Slow magnetization relaxation in a one-dimensional dysprosium-carboxylate compound based on the linear Dy4 units synthesized ionothermally from a deep-eutectic solvent

Abstract

A dysprosium-carboxylate coordination polymer, {[Dy2(2,2′-bpdc)3(e-urea)(H2O)](e-urea)}n (1) (2,2′-bpdc2−=2,2′-biphenyldicarboxylate and e-urea=ethyleneurea), has been synthesized using a deep-eutectic solvent of choline chloride/e-urea. Four Dy3+ ions are linked by the carboxylate oxygen atoms of the 2,2′-bpdc2− ligands to form a linear Dy4 unit, which is further linked by the carboxylate groups of the 2,2′-bpdc2− ligands to give a rare example of one-dimensional chain based on the linear Dy4 secondary building units. Detailed static and dynamic magnetic analysis of 1 revealed that 1 exhibits a slow magnetic relaxation behavior.