Improving the single-molecule magnet properties of two pentagonal bipyramidal Dy3+compounds by the introduction of both electron-withdrawing and -donating groups

Modifying the electron withdrawing F atoms on the pyridine rings and the electron donating –CH 3 groups on the phenolic hydroxyl rings to improve the SMM behavior of two mononuclear Dy 3+ compounds obtained from the ligand H 2 bmbpen-F.