New Organic Conductors and Superconductors Based on Dihydro-TTF (DHTTF) Donors

ABSTRACT

The synthesis of dihydrotetrathiafulvalene (DHTTF) donors and the preparation of their charge-transfer (CT) salts have been undertaken to develop new organic metals and superconductors. The molecular structures of methylenedithio-DHTTF (MDHT), 1,4-dioxane-2,3-diyldithio-DHTTF (DODHT), and methylmethylidenedithio-DHTTF (Me-MDHT) are secured by X-ray crystallographic analyses. These DHTTF donors provide CT salts characterized by a wide range of conducting behavior from semiconducting to metallic and superconducting. The crystal structures of CT salts from each category are described.

Keywords:

• crystal structures
• dihydro-TTF donors
• molecular structures
• organic conductors
• organic superconductors

Notes

†V vs. saturated calomel electrode (SCE), 0.1 M n-Bu₄NClO₄ in PhCN, Pt electrode, at room temperature, under nitrogen, scan rate 50 mV s⁻¹.