Improved slow magnetic relaxation in optically pure helicene-based DyIII single molecule magnets

Racemic and optically pure [Dy(hfac)3(L)] complexes with L = 3-(2-pyridyl)-4-aza[6]-helicene have been synthesized and characterized. Both the racemic and enantiopure forms behave as single molecule magnets in their crystalline phase, while electronic circular dichroism activity is evidenced. Ab ini...

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Published inChemical communications (Cambridge, England) Vol. 52; no. 100; pp. 14474 - 14477
Main Authors Ou-Yang, J-K, Saleh, N, Fernandez Garcia, G, Norel, L, Pointillart, F, Guizouarn, T, Cador, O, Totti, F, Ouahab, L, Crassous, J, Le Guennic, B
Format Journal Article
LanguageEnglish
Published 13.12.2016
Subjects
Couplings
Crystal structure
Dichroism
Electronics
Hysteresis loops
Magnetic properties
Magnets
Mathematical analysis
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Summary:Racemic and optically pure [Dy(hfac)3(L)] complexes with L = 3-(2-pyridyl)-4-aza[6]-helicene have been synthesized and characterized. Both the racemic and enantiopure forms behave as single molecule magnets in their crystalline phase, while electronic circular dichroism activity is evidenced. Ab initio calculations on isolated complexes followed by the determination of intermolecular dipolar couplings allowed the rationalization of the different low-temperature magnetic behaviours. The enantiopure SMM differs from the racemic one by the presence of a hysteresis loop in the former system.
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ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc08638a