Magnetic properties of a noninterpenetrating chiral porous cobalt metal-organic framewok
Conference Paper
Overview
Identity
Additional Document Info
Other
View All
Overview
abstract
Noninterpenetrating chiral porous cobalt metal-organic framework built from the coplanar triangular H3 TATB ligands has been synthesized under solvothermal conditions. X-ray analysis revealed the compound crystallized in the chiral space group either P 41 32 or P 43 32, and adopted a trimetallic "hourglass" secondary building unit, in which there are two terminal Td -Co atoms and one central Oh -Co with Td -Co and Oh -Co distance about 3.604 . Paramagnetic behavior is observed throughout the measured temperature range of 2-300 K. Assuming a uniform isotropic interaction between the nearest neighbor Co atoms, susceptibility of the trinuclear Co2+ linear chain has been calculated by following Van Vleck's quantum model for spin-spin couplings. The resultant fit to the data indicates an antiferromagnetic Co-Co interaction in the molecule, with coupling strength J-6.2 10-16 erg, -16 K. 2007 American Institute of Physics.
