Fig. 6
From: Air-stable redox-active nanomagnets with lanthanide spins radical-bridged by a metal–metal bond
Electron transfer properties of {Ln2} molecules. a Cyclic voltammogram of {Er2} in o-dichlorobenzene solution as a representative example of the {Ln2} series. b Schematic description of the single-electron reduction and oxidation of {Ln2} compounds showing addition of one electron to the Ln–Ln bond and removal of one electron from the fullerene cage. c The first oxidation (red dots) and reduction (blue dots) potentials of {Ln2} in o-dichlorobenzene/TBABF4 solution as a function of ionic radius of Ln (for {TbY}, the average radius of Tb3+ and Y3+ is used; lines are shown to guide the eye); d 1H NMR spectra of {Tb2}–, {Ho2}– and {Er2}– anions in d4-o-dichlorobenzene (colored lines) in comparison to the spectra of neutral compounds (light gray lines). e Schematic description of the spin-valve effect of the {Ln2} molecule: in a certain bias range limiting the current to the metal-based LUMO, only the electrons with their spin antiparallel to the spin of the molecule can pass through
