Chemical modeling of high-spin polymers

Aim of project
The aim of this project is the synthesis and characterization of organic materials exhibiting magnetic ordering. We will focus on alternating aromatic polyamines, which can be partially oxidized to radical cations, stable at room temperature. The presence of alternating meta-para-bonding in polymers leads to the localization of radical cations and thus spin coupling. In this study the synthesis of linear and branched poly(m-p-anilines)
containing diff erent solubilizing groups will be performed. To determine the infl uence of partial delocalization of charge carriers on magnetic coupling, linear and branched poly(m-p-p-anilines) will be synthesized as well.

Expected results
The oxidation of alternating aromatic polyamines leads to the formation of radical cations. This process can be
studied using UV-Vis-NIR and EPR spectroscopies. The interaction of spins can cause the formation of high-spin state. We suppose that in case of linear polymers the formation of triplet state with S=1 can be detected, whereas in case of branched polymers the existence of triplet (S=1) and quartet (S=3/2) states can be possible. This type of polymers could become a new class of polymers exhibiting ferromagnetic ordering.