title: Formation of High-Spin States (S = 3/2 and 2) in Linear Oligo- and Polyarylamines.
abstract: This article describes the study of a linear trimer and three polyarylamines PB1-3 containing a 3,4'-biphenyl ferromagnetic coupler. The synthesis of the model compound (trimer) and the polymers has been presented. The formation of radical cations was studied using electrochemical and optical (UV-vis) methods. The chemical oxidation of these compounds leads to the creation of high-spin states, evidenced by pulsed EPR nutation spectroscopy. A quartet spin state is observed for the trimer model compound, and its J exchange coupling constant has been measured experimentally (J/k = 11.8 K) and compared quantitatively to DFT calculations. Most importantly, quartet and quintet spin states have been formed for PB3 and PB2, respectively. These last two doped polymers thus exhibit the highest spin states observed to date for linear polyarylamine compounds.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Skórka
authors.affiliation: Universite Grenoble Alpes, INAC, SCIB , F-38000 Grenoble, France.|CEA, INAC, SCIB , F-38054 Grenoble, France.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Mouesca
authors.affiliation: Universite Grenoble Alpes, INAC, SCIB , F-38000 Grenoble, France.|CEA, INAC, SCIB , F-38054 Grenoble, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Dubois
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Szewczyk
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Ireneusz
authors.initials: I
authors.lastname: Wielgus
authors.affiliation: Universite Grenoble Alpes, INAC, SCIB , F-38000 Grenoble, France.|CEA, INAC, SCIB , F-38054 Grenoble, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Maurel
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Irena
authors.initials: I
authors.lastname: Kulszewicz-Bajer