Mapping Magnetic Properties and Relaxation in Vanadium(IV) Complexes with Lanthanides by Electron Paramagnetic Resonance

Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases rep...

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Published in	Molecules Vol. 24; no. 24; p. 4582
Main Authors	Kurganskii, Ivan V., Bazhina, Evgeniya S., Korlyukov, Alexander A., Babeshkin, Konstantin A., Efimov, Nikolay N., Kiskin, Mikhail A., Veber, Sergey L., Sidorov, Alexey A., Eremenko, Igor L., Fedin, Matvey V.
Format	Journal Article
Language	English
Published	Switzerland MDPI AG 14.12.2019 MDPI
Subjects	Algorithms Aqueous solutions Coordination Complexes - chemical synthesis Coordination Complexes - chemistry Electron Spin Resonance Spectroscopy Hydrogen Lanthanoid Series Elements - chemistry Magnetic Phenomena Models, Theoretical Molecular Conformation Nitrates Phase Transition Spectrum analysis Trends Vanadium - chemistry EPR relaxation times vanadium(IV) ions
Online Access	Get full text
ISSN	1420-3049 1433-1373 1420-3049 1433-1373
DOI	10.3390/molecules24244582

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Abstract	Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases reported to date, the molecular complexes were optimized through the design for this purpose. In this work, we investigate the relaxation properties of vanadium(IV) ions incorporated in complexes with lanthanides using electron paramagnetic resonance (EPR). In all cases, the VO6 moieties with no nuclear spins in the first coordination sphere are addressed. We develop and implement the approaches for facile diagnostics of relaxation characteristics in individual VO6 moieties of such compounds. Remarkably, the estimated relaxation times are found to be close to those of other vanadium-based qubits obtained previously. In the future, a synergistic combination of qubit-friendly properties of vanadium ions with single-molecule magnetism and luminescence of lanthanides can be pursued to realize new functionalities of such materials.
AbstractList	Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases reported to date, the molecular complexes were optimized through the design for this purpose. In this work, we investigate the relaxation properties of vanadium(IV) ions incorporated in complexes with lanthanides using electron paramagnetic resonance (EPR). In all cases, the VO6 moieties with no nuclear spins in the first coordination sphere are addressed. We develop and implement the approaches for facile diagnostics of relaxation characteristics in individual VO6 moieties of such compounds. Remarkably, the estimated relaxation times are found to be close to those of other vanadium-based qubits obtained previously. In the future, a synergistic combination of qubit-friendly properties of vanadium ions with single-molecule magnetism and luminescence of lanthanides can be pursued to realize new functionalities of such materials. [...]it was demonstrated that even in aqueous solution at 310 K the dephasing time of the (immobilized) trityl label attached to DNA can reach Tm = 1.4 μs, whereas in glassy trehalose powder at 300 K it is Tm = 2.2 μs, both being longer than the record value for vanadium-based qubit being ~1 μs at 300 K [5,6]. [...]in terms of the relaxation properties, vanadium-based qubits need further development to outperform the existing molecular competitors such as trityls. [...]we selected vanadium-containing complexes of lanthanides (initially designed for another research) and attempted to investigate what would be the intrinsic electron spin relaxation of vanadium moieties in such more complicated compounds. The complexes III and IV are isostructural according to powder XRD (see Figure S1). [...]the structure of V-Ln heterometallic compounds with cbdc2− anions is determined by the presence and the nature of alkali cation: complexes I and II are molecular, and compounds III and IV are polymeric. Most evidently, in all spectra shown in Figure 4 we do observe hyperfine splitting characteristic for single vanadium(IV) [6], which would not be the case if the intermolecular exchange couplings were sensible. [...]in principle, the vanadium moieties in compounds I–IV were well magnetically isolated, and the similarity of the EPR parameters for I, II vs. Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases reported to date, the molecular complexes were optimized through the design for this purpose. In this work, we investigate the relaxation properties of vanadium(IV) ions incorporated in complexes with lanthanides using electron paramagnetic resonance (EPR). In all cases, the VO6 moieties with no nuclear spins in the first coordination sphere are addressed. We develop and implement the approaches for facile diagnostics of relaxation characteristics in individual VO6 moieties of such compounds. Remarkably, the estimated relaxation times are found to be close to those of other vanadium-based qubits obtained previously. In the future, a synergistic combination of qubit-friendly properties of vanadium ions with single-molecule magnetism and luminescence of lanthanides can be pursued to realize new functionalities of such materials.Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases reported to date, the molecular complexes were optimized through the design for this purpose. In this work, we investigate the relaxation properties of vanadium(IV) ions incorporated in complexes with lanthanides using electron paramagnetic resonance (EPR). In all cases, the VO6 moieties with no nuclear spins in the first coordination sphere are addressed. We develop and implement the approaches for facile diagnostics of relaxation characteristics in individual VO6 moieties of such compounds. Remarkably, the estimated relaxation times are found to be close to those of other vanadium-based qubits obtained previously. In the future, a synergistic combination of qubit-friendly properties of vanadium ions with single-molecule magnetism and luminescence of lanthanides can be pursued to realize new functionalities of such materials. Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin decoherence times than many other transition ions, being the key property for applications in quantum information processing. In most cases reported to date, the molecular complexes were optimized through the design for this purpose. In this work, we investigate the relaxation properties of vanadium(IV) ions incorporated in complexes with lanthanides using electron paramagnetic resonance (EPR). In all cases, the VO moieties with no nuclear spins in the first coordination sphere are addressed. We develop and implement the approaches for facile diagnostics of relaxation characteristics in individual VO moieties of such compounds. Remarkably, the estimated relaxation times are found to be close to those of other vanadium-based qubits obtained previously. In the future, a synergistic combination of qubit-friendly properties of vanadium ions with single-molecule magnetism and luminescence of lanthanides can be pursued to realize new functionalities of such materials.
Author	Fedin, Matvey V. Sidorov, Alexey A. Efimov, Nikolay N. Kiskin, Mikhail A. Bazhina, Evgeniya S. Korlyukov, Alexander A. Veber, Sergey L. Babeshkin, Konstantin A. Eremenko, Igor L. Kurganskii, Ivan V.
AuthorAffiliation	2 Novosibirsk State University, 630090 Novosibirsk, Russia 1 International Tomography Center SB RAS, 630090 Novosibirsk, Russia; ivan.kurganskiy@yandex.ru (I.V.K.); sergey.veber@tomo.nsc.ru (S.L.V.) 3 N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Science, 119991 Moscow, Russia; evgenia-vo@mail.ru (E.S.B.); bkonstantan@yandex.ru (K.A.B.); nnefimov@yandex.ru (N.N.E.); mkiskin@igic.ras.ru (M.A.K.); sidorov@igic.ras.ru (A.A.S.); ilerem@igic.ras.ru (I.L.E.) 4 Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 119991 Moscow, Russia; alex@xrlab.ineos.ac.ru
AuthorAffiliation_xml	– name: 1 International Tomography Center SB RAS, 630090 Novosibirsk, Russia; ivan.kurganskiy@yandex.ru (I.V.K.); sergey.veber@tomo.nsc.ru (S.L.V.) – name: 3 N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Science, 119991 Moscow, Russia; evgenia-vo@mail.ru (E.S.B.); bkonstantan@yandex.ru (K.A.B.); nnefimov@yandex.ru (N.N.E.); mkiskin@igic.ras.ru (M.A.K.); sidorov@igic.ras.ru (A.A.S.); ilerem@igic.ras.ru (I.L.E.) – name: 2 Novosibirsk State University, 630090 Novosibirsk, Russia – name: 4 Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences, 119991 Moscow, Russia; alex@xrlab.ineos.ac.ru
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Snippet	Vanadium(IV) complexes are actively studied as potential candidates for molecular spin qubits operating at room temperatures. They have longer electron spin... [...]it was demonstrated that even in aqueous solution at 310 K the dephasing time of the (immobilized) trityl label attached to DNA can reach Tm = 1.4 μs,...
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StartPage	4582
SubjectTerms	Algorithms Aqueous solutions Coordination Complexes - chemical synthesis Coordination Complexes - chemistry Electron Spin Resonance Spectroscopy Hydrogen Lanthanoid Series Elements - chemistry Magnetic Phenomena Models, Theoretical Molecular Conformation Nitrates Phase Transition Spectrum analysis Trends Vanadium - chemistry
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Title	Mapping Magnetic Properties and Relaxation in Vanadium(IV) Complexes with Lanthanides by Electron Paramagnetic Resonance
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