Understanding the magnetism of {Fe2Ln} dimers, step-by-step†
Abstract
A magnetochemical comparison between the {FeIII4LnIII2}-type coordination clusters [Fe4M2(OH)2(N3)2(bdea)4(O2CCMe3)5(H2O)]NO3·2(EtOH) (M = Dy, Y) and [Fe4M2(OH)2(N3)2(bdea)4(O2CCMe3)4(NO3)2]·3(EtOH) (M = Gd, Eu; H2bdea = N-butyldiethanolamine), of which {Fe4Dy2} reveals slow molecular magnetization relaxation up to 6 K, allows assessment of the exchange coupling governing the clusters’ multiplet patterns.