Ligand radicals as modular organic electron spin qubits

McGuire, J., Miras, H. N. , Donahue, J. P., Richards, E. and Sproules, S. (2018) Ligand radicals as modular organic electron spin qubits. Chemistry: A European Journal, 24(66), pp. 17598-17605. (doi: 10.1002/chem.201804165) (PMID:30291646)

Abstract

The intrinsic redox activity of the dithiolene ligand is presented here as the novel spin host in the design of 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 (TM) 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 (T1) 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.

• Item Type: Articles
• Additional Information: We thank the Royal Society of Chemistry for awarding a J. W. T. Jones Travelling Fellowship Grant (S.S.) and financial support from the University of Glasgow. Support from the National Science Foundation (CHE-0845829 to J.P.D.) is gratefully acknowledged.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sproules, Dr Stephen and Moiras, Professor Haralampos and McGuire, Mr Jake
• Authors: McGuire, J., Miras, H. N., Donahue, J. P., Richards, E., and Sproules, S.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Chemistry: A European Journal
• Publisher: Wiley
• ISSN: 0947-6539
• ISSN (Online): 1521-3765
• Published Online: 05 October 2018
• Copyright Holders: Copyright © 2018 Wiley-VCH GmbH & Co. KGaA, Weinheim
• First Published: First published in Chemistry: A European Journal 24:17598-17605
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher