A family of 3d-4f Cu-Ln ladder-like complexes: Synthesis, structures and magnetic properties

A family of rare 2p-3d-4f ladder-like one-chain complexes namely [LnCu(hfac)(5)NIT-Ph-p-OCH(2)trz center dot 0.5C(6)H(14)](n) (Ln = Er (1), Ho (2), Yb (3); NIT-Ph-p-OCH(2)trz = 2-(4-((1H-1,2,4-triazol-1-yl)methoxy)phenyl)-4,4,5,5-tetra- methylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetonate) have been successfully synthesized simultaneously through reacting nitronyl nirtroxide radical NIT-Ph-p-OCH(2)trz with Cu(hfac)(2) and Ln(hfac)(3). The structures of complexes of 1-3 were elucidated by single-crystal X-ray structural analysis and the result show that all complexes feature ladder-like chain structures. Nonzero out-of-phase signals are observed for Ho derivatives (2) indicating single-chain magnet behavior. (C) 2020 Published by Elsevier Ltd.