http://www.cnr.it/ontology/cnr/individuo/prodotto/ID169509
Electrochemical, magnetic, and electrical properties of a-w-capped sexithiophene film. Part 3. Conduction in poly(bis-terthienyl-B) (B = ethane, disulfide, diacetylene, ethylene) (Articolo in rivista)
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- Electrochemical, magnetic, and electrical properties of a-w-capped sexithiophene film. Part 3. Conduction in poly(bis-terthienyl-B) (B = ethane, disulfide, diacetylene, ethylene) (Articolo in rivista) (literal)
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- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/cm8023007 (literal)
- Alternative label
Zotti, G.; Vercelli, B.; Berlin, A.; Destri, S.; Pasini, M.C.; Hernández, V.; López Navarrete, J.T. (2008)
Electrochemical, magnetic, and electrical properties of a-w-capped sexithiophene film. Part 3. Conduction in poly(bis-terthienyl-B) (B = ethane, disulfide, diacetylene, ethylene)
in Chemistry of materials
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Zotti, G.; Vercelli, B.; Berlin, A.; Destri, S.; Pasini, M.C.; Hernández, V.; López Navarrete, J.T. (literal)
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- CNR-IENI; CNR_ISTM; CNR-ISMAC; Departamento de Quimica Fisica, Universidad de Ma?laga (literal)
- Titolo
- Electrochemical, magnetic, and electrical properties of a-w-capped sexithiophene film. Part 3. Conduction in poly(bis-terthienyl-B) (B = ethane, disulfide, diacetylene, ethylene) (literal)
- Abstract
- Electrochemical oxidation of bis-terthienyl-B (B = ethane, disulfide, diacetylene, acetylene, ethylene) has been investigated. Monomers without and with 3,3''-dialkylsubstitution are regularly coupled to polymers alternating sexithiophene and B moieties. The corresponding terthienyl homopolymers have also been produced for comparison. The polymers obtained are characterized by cyclic voltammetry, EQCM, UV-vis and FTIR spectroscopy, in-situ ESR and in-situ conductivity.
The conductivities of p-doped polymers with ethane or disulfide bridges fall in a narrow range (1-5x10-2 S cm-1) and are practically the same of a,w-dimethylsexithiophene (1x10-2 S cm-1) suggesting that conduction proceeds without the help of the links via a direct redox hopping between sexithiophene blocks of adjacent polymer chains. In the cases of diacetylene and acetylene conduction changes from redox to bipolaron-type but only in the case of ethylene the conductivity jumps to high values (1-5 S cm-1) corresponding to those of the polymers without the bridging moiety B, i.e. with shorted thiophene rings. DFT calculations of the bridge energy levels account for this result. (literal)
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