Zi-Han Li published a new article on Chem. Eur. J. Congratulations!

Title: Air-Stable Hexagonal Bipyramidal Dysprosium(III) Single-Ion Magnets with Nearly Perfect D6h Local Symmetry

Abstract: 

Local eight-coordination of the Dy(III) with D6h symmetry receives much expectation for high-performance single-molecule magnets (SMMs) due to the simultaneous fulfillment of the magnet-ic axiality and high coordination number (a requisite for the air sta-bility). But the experimental realization is challenging due to the required restriction of six coordination atoms in the equatorial plane of the hexagonal-bipyramid, which is usually too crowded for the central Dy(III) ion. Here we show by using the hexaaza macrocy-clic Schiff base ligand and fine-tuning the axial alkoxide/phenol type ligands, a family of hexagonal-bipyramidal Dy(III) complexes, namely [DyIII(LE)(Cl)2(H2O/CH3OH)]Cl·8MeOH 1, [Dy-III(LE)(C6F5O)2(H2O)](BPh4)·2THF·2, [DyIII(LE)(PhO)2](BPh4)·4THF 3, [DyIII(LE)(4-MeO-PhO)2](BPh4)·3THF 4, [Dy-III(LE)(naPhO)2](BPh4)·4THF 5 and [Dy-III(LE)(Ph3SiO)2](BPh4)·4THF 6 (LE = (2E,4R,5R,6E,9E,11R,12R,13E)-4,5,11,12-tetraphenyl-3,6,10,13-tetraaza-1,8(2,6)-dipyridina-cyclotetradecaphane-2,6,9,13-tetraene), can be isolated. Among them, complexes 3, 4 and 5 possess nearly perfect D6h local symmetry. Complex 4 shows the highest effective magnetic reversal barrier 1338(3) K and an open hysteresis temperature 6 K at the field sweeping rate of 1.2 mT/s, which represents a new record for D6h SMMs.