The mixed-valence manganese clusters [Mn12O12(carboxylato)(16)] have been o
rganized in a multilayer architecture. Indeed, well-defined Langmuir-Blodge
tt (LB) films of the acetate and the benzoate Mn-12 clusters can be obtaine
d using behenic acid as organic matrix. Here, we report the magnetic proper
ties of these multilayers, which present a marked hysteresis at 2 K.