Exchange-bias quantum tunnelling in a CO₂-based Dy₄-single molecule magnet.

ABSTRACT: Carbamate formation in green-plants through the RuBisCO enzyme continuously plays a pivotal role in the conversion of CO₂ from the atmosphere into biomass. With this in mind, carbamate formation from CO₂ by a lanthanide source in the presence of a secondary amine is herein explored leading to a lanthanide-carbamate cage with the formula [Dy₄(O₂CNⁱPr₂)₁₂]. Magnetic studies show slow relaxation leading to the observation of hysteresis loops; the tetranuclear cage being a single molecule magnet. Detailed interpretation of the data reveals: (i) the presence of two different exchange interactions, ferromagnetic and antiferromagnetic and (ii) the observation of exchange-bias quantum tunnelling with two distinct sets of

SUBMITTER: Pineda EM 

PROVIDER: S-EPMC5369538 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature