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Robust coherent spin centers from stable azafullerene radicals entrapped in cycloparaphenylene rings
Ist Teil von
Nanoscale, 2021-12, Vol.13 (47), p.19946-19955
Ort / Verlag
England: Royal Society of Chemistry
Erscheinungsjahr
2021
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Molecular entities with robust spin-1/2 are natural two-level quantum systems for realizing qubits and are key ingredients of emerging quantum technologies such as quantum computing. Here we show that robust and abundant spin-1/2 species can be created
in situ
in the solid state from spin-active azafullerene C
59
N cages supramolecularly hosted in crystals of [10]cycloparaphenylene ([10]CPP) nanohoops. This is achieved
via
a two-stage thermally-assisted homolysis of the parent diamagnetic [10]CPP⊃(C
59
N)
2
⊂[10]CPP supramolecular complex. Upon cooling, the otherwise unstable C
59
N&z.rad; radical is remarkably persistent with a measured radical lifetime of several years. Additionally, pulsed electron paramagnetic resonance measurements show long coherence times, fulfilling a basic condition for any qubit manipulation, and observed Rabi oscillations demonstrate single qubit operation. These findings together with rapid recent advances on the synthesis of carbon nanohoops offer the potential to fabricate tailored cycloparaphenylene networks hosting C
59
N&z.rad; centers, providing a promising platform for building complex qubit circuits.
Stable and abundant spin-1/2 species from azafullerene (C
59
N&z.rad;) supramolecularly hosted in [10]cycloparaphenylene nanohoops are operated as stable qubits, with possibility of qubit wiring
via
intermediate polymerized spin-redistributed states.