Crystal Structures of Highly Conducting Iodine Complexes of TTM-TTP

• Published in: Bulletin of the Chemical Society of Japan Vol. 67; no. 3; pp. 661 - 667
• Main Authors: Mori, Takehiko, Inokuchi, Hiroo, Misaki, Yohji, Yamabe, Tokio, Mori, Hatsumi, Tanaka, Shoji
• Format: Journal Article
• Language: English
• Published: Tokyo The Chemical Society of Japan 01.03.1994; Chemical Society of Japan
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Conductivity of specific materials; Electronic transport in condensed matter; Exact sciences and technology; Heterocyclic compounds; Organic compounds; Physics; Polymers; organic compounds (including organic semiconductors); Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; X-ray diffraction and scattering; Temperature dependence; Five membered ring; Organic cation; Iodides; Molecular structure; Organic conductors; XRD; Experimental study; Organic sulfide; Thermoelectric properties; Sulfur heterocycle; Bicyclic compound; Property structure relationship; Charge transfer complexes; Organic compounds; Electric conductivity; Crystal structure
• DOI: 10.1246/bcsj.67.661
• ISSN: 0009-2673

Methylthio substituted bis-fused tetrathiafulvalene, TTM-TTP (2,5-bis[4,5-bis(methylthio)-1,3-dithiol-2-ylidene]-1,3,4,6-tetrathiaphentalene) makes three phases of iodine complexes: (TTM-TTP)I3, α-(TTM-TTP)2I3, and β-(TTM-TTP)2I3. The 1 : 1 complex exhibits high conductivity, 700 S cm−1 at room temperature, and is metallic down to about TMI = 160 K. This complex has uniform columns of the donor molecules. In the semiconducting α-(TTM-TTP)2I3, one quarter of the donors is incorporated in the anion sheet, and the sides of the other trimeric donors are blocked by the anion sheets. β-(TTM-TTP)2I3 shows metallic conductivity down to TMI = 20 K.