Improved slow magnetic relaxation in optically pure helicene-based DyIII single molecule magnetsElectronic supplementary information (ESI) available: X-ray crystallographic files in CIF format, experimental and computational details, crystallographic data, and additional structural and magnetic figures and tables. CCDC 1511876-1511878. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6cc08638a

• 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: Article
• Language: English
• ISSN: 1359-7345; 1364-548X
• DOI: 10.1039/c6cc08638a

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. Racemic and optically pure [Dy(hfac) 3 (L)] complexes with L = 3-(2-pyridyl)-4-aza[6]-helicene have been synthesized and characterized.