Control of decoherence: the case of Cr7Ni rings
At low temperature and for diluted molecules, decoherence is induced by hyperfine interactions with nuclear spins.
Effects of different nuclear sites/species calculated for Cr7Ni [F. Troiani, V. Bellini, and M. Affronte, Phys. Rev. B 77, 054428 (2008)]
NMR line broadening at F nuclear sites [Micotti et al., Phys. Rev. Lett. 97, 267204 (2006)]
Effect of de-protonation in Cr7Ni measured by Electron Spin Resonance [Ardavan et al., Phys. Rev. Lett. 98, 057201 (2007)]
"Heterometallic Rings Made From Chromium Stick Together Easily" [G. Timco et al., Angew. Chem. Int. Ed. 47, 9681 (2008)] 
"Decoherence induced by hyperfine interactions with nuclear spins in antiferromagnetic molecular rings", [F. Troiani et al., Physical Review B, 77, 054428 (2008)]
"Will Spin-Relaxation Times in Molecular Magnets Permit Quantum Information Processing?", [O. Ardavan et al., Physical Review Letters, 98, 057201 (2007)]