Mn(II) metal-organic frameworks based on Mn3 clusters: from 2D layer to 3D framework by the "pillaring" approach

Two complexes {[Mn-3(btcit)(2)(H2O)(2)(DMF)(2)]center dot 2DMF}(infinity) (1) and {[Mn-3(btcit)(2)(bib)(2)]center dot 2DMF}(infinity) (2) (H(3)btcit = 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 Mn-3 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.