A new BEDT-TTF salt and polypyrrole films containing the chiral polyoxometalate [H 4Co 2Mo 10O 38] 6

• Published in: Synthetic metals Vol. 154; no. 1; pp. 241 - 244
• Main Authors: Coronado, E., Curreli, S., Giménez-Saiz, C., Gómez-García, C.J., Roth, J.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.09.2005; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Bis(ethylenedithio)tetrathiafulvalene; Chiral polyoxometalates; Electrical properties; Exact sciences and technology; Hybrid materials; Physicochemistry of polymers; Polymerization; Polymers and radiations; Polypyrrole; Radical salts; Radical salts; Electrical properties; Hybrid materials; Bis(ethylenedithio)tetrathiafulvalene; Polypyrrole; Chiral polyoxometalates; Heteropolysalt; Electrical conductivity; Bis(ethylenedithio)tetrathiafulvalene; Polypyrrole; Chiral polyoxometalates; Hybrid materials; Radical salts; Temperature effect; Chiral compound; Cobalt complex; Experimental study; Electrochemical polymerization; Free radical; Conducting polymers; BEDT-TTF; Morphology; Preparation; Doped polymer; Charge transfer compound; Molybdenum complex; Pyrrole polymer; Crystalline structure
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2005.07.063

The chiral polyoxometalate [H 4Co 2Mo 10O 38] 6− has been used in the preparation of hybrid materials in the form of crystals or polymeric films. A new radical salt of the donor bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) containing the two enantiomers of this polyoxometalate has been obtained by electrocrystallization. This radical salt shows semiconducting behavior with room temperature conductivity of 9 S.cm −1 and activation energy of 40 meV. Polypyrrole films doped with a racemic mixture of polyoxometalates and also the enantiomerically pure (+) 589-[H 4Co 2Mo 10O 38] 6− have been prepared electrochemically. Circular dichroism experiments suggest that the chiral polyoxometalates do not induce macroasymmetry into the polypyrrole chains during polymerization. Conductivities at room temperature of these polymer films range between 36 and 49 S.cm −1.