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A series of isostructural octanuclear lanthanide complexes of general formula [Ln
8
(sao)
4
(μ
3
-OH)
4
-
(NO
3
)
12
(DMF)
12
] (Ln = Nd (
1
), Sm (
2
), Eu (
3
), Gd (
4
), Tb (
5
), Dy (
6
), Ho (
7
), Er (
8
); DMF = dimethylform-
amide) have been prepared
via
reactions of salicylaldoxime (saoH
2
), tetramethylammonium
hydroxide (Me
4
NOH) with the appropriate lanthanide nitrate salt (Ln(NO
3
)
3
·6H
2
O). The metallic skeletons
of the complexes describe [Ln
4
] tetrahedra encapsulated inside a [Ln
4
] square with the inner core
stabilised through
μ
3
-OH
−
ions and the periphery by
μ
4
-sao
2
−
ligands. The magnetic properties of
compounds
2
–
8
were investigated by
dc
and
ac
magnetometry. Temperature dependent
ac
magnetic sus-
ceptibility data reveal that the dysprosium analogue (
6
) displays an out-of-phase signal in the absence of
an applied magnetic
fi
eld 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.