Macrocyclic {3d–4f} SMMs as building blocks for 1D-polymers: selective bridging of 4f ions by use of an O-donor ligand

Abstract

Crystallisation of the tetranuclear 3d–4f Single-Molecule Magnet (SMM) [Cu^II₃Tb^III(L^Et)(NO₃)₃(MeOH)]·MeOH (1) with Na₂[tpa] (tpa = terephthalate and H₆L^Et is the [3 + 3] imine macrocycle derived from 1,4-diformyl-2,3-dihydroxybenzene and 1,2-diaminoethane) gives a structurally characterised one-dimensional cationic polymer {[Cu^II₃Tb^III(L^Et)(tpa)(H₂O)₃](NO₃)·0.5H₂O·0.25MeOH}_n (2). A comparative study of the static and dynamic magnetic properties of 2 and its precursor, 1, is reported.