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Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound

Štefančič, Aleš; Klupp, Gyöngyi; Knaflič, Tilen; Yufit, Dmitry S.; Tavčar, Gašper; Potočnik, Anton; Beeby, Andrew; Arčon, Denis

Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound Thumbnail


Authors

Aleš Štefančič

Gyöngyi Klupp

Tilen Knaflič

Gašper Tavčar

Anton Potočnik

Denis Arčon



Abstract

The reduction of polycyclic aromatic hydrocarbons with alkali metals results in solids having intriguing magnetic properties the understanding of which has been hitherto severely hampered by the lack of single-phase samples. Here, we report on the successful reduction of triphenylene with stoichiometric amount of potassium in 1,2-dimethoxyethane (DME) solution. Comprehensive diffraction measurements of the obtained K2(C18H12)2(DME) solid demonstrate the importance of cation-π interactions as responsible for the characteristic stacking of the triphenylide molecular ions. Electron paramagnetic resonance and magnetization measurements reveal K2(C18H12)2(DME) is a Mott insulator with strikingly strong nearest neighbor antiferromagnetic interactions between S = 1/2 spins of (C18H12)•– radical anions. Low dimensionality hinders long-range magnetic ordering and establishes a spin state that resembles gapped quantum spin liquid state.

Citation

Štefančič, A., Klupp, G., Knaflič, T., Yufit, D. S., Tavčar, G., Potočnik, A., …Arčon, D. (2017). Triphenylide-Based Molecular Solid—A New Candidate for a Quantum Spin-Liquid Compound. Journal of Physical Chemistry C, 121(27), 14864-14871. https://doi.org/10.1021/acs.jpcc.7b02763

Journal Article Type Article
Acceptance Date Jun 8, 2017
Online Publication Date Jun 9, 2017
Publication Date Jun 9, 2017
Deposit Date Aug 9, 2017
Publicly Available Date Mar 28, 2024
Journal Journal of Physical Chemistry C
Print ISSN 1932-7447
Electronic ISSN 1932-7455
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 121
Issue 27
Pages 14864-14871
DOI https://doi.org/10.1021/acs.jpcc.7b02763

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The journal of physical chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.7b02763





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