Premium
Electrical and magnetic properties of conjugated schiff base polymers
Author(s) -
Li Wenguang,
Wan Meixiang
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19961107)62:6<941::aid-app9>3.0.co;2-p
Subject(s) - magnetic susceptibility , chemistry , curie temperature , schiff base , materials science , phenylene , condensed matter physics , electrical resistivity and conductivity , electron paramagnetic resonance , conjugated system , nuclear magnetic resonance , polymer chemistry , polymer , crystallography , ferromagnetism , organic chemistry , physics , quantum mechanics
Two new conjugated poly‐Schiff bases (PPpP and PPmP) were synthesized by polycon‐densation of p‐phenylene diamine or m‐phenylene diamine with 2,6‐pyridine dicarboxal‐dehyde. PPpP and PPmP can from charge transfer complexes with iodine. Maximum conductivity of PPpP‐iodine complex at room temperature is 10 −6 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 (χ c ) and Pauli magnetic susceptibility (χ p ). Its Curie constant (C), Curie spin concentration (N c ), and density of state at the Fermi level also depend on doping degree. © 1996 John Wiley & Sons, Inc.