J. Phys. IV France
Volume 114, April 2004
Page(s) 505 - 507

J. Phys. IV France
114 (2004) 505
DOI: 10.1051/jp4:2004114117

Association of poly(tetrathiafulvalenylethynyl)benzenes in neutral and cationic states

M. Hasegawa1, Y. Kuwatani1 and M. Iyoda1, 1

1  Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan

We synthesized a series of poly(tetrathiafulvalenylethynyl)benzenes and investigated their association properties in neutral and cationic states. The association constants of 1a and 2a with butylthio substituents in CDCl 3 solution are 1.4 M -1 and 11.0 M -1 at 20°C, respectively. Cationic species derived from 1, 2 and 3 more easily aggregate in solution. The cation radicals prepared by doping of 1 and 2 with iodine show electrical conductivities as semiconductors. Key words. TTF - association - mixed valence state - $\pi $ dimer - conductivity.

© EDP Sciences 2004