Ligand Radicals as Modular Organic Electron Spin Qubits. Issue 66 (2nd November 2018)

• Record Type: Journal Article
• Authors: McGuire, Jake; Miras, Haralampos N.; Donahue, James P.; Richards, Emma; Sproules, Stephen
• Is Part Of: Chemistry. Volume 24:Issue 66(2018)
• Page Start: 17598
• Page End: 17605
• Publication Date: 2018-11-02
• Subjects: EPR spectroscopy -- ligand radicals -- metallodithiolene complexes -- quantum computing -- spin-orbit coupling; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201804165
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: The intrinsic redox activity of the dithiolene ligand is presented here as the novel spin host in the design of a prototype molecular electron spin qubit, where the traditional roles of the metal and ligand components in coordination complexes are inverted. A series of paramagnetic bis(dithiolene) complexes with group 10 metals—nickel, palladium, platinum—provides a backdrop to investigate the spin dynamics of the organic ligand radical using pulsed EPR spectroscopy. The temperature dependence of the phase memory time ( T M ) is shown to be dependent on the identity of the diamagnetic metal ion, with the short times recorded for platinum a consequence of a diminishing spin‐lattice ( T 1 ) relaxation time driven by spin‐orbit coupling. The utility of the radical ligand spin center is confirmed when it delivers one of the longest phase memory times ever recorded for a molecular two‐qubit prototype. Abstract : Do your qubit : The redox‐active dithiolene ligand is presented as a novel spin host in the design of prototype molecular electron spin qubits. The modularity of the metallodithiolene motif is demonstrated in the assemblage of a prototype two‐qubit system with one of the longest reported phase memory times for a coordination complex (see Figure).