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Type: Artigo
Title: Influence of the metal ion on the topology and interpenetration of Pyridylvinyl(benzoate) based metal-organic frameworks
Author: Dezotti, Yuri
Ribeiro, Marco Antônio
Pirota, Kleber Roberto
Barros, Wdeson Pereira
Abstract: A family of four M(II)-metal-organic frameworks of general formula {[M-x(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 structural topologies.
Subject: Ligantes
Íons metálicos
Metal ions
Country: Estados Unidos
Editor: American Chemical Society
Rights: fechado
Identifier DOI: 10.1021/acs.cgd.9b00552
Date Issue: 2019
Appears in Collections:IFGW - Artigos e Outros Documentos

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