Synergistic construction of highly symmetrical lanthanide single-ion magnets using neutral phosphoryl and anionic thiocyanate ligands

Abstract

coordination in the equatorial plane of Dy2 than that of Dy1, indicating that Dy2 has stronger axial anisotropy and a weaker transverse field than Dy1. Consistent with the above structural analysis, compound 2 exhibits a coexistence of QTM and magnetic relaxation through the second excited state under zero dc field, with a relaxation energy barrier of 58 K, higher than that of compound 1, and exhibits butterfly-shaped hysteresis loops below 7 K, in contrast to the weak hysteresis at 2 K for 1. Therefore, we utilized 1 and 2 as a class of model complexes to explore the significant impact of local distortion of the axially compressed pentagonal bipyramidal coordination geometry on single-ion magnetic performance under extremely similar coordination environments.