Dodecanuclear MnII–GdIII metallomacrocycles: magnetic and refrigerant responses

Abstract

Two dodecanuclear metallomacrocycles with a {Mn^II₆Gd^III₆} skeleton are synthesized by employing the Schiff base derived from the condensation of carbohydrazide and o-vanillin. The paramagnetic centers show a weak AF interaction without an out-of-phase response. These half-filled shell cations provide the largest number of unpaired electrons for a 3d–4f combination of paramagnetic centres, and profiting from this feature, their magnetocaloric response is studied.