A new approach in the design of organic superconductors

J. Yamada

doi:doi:10.1051/jp4:2004114103

Numéro		J. Phys. IV France Volume 114, April 2004


Page(s)		439 - 443
DOI		https://doi.org/10.1051/jp4:2004114103

J. Phys. IV France 114 (2004) 439
DOI: 10.1051/jp4:2004114103

A new approach in the design of organic superconductors

J. Yamada

Department of Material Science, Graduate School of Science, Himeji Institute of Technology, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
e-mail: yamada@sci.himeji-tech.ac.jp

Abstract
The preparation of charge-transfer (CT) salts of DODHT [(1,4-dioxane-2,3-diyldithio) dihydrotetrathia-fulvalene], BDH-TTP [2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene] and BDA-TTP [2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene] has been investigated to develop new organic superconductors. The DODHT and BDA-TTP donors give organic superconductors (DODHT) ₂BF $_{4}\cdot$ H ₂O and (BDA-TTP) ₂X (X = GaCl ₄ and FeCl ₄) under applied pressures, whereas (BDH-TTP)Br _0.88 and (BDA-TTF) ₂X (X = BF ₄, BF $_{4}\cdot$ H ₂O and ClO ₄) fail to exhibit superconductivity at ambient pressure. Key words. Organic superconductor - $\pi$ -electron donor - $\sigma$ -bond framework - loose donor packing motif.