title: High-spin radical cations of alternating poly(m-p-anilines).
abstract: Three alternating poly(m-p-anilines) have been synthesized via palladium-catalyzed amination reactions. Polymers were oxidized to radical cations by the use of chemical and electrochemical methods. The presence of radical cations was manifested by the appearance of two new bands in UV-vis spectra and a strong EPR signal. Moreover, EPR spectra at low temperatures confirmed the formation of a high-spin state. The magnetization measurements of polymers oxidized to radical cations revealed the paramagnetic-type behavior with weak antiferromagnetic interactions. Radical cations underwent the degradation processes in the presence of air, which led to the decrease of spin concentration.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland. ikulsz@ch.pw.edu.pl
authors.forename: Irena
authors.initials: I
authors.lastname: Kulszewicz-Bajer
authors.forename: Magorzata
authors.initials: M
authors.lastname: Zagórska
authors.forename: Ireneusz
authors.initials: I
authors.lastname: Wielgus
authors.forename: Mariusz
authors.initials: M
authors.lastname: Pawłowski
authors.forename: Jacek
authors.initials: J
authors.lastname: Gosk
authors.forename: Andrzej
authors.initials: A
authors.lastname: Twardowski