An unprecedented CoII cuboctahedron as the secondary building unit in a Co-based metal–organic framework†,10.1039/C3CC46396F

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An unprecedented CoII cuboctahedron as the secondary building unit in a Co-based metal–organic framework†

Rebecca J. Holmberg,Marika Kay,Ilia Korobkov,Eugene Kadantsev,Peter G. Boyd,Tomoko Aharen,Serge Desgreniers,Tom K. Woo,Muralee Murugesu

Chemical Communications Pub Date : 10/22/2013 00:00:00 , DOI:10.1039/C3CC46396F

Abstract

A cubic metal–organic framework with an unprecedented octanuclear secondary building unit (SBU) was isolated. The obtained SBU is composed of 8 Co^II ions at each vertex, 6 μ₄-OH groups at each face, and 12 cpt⁻ ligands framing the metal core. The cuboctahedra arrange in a ubt framework topology, eliciting a highly symmetrical MOF structure. Magnetic measurements as well as DFT calculations on this crystalline MOF reveal intramolecular antiferromagnetic coupling between Co^II ions in the octanuclear SBU.