Journal of Physical Chemistry B, Vol.121, No.16, 4293-4298, 2017
High-Spin Polymers: Ferromagnetic Coupling of S=1 Hexaazacyclophane Units up to a Pure S=2 Polycyclophane
Triarylainines 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 polyarylatnine-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, ulsed-EPR imitation spectroscopy. Two exchange coupling constants via both couplets were determined experimentally and - corresponded to J/k = 89 Kin the cyclophane moiety and j/k = 17 K via meta-terphenyl. Most importantly, in this polymer, four spins can be ferroniagnetically ordered via both couplers, which leads to the high spin state.