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Field-induced slow magnetic relaxation in the first Dy(iii)-centered 12-metallacrown-4 double-decker
Angeliki A Athanasopoulou1, José J Baldoví2, Luca M Carrella3
1Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany. rentschl@uni-mainz.de and Graduate School Materials Science in Mainz, Staudinger Weg 9, D-55128 Mainz, Germany.
Abstract:
The reaction of Dy(O2CMe)3·xH2O and Ga(NO3)3·xH2O led to the isolation of (nBu4N)[GaDyIII(OH)4(shi)8] (1). The compound possesses a unique chemical structure enclosing the central magnetic DyIII ion between diamagnetic GaIII-based metallacrown 12-MC-4 ligands. The double-decker complex exhibits field-induced single-molecule magnet (SMM) behaviour with an effective energy barrier (Ueff) of 39 K (27.1 cm-1). Consistent with the observed slow relaxation of magnetization, theoretical calculations suggest a ground state mainly determined by |±11/2> in the easy axis direction.
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