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Ligand Radicals as Modular Organic Electron Spin Qubits
Author(s) -
McGuire Jake,
Miras Haralampos N.,
Donahue James P.,
Richards Emma,
Sproules Stephen
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201804165
Subject(s) - electron paramagnetic resonance , chemistry , ligand (biochemistry) , platinum , diamagnetism , qubit , pulsed epr , spin (aerodynamics) , chemical physics , radical , metal , crystallography , nuclear magnetic resonance , quantum , physics , spin echo , organic chemistry , medicine , biochemistry , receptor , thermodynamics , quantum mechanics , magnetic field , magnetic resonance imaging , radiology , catalysis
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.