Squaring the cube: a family of octametallic lanthanide complexes including a Dy8 single-molecule magnet.
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A series of isostructural octanuclear lanthanide complexes of general formula [Ln8(sao)4(3-OH)4(NO3)12(DMF)12] (Ln = Nd (), Sm (), Eu (), Gd (), Tb (), Dy (), Ho (), Er (); DMF = dimethylformamide) have been prepared via reactions of salicylaldoxime (saoH2), tetramethylammonium hydroxide (Me4NOH) with the appropriate lanthanide nitrate salt (Ln(NO3)36H2O). The metallic skeletons of the complexes describe [Ln4] tetrahedra encapsulated inside a [Ln4] square with the inner core stabilised through 3-OH(-) ions and the periphery by 4-sao(2-) ligands. The magnetic properties of compounds were investigated by dc and ac magnetometry. Temperature dependent ac magnetic susceptibility data reveal that the dysprosium analogue () displays an out-of-phase signal in the absence of an applied magnetic field indicative of slow relaxation of the magnetization typical of a Single-Molecule Magnet (SMM). Micro-SQUID measurements reveal temperature and sweep rate dependent hysteresis below 1.0 K.
author list (cited authors)
Fang, M., Zhao, H., Prosvirin, A. V., Pinkowicz, D., Zhao, B., Cheng, P., ... Dunbar, K. R.
complete list of authors
Fang, Ming||Zhao, Hanhua||Prosvirin, Andrey V||Pinkowicz, Dawid||Zhao, Bin||Cheng, Peng||Wernsdorfer, Wolfgang||Brechin, Euan K||Dunbar, Kim R