Mn(ii) metal–organic frameworks based on Mn3 clusters: from 2D layer to 3D framework by the “pillaring” approach

Abstract

Two complexes {[Mn₃(btcit)₂(H₂O)₂(DMF)₂]·2DMF}_∞ (1) and {[Mn₃(btcit)₂(bib)₂]·2DMF}_∞ (2) (H₃btcit = 4,4′,4′′-[1,3,5-benzenetriyltris(carbonylimino)]trisbenzoic acid, bib = 1,4-bis(imidazol-1-yl)benzene) were obtained under the same reaction condition. Complex 1 is a two dimensional (4,4) network constructed from linear Mn₃ units and btcit ligands. Complex 2, which presents an interesting two-fold interpenetrating three dimensional framework with fsf topology, was obtained by modifying complex 1 with a “pillaring” approach. Moreover, the magnetic properties of 1 and 2 have been investigated and both of them show antiferromagnetic behaviour.