A three dimensional magnetically frustrated metal–organic framework via the vertices augmentation of underlying net

In our efforts to fabricate magnetically frustrated materials, a feasible vertices augmentation method was successfully used to construct a 4-fold interpenetrating three dimensional metal–organic framework (MOF) with rare eta-c4 topology by linking [Fe3(μ3-O)(μ-O2CCH3)6]+ triangular moieties through the pure anti,anti acetate ligands. Strong antiferromagnetic interactions were found to exist between the neighboring FeIII ions without long-range magnetic ordering above 2.2 K, indicating the strong geometric spin frustration nature of this MOF.