Electrical and magnetic properties of conjugated schiff base polymers

✍ Scribed by Wenguang Li; Meixiang Wan

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 534 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961107)62:6<941::aid-app9>3.0.co;2-p

✦ Synopsis

SYNOPSIS

Two new conjugated poly-Schiff bases (PPpP and PPmP) were synthesized by polycondensation of p-phenylene diamine or m-phenylene diamine with 2,6-pyridine dicarboxaldehyde. PPpP and PPmP can form charge transfer complexes with iodine. Maximum conductivity of PPpP-iodine complex at room temperature is S/cm, which is 2 orders of magnitude higher than that of PPmP-iodine complex. Electronic spin resonance measurements discovered that there are stable radicals in both charge transfer complexes; and g value, line width, and spin concentration depend on doping degree. Magnetic susceptibility of charge transfer complexes of PPmP-iodine is composed of Curie magnetic susceptibility (x,) and Pauli magnetic susceptibility (x~). Its Curie constant (C), Curie spin concentration (Nc), and density of state at the Fermi level also depend on doping degree.