Title of article :
Rational design of organic superconductors through the use of the large, discrete molecular anions M(CF3)4− (M= Cu, Ag, Au) and SO3CF2CH2SF5−
Author/Authors :
Schlueter، نويسنده , , John A. and Geiser، نويسنده , , Urs and Williams، نويسنده , , Jack M. and Dudek، نويسنده , , James D. and Kelly، نويسنده , , Margaret E. and Flynn، نويسنده , , Jason P. and Wilson، نويسنده , , Ronald R. and Zakowicz، نويسنده , , Halina I. and Sche، نويسنده , , Paul P. and Naumann، نويسنده , , Dieter and Roy، نويسنده , , Thomas and Nixon، نويسنده , , Paul G. and Winter، نويسنده , , Rolf، نويسنده ,
Abstract :
A new approach to the synthesis of organic superconductors has recently been pioneered which involves the use of large, discrete, molecular anions as the charge-compensating entities in these charge transfer salts. The organic electron-donor molecule bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) has been electrocrystallized with the novel organometallic M(CF3)4− (M = Cu, Ag, and Au) anions in a variety of 1,1,2-trihaloethane solvents. Over twenty organic superconductors have been synthesized which can be described by the general formula (ET)2M(CF3)4(1,1,2-trihaloethane). These solvated salts are shown to have highly anisotropic physical properties which can be tuned via modifications of each of their three molecular components: ET electron donor molecule, M(CF3)4− anion, and neutral 1,1,2-trihaloethane solvent molecule. Superconductivity has also been observed in an ET salt containing the discrete SF5CH2CF2SO3− anion with an onset temperature near 5.2 K.
