A Mononuclear Uranium(IV) Single-Molecule Magnet with an Azobenzene Radical Ligand
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A Mononuclear Uranium(IV) Single-Molecule Magnet with an Azobenzene Radical Ligand

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A Mononuclear Uranium(IV) Single-Molecule Magnet with an Azobenzene Radical Ligand

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dc.contributor.author Antunes, Maria A.
dc.contributor.author Coutinho, Joana T.
dc.contributor.author Santos, Isabel C.
dc.contributor.author Marçalo, Joaquim
dc.contributor.author Almeida, Manuel
dc.contributor.author Baldoví, José J.
dc.contributor.author Pereira, Laura C. J.
dc.contributor.author Gaita Ariño, Alejandro
dc.contributor.author Coronado Miralles, Eugenio
dc.date.accessioned 2021-05-07T08:15:26Z
dc.date.available 2021-05-08T04:45:05Z
dc.date.issued 2015 es_ES
dc.identifier.uri https://hdl.handle.net/10550/79243
dc.description.abstract A tetravalent uranium compound with a radical azobenzene ligand, namely, [{(SiMe2NPh)3‐tacn}UIV(η2‐N2Ph2.)] (2), was obtained by one‐electron reduction of azobenzene by the trivalent uranium compound [UIII{(SiMe2NPh)3‐tacn}] (1). Compound 2 was characterized by single‐crystal X‐ray diffraction and 1H NMR, IR, and UV/Vis/NIR spectroscopy. The magnetic properties of 2 and precursor 1 were studied by static magnetization and ac susceptibility measurements, which for the former revealed single‐molecule magnet behaviour for the first time in a mononuclear UIV compound, whereas trivalent uranium compound 1 does not exhibit slow relaxation of the magnetization at low temperatures. A first approximation to the magnetic behaviour of these compounds was attempted by combining an effective electrostatic model with a phenomenological approach using the full single‐ion Hamiltonian. es_ES
dc.description.sponsorship FCT. Grant Number: UID/Multi/04349/2013 es_ES
dc.description.sponsorship FCT (Portugal). Grant Numbers: SFRH/BD/84628/2012, SFRH/BPD/74194/2010 es_ES
dc.description.sponsorship FCT (Portugal). Grant Number: PTDC/QEQ‐SUP/1413/2012 es_ES
dc.description.sponsorship FCT (Portugal). Grant Number: RECI/QEQ‐QIN/0189/2012 es_ES
dc.description.sponsorship SPINMOL FP7-ERC-247384 es_ES
dc.description.sponsorship ERC-2014-CoG-647301 DECRESIM es_ES
dc.description.sponsorship MAT2011‐22785 es_ES
dc.language.iso en es_ES
dc.source Maria A. Antunes, Joana T. Coutinho, Isabel C. Santos, Joaquim Marçalo, Manuel Almeida, José J. Baldoví, Laura C. J. Pereira, Alejandro Gaita-Ariño, Eugenio Coronado, Chemistry: A European Journal, 2015, 21 (49) 17817-17826 es_ES
dc.title A Mononuclear Uranium(IV) Single-Molecule Magnet with an Azobenzene Radical Ligand es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.unesco UNESCO::QUÍMICA es_ES
dc.identifier.doi https://doi.org/10.1002/chem.201503133 es_ES
dc.description.abstractenglish A tetravalent uranium compound with a radical azobenzene ligand, namely, [{(SiMe2NPh)3‐tacn}UIV(η2‐N2Ph2.)] (2), was obtained by one‐electron reduction of azobenzene by the trivalent uranium compound [UIII{(SiMe2NPh)3‐tacn}] (1). Compound 2 was characterized by single‐crystal X‐ray diffraction and 1H NMR, IR, and UV/Vis/NIR spectroscopy. The magnetic properties of 2 and precursor 1 were studied by static magnetization and ac susceptibility measurements, which for the former revealed single‐molecule magnet behaviour for the first time in a mononuclear UIV compound, whereas trivalent uranium compound 1 does not exhibit slow relaxation of the magnetization at low temperatures. A first approximation to the magnetic behaviour of these compounds was attempted by combining an effective electrostatic model with a phenomenological approach using the full single‐ion Hamiltonian. es_ES
dc.identifier.idgrec 109963 es_ES
dc.accrualMethod - es_ES
dc.embargo.terms 0 days es_ES

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