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A Clock Transition in the Cr7Mn Molecular Nanomagnet

https://doi.org/10.3390/magnetochemistry5010004

Collett, Charles; Ellers, Kai-Isaak; Russo, Nicholas; Kittilstved, Kevin; Timco, Grigore; Winpenny, Richard; Friedman, Jonathan (March 2019, Magnetochemistry)

A viable qubit must have a long coherence time T 2 . In molecular nanomagnets, T 2 is often limited at low temperatures by the presence of dipole and hyperfine interactions, which are often mitigated through sample dilution, chemical engineering and isotope substitution in synthesis. Atomic-clock transitions offer another route to reducing decoherence from environmental fields by reducing the effective susceptibility of the working transition to field fluctuations. The Cr7Mn molecular nanomagnet, a heterometallic ring, features a clock transition at zero field. Both continuous-wave and spin-echo electron-spin resonance experiments on Cr7Mn samples, diluted via co-crystallization, show evidence of the effects of the clock transition with a maximum T 2 ∼ 390 ns at 1.8 K. We discuss improvements to the experiment that may increase T 2 further.
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Adduct Ions as Diagnostic Probes of Metallosupramolecular Complexes Using Ion Mobility Mass Spectrometry

https://doi.org/10.1021/acs.inorgchem.2c03698

Geue, Niklas; Bennett, Tom S.; Ramakers, Lennart A. I.; Timco, Grigore A.; McInnes, Eric J. L.; Burton, Neil A.; Armentrout, P. B.; Winpenny, Richard E. P.; Barran, Perdita E. (January 2023, Inorganic Chemistry)
Disassembly Mechanisms and Energetics of Polymetallic Rings and Rotaxanes

https://doi.org/10.1021/jacs.2c07522

Geue, Niklas; Bennett, Tom S.; Arama, Alexandra-Ana-Maria; Ramakers, Lennart A. I.; Whitehead, George F. S.; Timco, Grigore A.; Armentrout, P. B.; McInnes, Eric J. L.; Burton, Neil A.; Winpenny, Richard E. P.; et al (December 2022, Journal of the American Chemical Society)

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