κ-(BEDT-TTF)2Cu(NCS)2

Article abstract of DOI:10.1246/bcsj.66.32

Bis(ethylendithio)tetrathiafulvalene (BEDT-TTF or ET) can be oxidized with Cu(SCN)2 to yield superconducting, microcrystalline κ-(ET)2CU(NCS)2.The reaction is achieved either by heating a suspension of the reactants in various organic solvents or by ultrasound agitation at room temperature.The formation of the title compound was established by X-ray diffractograms, FT-IR and ESR spectroscopy.Susceptibility measurements revealed superconducting transition temperatures of 9.5-10 K.The clearly observed Meissner effect suggests superconductivity to be a bulk property of the so-obtained powder samples.