title: High-Spin Polymers: Ferromagnetic Coupling of S = 1 Hexaazacyclophane Units up to a Pure S = 2 Polycyclophane.
abstract: Triarylamines oxidized to radical cations can be used as stable spins sources for the design of high-spin compounds. Here, we present the synthesis of the polyarylamine-containing hexaazacyclophanes linked via meta-terphenyl bridges. Spins, created after oxidation of the polymer, can be coupled magnetically in cyclophane moieties via meta-phenyl and along the polymer chain via meta-terphenyl units. The formation of a quintet spin state was evidenced by pulsed-EPR nutation spectroscopy. Two exchange coupling constants via both couplers were determined experimentally and corresponded to J/k = 89 K in the cyclophane moiety and j/k = 17 K via meta-terphenyl. Most importantly, in this polymer, four spins can be ferromagnetically ordered via both couplers, which leads to the high spin state.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Lukasz
authors.initials: L
authors.lastname: Skorka
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Kurzep
authors.affiliation: Université Grenoble Alpes, INAC, SyMMES , F-38000 Grenoble, France.|CEA, INAC, SYMMES , F-38054 Grenoble, France.
authors.forename: Timothée
authors.initials: T
authors.lastname: Chauviré
authors.affiliation: Université Grenoble Alpes, INAC, SyMMES , F-38000 Grenoble, France.|CEA, INAC, SYMMES , F-38054 Grenoble, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Dubois
authors.affiliation: Université Grenoble Alpes, INAC, SyMMES , F-38000 Grenoble, France.|CEA, INAC, SYMMES , F-38054 Grenoble, France.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Mouesca
authors.affiliation: Université Grenoble Alpes, INAC, SyMMES , F-38000 Grenoble, France.|CEA, INAC, SYMMES , F-38054 Grenoble, France.
authors.forename: Vincent
authors.identifier: 0000-0002-0855-6412
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