Modulation of slow magnetic relaxation in Gd(III)‐tetrahalosemiquinonate complexes

Simple item page
dc.contributor.authorDunstan, MAen_AU
dc.contributor.authorBrown, DSen_AU
dc.contributor.authorSorace, Len_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorBoskovic, Cen_AU
dc.date.accessioned2024-12-20T02:19:11Zen_AU
dc.date.available2024-12-20T02:19:11Zen_AU
dc.date.issued2022-07-15en_AU
dc.date.statistics2024-09-25en_AU
dc.description.abstractIncorporating lanthanoid(III)‐radical magnetic exchange coupling is a possible route to improving the performance of lanthanoid (Ln) single‐molecule magnets (SMMs), molecular materials that exhibit slow relaxation and low temperature quantum tunnelling of the magnetization. Complexes of Gd(III) can conveniently be used as model systems to study the Ln‐radical exchange coupling, thanks to the absence of the orbital angular momentum that is present for many Ln(III) ions. Two new Gd(III)‐radical compounds of formula [Gd(18‐c‐6)X4SQ(NO3)].I3 (18‐c‐6=18‐crown‐6, X4SQ⋅−=tetrahalo‐1,2‐semiquinonate, 1: X=Cl, 2: X=Br) have been synthesized, and the presence of the dioxolene ligand in its semiquinonate form confirmed by X‐ray crystallography, UV‐Visible‐NIR spectroscopy and voltammetry. Static magnetometry and EPR spectroscopy indicate differences in the low temperature magnetic properties of the two compounds, with antiferromagnetic exchange coupling of JGd‐SQ∼−2.0 cm−1 (Hex=−2JGd‐SQ(SGdSSQ)) determined by data fitting. Interestingly, compound 1 exhibits slow magnetic relaxation in applied magnetic fields while 2 relaxes much faster, pointing to the major role of packing effects in modulating slow relaxation of the magnetization. © 2022 The Authors. Chemistry – An Asian Journal published by Wiley-VCH GmbH - Open Access - CC-BY-NCen_AU
dc.description.sponsorshipM. A. D. acknowledges financial support from AINSE Limited (AINSE Post-Graduate Research Award) and the Australian Government for a Research Training Program stipend. C.B., and R.A.M. thank the Australian Research Council for funding (DP170100034 and LE210100009). We acknowledge the support of the Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organisation and the Australian Government through the National Collaborative Research Infrastructure Strategy. L. S. acknowledges the financial support of the Italian Ministry of Education, University and Research (MIUR), for the economic contribution within the “Progetto Dipartimenti di Eccellenza 2018- 2022” allocated to the Department of Chemistry “Ugo Schiff” (ref B96C1700020008). The authors would like to thank Dr Moya A. Hay and Dr Marcus J. Giansiracusa for helpful discussions. Open access publishing facilitated by The University of Melbourne, as part of the Wiley - The University of Melbourne agreement via the Council of Australian University Librarians. Conflict of interesten_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.articlenumbere202200325en_AU
dc.identifier.citationDunstan, M. A., Brown, D. S., Sorace, L., Mole, R. A., & Boskovic, C. (2022). Modulation of slow magnetic relaxation in Gd(III)-tetrahalosemiquinonate complexes. Chemistry – An Asian Journal, 17(14), e202200325. doi:10.1002/asia.202200325en_AU
dc.identifier.issn1861-4728en_AU
dc.identifier.issn1861-471Xen_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitleChemistry - An Asian Journalen_AU
dc.identifier.urihttps://doi.org/10.1002/asia.202200325en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15847en_AU
dc.identifier.volume17en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherWileyen_AU
dc.subjectModulationen_AU
dc.subjectMagnetismen_AU
dc.subjectGadoliniumen_AU
dc.subjectComplexesen_AU
dc.subjectMoleculesen_AU
dc.subjectMagnetizationen_AU
dc.subjectSynthesisen_AU
dc.subjectCrystallographyen_AU
dc.subjectSpectroscopyen_AU
dc.subjectTemperature rangeen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectAntiferromagnetismen_AU
dc.titleModulation of slow magnetic relaxation in Gd(III)‐tetrahalosemiquinonate complexesen_AU
dc.typeJournal Articleen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Modulation of Slow Magnetic Relaxation in Gd(III)-Tetrahalosemiquinonate Complexes.pdf
Size:
1.67 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.66 KB
Format:
Plain Text
Description:
Download
Collections
Journal Articles