Philippe Leriche

Linearly extended tetrathiafulvalene analogues with fused thiophene units as π-conjugated spacers

A new series of linearly extended tetrathiafulvalene analogues with thienothiophene and dithienothiophene π-conjugating spacers has been synthesized. Electronic absorption spectra present a vibronic fine structure typical for rigid conjugated systems. Investigation of the electrochemical behaviour of the new donors by cyclic voltammetry reveals the successive generation of stable radical cation and dication species. The crystallographic structure of a single crystal of a dication salt of TT-TTF(ClO4)2 has been analysed by X-ray diffraction. The dication presents a syn conformation stabilised by S⋯S intramolecular interactions. The quinoid structure expected for the spacer for the +2 oxidation state is clearly revealed by the bond lengths.

Poly(3,6-dimethoxy-thieno[3,2-b]thiophene): a possible alternative to poly(3,4-ethylenedioxythiophene)(PEDOT)

Electropolymerization of the title compound leads to a conjugated polymer with redox potential, band gap, optical transparency in the doped state and stability similar to those of PEDOT.

New extended analogues of TTF via triethylphosphite-mediated reaction

New extended derivatives of TTF bearing cyanoethylsulfanyl or furan groups which cannot be obtained by Wittig-type reaction with Akibas reagent have been synthesized using a clean, cheap-step and rapid methodology; their electrochemical and optical behavior are studied.

Bis(trisubstituted tetrathiafulvalenyl) disulfides: Disulfide-bridged TTF dimers

Abstract The title compounds are synthesized, using the oxidative coupling of TTF thiolates. The disulfide linkage induces approximate orthogonality between the two TTF units, while maintaining virtually unchanged their electrochemical properties.