Dy<sup>III</sup> single-molecule magnets from ligands incorporating both amine and acylhydrazine Schiff base groups: the centrosymmetric {Dy<sub>2</sub>} displaying dual magnetic relaxation behaviors
which consisted of a pair of Dy3} triangular units. All the complexes displayed a single relaxationprocess of single-moleculemagnet (SMM) behaviors under a zero dc field. Both 1 and 2 showed field-induced dual magnetic-relaxation behaviors. However, their diluted samples (1@Y and 2@Y) only showed one-step relaxation behaviors whether under a zero or applied dc field, indicating that the dual magnetic-relaxation