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

Jun-ichi Yamada Department of Material Science, Graduate School of Science, Himeji Institute of Technology, Kouto, Kamigori-cho, Ako-gun, Hyogo, JapanCorrespondence[email protected]

Reiji Hayashi Department of Material Science, Graduate School of Science, Himeji Institute of Technology, Kouto, Kamigori-cho, Ako-gun, Hyogo, Japan

Hiroki Akutsu Department of Material Science, Graduate School of Science, Himeji Institute of Technology, Kouto, Kamigori-cho, Ako-gun, Hyogo, Japan

Shin'ichi Nakatsuji Department of Material Science, Graduate School of Science, Himeji Institute of Technology, Kouto, Kamigori-cho, Ako-gun, Hyogo, Japan

Hiroyuki Nishikawa Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo, Japan

Isao Ikemoto Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo, Japan

Koichi Kikuchi Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo, Japan

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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.

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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.

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