Hopping conduction in 3,4-cycloalkylpolypyrrole perchlorates: A model study of conductivity in polymers:

✍ Scribed by T.A. Ezquerra; J. Rühe; G. Wegner

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 334 KB
• Volume: 144
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(88)87116-1

✦ Synopsis

The conductivity of 3,4-cycloalkyl-substituted polypyrrole perchlorates has been analyzed using hopping theory. The localization length of the charge carriers was found to be 0.8 nm, the actual conductivity at constant temperature being exponentially dependent on the minimum distance, R, between adjacent chains. R can be reasonably estimated from molecular models and was systematically varied between 0.38 nm (unsubstituted polypyrrole) and 1.38 nm (decamethylene chain attached in 3,4-position). The conduction is activated in the temperature range 150-300 K, the activation energy varying systematically from 0.0 12 to 0.066 eV on increasing R from 0.38 to 1.38 nm.