The chemical-physical properties of conductive polymer thin films are strictly related to the structure and conformations of the chains in the polymer lattice. Crystallinity, chain length, substituents, doping level are just some of the many variables that play a role in the final properties of the polymer films. Another key factor is the orientation of the chains inside the thin film. A polymer chain is anisotropic, and so are its properties. However, a lattice where the chains are randomly arranged will have the same properties no matter which direction we measure them, whereas an oriented lattice will show different properties related to the preferential order of the macromolecular structure. We used different electric fields to align the macromolecules of a chiral conductive polymer (CCP), capable of self-organizing in chiral helixes in the solid state, and we studied its effect on the anisotropy of the obtained thin films, on the structure of the aggregates and on the conductive properties of the polymer by means of different instrumental techniques. All the measurements showed a preferential alignment of the polymer chains after the process under applied electric field. Circular dichroism was used to probe the chirality of the polymer aggregates, and it was found that the field strongly influences the helical superstructures of the CCP. The use of the electric field to fine tune the helical structures of this chiral polymer stands out as an interesting possibility which we are currently investigating.

Effect of the Electric Field on the Structure of a Chiral Conductive Polymer Thin Film / Tassinari, Francesco; Mathew, S. P.; Fontanesi, Claudio; Schenetti, Luisa; Mucci, Adele; Naaman, R.. - ELETTRONICO. - 1:(2014), pp. 429-429. (Intervento presentato al convegno XXV Congresso Nazionale della Società Chimica Italiana tenutosi a Arcavacata di Rende nel 7-12 settembre 2014).

Effect of the Electric Field on the Structure of a Chiral Conductive Polymer Thin Film

TASSINARI, FRANCESCO;FONTANESI, Claudio;SCHENETTI, Luisa;MUCCI, Adele;
2014

Abstract

The chemical-physical properties of conductive polymer thin films are strictly related to the structure and conformations of the chains in the polymer lattice. Crystallinity, chain length, substituents, doping level are just some of the many variables that play a role in the final properties of the polymer films. Another key factor is the orientation of the chains inside the thin film. A polymer chain is anisotropic, and so are its properties. However, a lattice where the chains are randomly arranged will have the same properties no matter which direction we measure them, whereas an oriented lattice will show different properties related to the preferential order of the macromolecular structure. We used different electric fields to align the macromolecules of a chiral conductive polymer (CCP), capable of self-organizing in chiral helixes in the solid state, and we studied its effect on the anisotropy of the obtained thin films, on the structure of the aggregates and on the conductive properties of the polymer by means of different instrumental techniques. All the measurements showed a preferential alignment of the polymer chains after the process under applied electric field. Circular dichroism was used to probe the chirality of the polymer aggregates, and it was found that the field strongly influences the helical superstructures of the CCP. The use of the electric field to fine tune the helical structures of this chiral polymer stands out as an interesting possibility which we are currently investigating.
2014
XXV Congresso Nazionale della Società Chimica Italiana
Arcavacata di Rende
7-12 settembre 2014
Tassinari, Francesco; Mathew, S. P.; Fontanesi, Claudio; Schenetti, Luisa; Mucci, Adele; Naaman, R.
Effect of the Electric Field on the Structure of a Chiral Conductive Polymer Thin Film / Tassinari, Francesco; Mathew, S. P.; Fontanesi, Claudio; Schenetti, Luisa; Mucci, Adele; Naaman, R.. - ELETTRONICO. - 1:(2014), pp. 429-429. (Intervento presentato al convegno XXV Congresso Nazionale della Società Chimica Italiana tenutosi a Arcavacata di Rende nel 7-12 settembre 2014).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1038918
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