Crystal structures and electrical conductivities controlled by CH/n interactions

S. Kimura; H. Suzuki; T. Maejima; M. Suto; K. Yamashita; S. Ichikawa; H. Mori; H. Moriyama; T. Mochida; Y. Nishio; K. Kajita

doi:doi:10.1051/jp4:2004114122

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


Page(s)		521 - 522
DOI		https://doi.org/10.1051/jp4:2004114122

J. Phys. IV France 114 (2004) 521
DOI: 10.1051/jp4:2004114122

Crystal structures and electrical conductivities controlled by CH/n interactions

S. Kimura^{1, 1, 2, 1}, H. Suzuki¹, T. Maejima^{1, 1, 3}, M. Suto^{1, 1, 4}, K. Yamashita^{1, 1, 4}, S. Ichikawa^{1, 1, 3}, H. Mori^{1, 1, 2}, H. Moriyama³, T. Mochida³, Y. Nishio⁴ and K. Kajita⁴

¹ Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
² CREST, JST
³ Department of Chemistry, Toho University, Funabashi, Chiba 274-8510, Japan
⁴ Department of Physics, Toho University, Funabashi, Chiba 274-8510, Japan

Abstract
A series of new TTF derivatives, CnDT-EDO-TTF ( n= 5,6), CnDT-EDT-TTF ( n= 5,6), and CnDTP-TTF ( n= 5,6) have been synthesized. As for the CnDT-EDO-TTF salts, the intermolecular CH $\cdot \cdot \cdot$ O interactions construct the pseudo-2D electronic state, which stabilizes the metallic character down to 1.3 K. The sulfur based C5DT-EDT-TTF salts preferred the dimeric $\beta$ '-type structure, which could be Mott insulators. The pyrazino-fused donor C5DTP-TTF afford a variety of donor arrangements by the S $\cdot \cdot \cdot$ N interaction and the steric hindrance: $\kappa$ -(C5DTP-TTF) ₂X (X= AsF ₆, SbF ₆) are semiconductors, whereas $\beta$ "-(C5DTP-TTF) ₂TaF ₆ reveal the metallic down to 150 K. Key words. Synthesis, TTF derivative, charge-transfer complex, crystal structure, CH/n interaction.