Influence of theMetal Ion on the Topology and Interpenetrationof Pyridylvinyl(benzoate) Based Metal–Organic Frameworks

A family of four M(II)-metal–organic frameworks of general formula {[Mx(pvb)2x]·y(dmf)}n (M = Cu, 1; M = Co, 2; M = Ni, 3; M = Mn, 4), based on the bis{4-[2-(4-pyridyl)ethenyl]} benzoic acid (Hpvb) ligand, were obtained. 1 exhibits a 5-fold interpenetrated lvt framework, 2 and 3 a 7-fold interpenetrating dia framework, and 4 a 2-fold interpenetrated dmc framework. Magnetic properties of 1–4 have been investigated. 1 was analyzed by a Curie–Weiss model, while 2 and 3 where analyzed by a zero-field splitting model due to the very long metal–metal distances, which results in very weak antiferromagnetic interactions. The coupling pathway in 4 was done by carboxylate bridges instead of the pvb pathway, affording a short metal–metal separation that was analyzed by a isotropic Heisenberg spin Hamiltonian for a linear trinuclear Mn(II) cluster. The different metal coordination modes and geometries, along with template effects induced by the solvent, play an important role in the formation of distinctive structura...