New magnetic conductors and superconductors based on BEDT-TTF and BEDS-TTF

Here we present our last results in the search for multifunctionality in conducting molecular materials obtained by combining paramagnetic molecular complexes with organic donors to produce paramagnetic molecular metals and superconductors. The structural and physical characterization of two new molecular paramagnetic superconductors ET4[H3OM(C2O4)(3)]center dot PhBr (M-III = Cr and Fe) are presented (ET = BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene). These salts present a superconductor transition at T-c = 1.5 and 4.0 K, respectively and very anisotropic critical fields H-c2a approximate to H-c2b approximate to 0.5 T and H-c2c approximate to 8 T for the Fe derivative. We will also present the structural and physical characterization of two new metallic paramagnetic systems: ET4[H3OM(C2O4)(3)]center dot PhCl (M = Cr-III and Fe-III) and five different new semiconducting paramagnets obtained with the donor bis(ethylenediselena)tetrathiafulvalene (BEDS-TTF = BEST) and [M(C2O4)(3)](3-) (M = Cr-III and Fe-III) complexes.