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Electron Paramagnetic Resonance and Proton Nuclear Magnetic Resonance Relaxations in Polyanilines

✍ Scribed by Laura Pavesi; Fabio Tedoldi

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
289 KB
Volume
8
Category
Article
ISSN
1042-7147

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✦ Synopsis

Magnetic resonance measurements, including nuclear magnetic resonance T 1 and T 1 and electron paramagnetic resonance T 1e and T 2e relaxation times are presented for polyanilines prepared according to a modification of the conventional synthesis and doping methods, showing a conductivity higher than that of standard HCl-polyaniline polymers. The results, obtained as a function of the doping rate, are interpreted in terms of one-dimensional diffusive motions of spin and charge carriers. High anisotropy in the spin diffusion rate is found. In the framework of the model of single metallic polymer chains, this leads to the conclusion that in our polyanilines the mechanism of conduction is more markedly one-dimensional.

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