Transition Ion Strikes Back: Large Magnetic Susceptibility Anisotropy in Cobalt(II) Clathrochelates.

@article{Novikov2014TransitionIS,
  title={Transition Ion Strikes Back: Large Magnetic Susceptibility Anisotropy in Cobalt(II) Clathrochelates.},
  author={Valentin V Novikov and Alexander A. Pavlov and Alexander S Belov and Anna V Vologzhanina and Anton Savitsky and Yan Z Voloshin},
  journal={The journal of physical chemistry letters},
  year={2014},
  volume={5 21},
  pages={3799-803}
}
Transition-metal complexes are rarely considered as paramagnetic tags for NMR spectroscopy due to them generally having relatively low magnetic anisotropy. Here we report cobalt(II) cage complexes with the largest (among the transition-metal complexes) axial anisotropy of magnetic susceptibility, reaching as high as 12.6 × 10(-32) m(3) at room temperature. This remarkable anisotropy, which results from an unusual trigonal prismatic geometry of the complexes and translates into large negative… CONTINUE READING

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